{"id":2658,"date":"2015-02-03T06:56:33","date_gmt":"2015-02-03T06:56:33","guid":{"rendered":"http:\/\/bestkora.com\/IosDeveloper\/?p=2658"},"modified":"2016-03-10T14:13:17","modified_gmt":"2016-03-10T14:13:17","slug":"zadanie-1-cs193p-winter-2015-kalkulyator-new","status":"publish","type":"post","link":"https:\/\/bestkora.com\/IosDeveloper\/zadanie-1-cs193p-winter-2015-kalkulyator-new\/","title":{"rendered":"\u0417\u0430\u0434\u0430\u043d\u0438\u0435  1 cs193p Winter 2015 \u041a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 Swift 1.2 \u0438 Swift 2.0"},"content":{"rendered":"<h2>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/h2>\n<p>\u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430 \u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430\u00a0<span style=\"color: #373737;\">\u00a0<\/span><strong><a style=\"color: #1982d1;\" title=\"Developing iOS 7 Apps: Assignment 1\" href=\"https:\/\/itunes.apple.com\/us\/course\/developing-ios-8-apps-swift\/id961180099\" target=\"_blank\">iTunes \u0432 \u043f\u0443\u043d\u043a\u0442\u0435 \u201cDeveloping iOS 8 app: Programming: Project 1\u2033<\/a><\/strong><span style=\"color: #373737;\">.\u00a0<\/span>\u041d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0437\u0434\u0435\u0441\u044c:<p><span class=\"gdm-drivefile-embed\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ssl.gstatic.com\/docs\/doclist\/images\/icon_12_pdf_list.png\" width=\"16\" height=\"16\" \/> <a href=\"https:\/\/drive.google.com\/file\/d\/0B0jZOSo2e4NmMk15RnZSWnlVNTQ\/view?usp=drivesdk\" target=\"&quot;_blank&quot;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 1 iOS 8.pdf<\/a><\/span><\/p><\/p>\n<p>\u041d\u0430\u0447\u0438\u043d\u0430\u0435\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c \u0417\u0430\u0434\u0430\u043d\u0438\u0435 1 \u0441 \u043a\u043e\u0434\u0430, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u043a\u043e\u043d\u0446\u0435 \u041b\u0435\u043a\u0446\u0438\u0438 2 \u0441 \u0443\u0447\u0435\u0442\u043e\u043c \u0443\u0442\u043e\u0447\u043d\u0435\u043d\u0438\u0439 \u0434\u043b\u044f <strong>Swift<\/strong> <strong>1.2<\/strong>. \u041f\u0440\u043e\u0444\u0435\u0441\u0441\u043e\u0440 \u043d\u0430\u0441\u0442\u043e\u044f\u0442\u0435\u043b\u044c\u043d\u043e \u0440\u0435\u043a\u043e\u043c\u0435\u043d\u0434\u0443\u0435\u0442 \u043d\u0435 \u043a\u043e\u043f\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043a\u043e\u0434 \u0432 \u043f\u0435\u0440\u0432\u044b\u0445 2-\u0445 \u0417\u0430\u0434\u0430\u043d\u0438\u044f\u0445, \u0430 \u043d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u043f\u0435\u0447\u0430\u0442\u0430\u0442\u044c, \u0442\u0430\u043a \u043a\u0430\u043a \u044d\u0442\u043e \u0434\u0430\u0441\u0442 \u0445\u043e\u0440\u043e\u0448\u0438\u0439 \u043e\u043f\u044b\u0442 \u043e\u0441\u0432\u043e\u0435\u043d\u0438\u044f \u0441\u0440\u0435\u0434\u044b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 <strong>Xcode<\/strong>. \u042f \u0432\u0441\u0435-\u0442\u0430\u043a\u0438 \u043f\u0440\u0438\u0432\u0435\u043b\u0430 \u043d\u0430 <strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-2015\">Github<\/a><\/strong> \u043a\u043e\u0434 \u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0433\u043e \u043f\u0440\u0438\u043c\u0435\u0440\u0430, <strong>\u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0439 \u043e\u043a\u043e\u043d\u0447\u0430\u043d\u0438\u044e \u041b\u0435\u043a\u0446\u0438\u0438 2<\/strong>. \u042d\u0442\u043e \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442 \u0441\u043e\u0432\u0441\u0435\u043c \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0449\u0438\u043c \u043d\u0435 &#171;\u0437\u0430\u0441\u0442\u0440\u044f\u0442\u044c&#187; \u043d\u0430 \u0441\u0430\u043c\u043e\u043c \u043f\u0435\u0440\u0432\u043e\u043c \u044d\u0442\u0430\u043f\u0435.<\/p>\n<p>\u041d\u0438\u0436\u0435 \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u0432\u0441\u0435\u0445 \u043f\u0443\u043d\u043a\u0442\u043e\u0432 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u0434\u043b\u044f \u0442\u0435\u0445, \u043a\u0442\u043e \u0445\u043e\u0447\u0435\u0442 \u0441\u0440\u0430\u0432\u043d\u0438\u0442\u044c \u0441\u0432\u043e\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0441 \u043c\u043e\u0438\u043c, \u0438 \u043e\u043a\u043e\u043d\u0447\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043a\u043e\u0434 \u00a0\u0417\u0430\u0434\u0430\u043d\u0438\u044f 1 \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a><\/strong>.<\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 2 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p><strong>\u0412\u0430\u0448 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 (calculator) \u0443\u0436\u0435 \u0443\u043c\u0435\u0435\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u0441 \u0447\u0438\u0441\u043b\u0430\u043c\u0438 \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0435\u0441\u043b\u0438 \u0432\u044b \u043f\u043e\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u0431\u0443\u0434\u0435\u0442\u0435 \u043d\u0430\u0436\u0438\u043c\u0430\u0442\u044c \u043d\u0430 \u043a\u043b\u0430\u0432\u0438\u0448\u0438 3\u00a0<b>\u23ce\u00a0<\/b>4 \u00f7 \u00a0\u0442\u043e \u043e\u043d \u043f\u043e\u043a\u0430\u0436\u0435\u0442 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u00a00.75), \u0442\u0435\u043c \u043d\u0435 \u043c\u0435\u043d\u0435\u0435, \u043f\u043e\u043a\u0430 \u043d\u0435\u0442 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u0435\u043b \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439. \u042d\u0442\u043e \u043d\u0430\u0434\u043e \u0438\u0441\u043f\u0440\u0430\u0432\u0438\u0442\u044c. \u0420\u0430\u0437\u0440\u0435\u0448\u0438\u0442\u0435 \u0432\u0432\u043e\u0434\u0438\u0442\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u0435 \u0447\u0438\u0441\u043b\u0430 \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439 (\u043d\u0430\u043f\u0440\u0438\u043c\u0440, \u00a0\u201c192.168.0.1\u201d \u00a0&#8212; \u043d\u0435\u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439). \u0412\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u043d\u043e\u0432\u0443\u044e \u043a\u043d\u043e\u043f\u043a\u0443 \u0441 \u0442\u043e\u0447\u043a\u043e\u0439 \u201c.\u201d. \u0412 \u044d\u0442\u043e\u043c \u0437\u0430\u0434\u0430\u043d\u0438\u0438 \u043d\u0435 \u0431\u0435\u0441\u043f\u043e\u043a\u043e\u0439\u0442\u0435\u0441\u044c \u043e \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438.<\/strong><\/p><\/blockquote>\n<p>\u041f\u0440\u0435\u0436\u0434\u0435 \u0432\u0441\u0435\u0433\u043e \u043d\u0430\u0434\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u0437\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435 \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0435\u043b\u044c\u043d\u043e <strong>\u0442\u043e\u0447\u043a\u0438 &#171;.&#187;<\/strong> \u043a\u0430\u043a \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044f.<\/p>\n<p><strong>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435.<\/strong>\u00a0\u0415\u0441\u043b\u0438 \u0432\u044b \u0431\u0443\u0434\u0435\u0442\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0441\u0438\u043c\u0432\u043e\u043b\u00a0\u00a0<strong>\u0442\u043e\u0447\u043a\u0438\u00a0&#171;.&#187;<\/strong>\u00a0\u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044f \u0432\u00a0\u0417\u0430\u0434\u0430\u043d\u0438\u0438 1, \u0442\u043e \u043e\u043d\u043e \u043c\u043e\u0436\u0435\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043d\u0430 \u0441\u0438\u043c\u0443\u043b\u044f\u0442\u043e\u0440\u0435 \u0438 \u043d\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043d\u0430 \u0432\u0430\u0448\u0435\u043c\u00a0<strong>\u0440\u0435\u0430\u043b\u044c\u043d\u043e\u043c<\/strong>\u00a0<strong>\u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0435<\/strong>, \u0435\u0441\u043b\u0438\u00a0<strong>\u0420\u0435\u0433\u0438\u043e\u043d<\/strong>\u00a0\u043d\u0430 \u0432\u0430\u0448\u0435\u043c \u043f\u0440\u0438\u0431\u043e\u0440\u0435 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d \u0442\u0430\u043a, \u0447\u0442\u043e<strong>\u00a0\u0442\u0430\u043c \u043d\u0435 \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u0442\u0441\u044f &#171;.&#187;<\/strong>\u00a0\u0434\u043b\u044f \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0445 \u0447\u0438\u0441\u0435\u043b. \u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0437\u0430\u043a\u043e\u043d\u0447\u0438\u0442\u0441\u044f \u0430\u0432\u0430\u0440\u0438\u0439\u043d\u043e. \u041d\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u0432<strong>\u00a0\u043b\u044e\u0431\u043e\u043c \u0420\u0435\u0433\u0438\u043e\u043d\u0435.<\/strong><\/p>\n<p>\u0414\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u043d\u0435 \u0437\u0430\u0432\u0438\u0441\u0435\u0442\u044c \u043e\u0442\u00a0<strong>\u0420\u0435\u0433\u0438\u043e\u043d\u0430,<\/strong>\u00a0\u043b\u0443\u0447\u0448\u0435 \u043f\u043e\u043b\u0443\u0447\u0430\u0442\u044c\u00a0\u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c \u0434\u043b\u044f \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0445 \u0447\u0438\u0441\u0435\u043b \u043d\u0435\u043f\u043e\u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0432 \u0432\u0430\u0448\u0435\u043c \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0435 :<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-8.13.14-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1545 \" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-8.13.14-PM.png\" alt=\"Screen Shot 2015-03-25 at 8.13.14 PM\" width=\"529\" height=\"51\" \/><\/a><\/p>\n<p>\u041d\u043e \u0432\u0435\u0440\u043d\u0435\u043c\u0441\u044f \u043a \u043d\u0430\u0448\u0435\u043c\u0443 \u043f\u0443\u043d\u043a\u0442\u0443 \u0417\u0430\u0434\u0430\u043d\u0438\u044f \u0438 \u043f\u043e\u043f\u044b\u0442\u0430\u0435\u043c\u0441\u044f \u0437\u0430\u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u044b\u0439 \u0432\u0432\u043e\u0434 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u043e\u0433\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0434\u0430\u043b\u044c\u0448\u0435 \u043f\u043e \u0442\u0435\u043a\u0441\u0442\u0443 \u043c\u044b \u0431\u0443\u0434\u0435\u043c \u0443\u0441\u043b\u043e\u0432\u043d\u043e \u043d\u0430\u0437\u044b\u0432\u0430\u0442\u044c <strong>&#171;\u0442\u043e\u0447\u043a\u043e\u0439&#187;<\/strong>, \u0445\u043e\u0442\u044f, \u043a\u0430\u043a \u043c\u044b \u0443\u0436\u0435 \u0437\u043d\u0430\u0435\u043c, \u044d\u0442\u043e &#8212; \u043d\u0435 \u0432\u0441\u0435\u0433\u0434\u0430 \u0442\u043e\u0447\u043a\u0430. \u0414\u043b\u044f \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u043a\u0438 \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u0433\u043e \u0432\u0432\u043e\u0434\u0430 \u0442\u043e\u0447\u043a\u0438 \u043f\u0440\u043e\u0449\u0435 \u0432\u0441\u0435\u0433\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044e\u00a0<strong><span style=\"color: #0000ff;\">rangeOfString<\/span><\/strong>\u00a0\u043f\u0440\u0438 \u0432\u0432\u043e\u0434\u0435 \u043b\u044e\u0431\u043e\u0439 \u0446\u0438\u0444\u0440\u044b (\u043a \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u043e\u0442\u043d\u043e\u0441\u0438\u0442\u0441\u044f \u0438 \u0442\u043e\u0447\u043a\u0430). \u0414\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u043d\u0430\u043c \u043f\u043e\u043d\u0430\u0434\u043e\u0431\u0438\u0442\u0441\u044f \u0432\u0441\u0435\u0433\u043e \u043e\u0434\u043d\u0430 \u0441\u0442\u0440\u043e\u043a\u0430<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2697 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM.png\" alt=\"Screen Shot 2015-08-19 at 9.05.30 AM\" width=\"1418\" height=\"518\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM.png 1418w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM-300x110.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM-1024x374.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-9.05.30-AM-500x183.png 500w\" sizes=\"auto, (max-width: 1418px) 100vw, 1418px\" \/><\/a><br \/>\n\u0421\u043b\u0443\u0447\u0430\u0439\u00a0\u0432\u0432\u043e\u0434\u0430 \u0432 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0447\u0438\u0441\u043b\u0430 \u201c.5\u201d \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u043e \u0431\u0435\u0437 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043a\u043e\u0434\u0430.<br \/>\n\u0415\u0441\u043b\u0438 \u043c\u044b \u043f\u043e\u0439\u0434\u0435\u043c \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u0434\u0430\u043b\u044c\u0448\u0435, \u0438\u0441\u0441\u043b\u0435\u0434\u0443\u044f \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0439 \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c, \u0442\u043e \u043d\u0430\u043c \u0437\u0430\u0445\u043e\u0447\u0435\u0442\u0441\u044f \u0438\u043c\u0435\u0442\u044c \u043a\u043d\u043e\u043f\u043a\u0443 \u043d\u0435 \u0441 \u0442\u043e\u0447\u043a\u043e\u0439 &#171;.&#187;, \u0430 \u0441 \u0442\u0435\u043c \u0437\u043d\u0430\u043a\u043e\u043c, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043f\u0440\u0438\u043d\u044f\u0442 \u0432 \u044d\u0442\u043e\u043c <strong>\u0420\u0435\u0433\u0438\u043e\u043d\u0435<\/strong>. \u0414\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u0441\u0434\u0435\u043b\u0430\u0435\u043c\u00a0<strong>outlet<\/strong>\u00a0\u0434\u043b\u044f \u043a\u043d\u043e\u043f\u043a\u0438 \u0441 \u0443\u0441\u043b\u043e\u0432\u043d\u044b\u043c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435\u043c &#171;\u0442\u043e\u0447\u043a\u0430&#187;<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-8.21.37-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1547 \" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-8.21.37-PM.png\" alt=\"Screen Shot 2015-03-25 at 8.21.37 PM\" width=\"534\" height=\"35\" \/><\/a><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1513 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM.png\" alt=\"Screen Shot 2015-03-24 at 8.45.26 PM\" width=\"2282\" height=\"1036\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM.png 2282w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM-300x136.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM-1024x465.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-8.45.26-PM-500x227.png 500w\" sizes=\"auto, (max-width: 2282px) 100vw, 2282px\" \/><\/a><br \/>\n\u041c\u044b \u0434\u043e\u043b\u0436\u043d\u044b \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043e\u043a \u044d\u0442\u043e\u0439 \u043a\u043d\u043e\u043f\u043a\u0438 \u0440\u0430\u0432\u043d\u044b\u043c\u00a0<strong><span style=\"color: #0000ff;\">decimalSeparator<\/span><\/strong>\u00a0\u0438 \u044d\u0442\u043e \u043c\u043e\u0436\u043d\u043e \u0441\u0434\u0435\u043b\u0430\u0442\u044c \u0434\u0432\u0443\u043c\u044f \u0441\u043f\u043e\u0441\u043e\u0431\u0430\u043c\u0438 :<\/p>\n<ol>\n<li>\u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043c\u0435\u0442\u043e\u0434\u0430<strong><span style=\"color: #0000ff;\">\u00a0viewDidLoad ()<\/span><\/strong>\u00a0&#171;\u0436\u0438\u0437\u043d\u0435\u043d\u043d\u043e\u0433\u043e \u0446\u0438\u043a\u043b\u0430&#187;\u00a0<strong>Controller<\/strong>\u00a0(\u043e\u0431 \u044d\u0442\u043e\u043c \u0431\u0443\u0434\u0435\u0442 \u043b\u0435\u043a\u0446\u0438\u044f 8); \u044d\u0442\u043e\u0442 \u043c\u0435\u0442\u043e\u0434 \u0441\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u043e\u0434\u0438\u043d \u0440\u0430\u0437 \u043f\u0440\u0438 \u0437\u0430\u0433\u0440\u0443\u0437\u043a\u0435\u00a0<strong>Controller<\/strong><\/li>\n<li>\u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u041d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u0435\u043b\u044f\u00a0<strong><span style=\"color: #0000ff;\">didSet{}<\/span>\u00a0<\/strong>\u0421\u0432\u043e\u0439\u0441\u0442\u0430\u00a0<strong><span style=\"color: #0000ff;\">@IBOutlet weak var tochka<\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">; \u044d\u0442\u043e\u0442 \u043c\u0435\u0442\u043e\u0434 \u0432\u044b\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043e\u0434\u0438\u043d \u0440\u0430\u0437 \u043f\u0440\u0438 \u00a0\u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0435 \u044d\u0442\u043e\u0433\u043e\u00a0<strong>outlet<\/strong>\u00a0\u00a0\u0441\u043e \u00a0<strong>storyboard<\/strong><\/span><\/span><\/li>\n<\/ol>\n<p>\u041f\u0435\u0440\u0432\u044b\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u0441\u0432\u044f\u0437\u0430\u043d \u0441 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u0435\u043c \u043c\u0435\u0442\u043e\u0434\u0430\u00a0<strong><span style=\"color: #0000ff;\">viewDidLoad ()<\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.32.10-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1518 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.32.10-PM.png\" alt=\"Screen Shot 2015-03-24 at 11.32.10 PM\" width=\"1022\" height=\"432\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.32.10-PM.png 1022w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.32.10-PM-300x127.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.32.10-PM-500x211.png 500w\" sizes=\"auto, (max-width: 1022px) 100vw, 1022px\" \/><\/a><\/p>\n<p>\u0412\u0442\u043e\u0440\u043e\u0439 \u043c\u0435\u0442\u043e\u0434 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u00a0<strong>\u041d\u0430\u0431\u043b\u044e\u0434\u0430\u0442\u0435\u043b\u044f\u00a0\u0421\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u00a0<span style=\"color: #0000ff;\">tochka <span style=\"color: #333333;\">didSet {}<\/span><\/span><\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1519 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM.png\" alt=\"Screen Shot 2015-03-24 at 11.37.09 PM\" width=\"1130\" height=\"304\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM.png 1130w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM-300x81.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM-1024x275.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-24-at-11.37.09-PM-500x135.png 500w\" sizes=\"auto, (max-width: 1130px) 100vw, 1130px\" \/><\/a><\/p>\n<p>\u042f \u0432\u044b\u0431\u0440\u0430\u043b\u0430 \u0432\u0442\u043e\u0440\u043e\u0439 \u043c\u0435\u0442\u043e\u0434 \u0438 \u0434\u043b\u044f \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0438 \u043f\u043e\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043d\u0430 \u043a\u043d\u043e\u043f\u043a\u0435 \u043d\u0435 &#171;<strong>.<\/strong>&#171;, \u0430 \u0442\u0440\u0438 \u0441\u0438\u043c\u0432\u043e\u043b\u0430\u00a0<strong>&#171;Poi<\/strong>&#171;, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0434\u043e\u043b\u0436\u043d\u044b \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u0441\u044f \u043d\u0430 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0439 \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u00a0<strong><span style=\"color: #0000ff;\">decimalSeparator<\/span><\/strong>, \u0432\u0437\u044f\u0442\u044b\u0439 \u0438\u0437\u00a0<span style=\"color: #0000ff;\"><strong>NSNumberFormatter()<\/strong><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-1520 size-large\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM-1024x732.png\" alt=\"Screen Shot 2015-03-25 at 7.17.51 AM\" width=\"584\" height=\"417\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM-1024x732.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM-300x214.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM-420x300.png 420w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/03\/Screen-Shot-2015-03-25-at-7.17.51-AM.png 1866w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 3 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0435 4 \u043a\u043d\u043e\u043f\u043a\u0438 \u0441 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438:<\/p><\/blockquote>\n<ul>\n<li>\n<blockquote><p>sin : \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442 sin \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430 \u043d\u0430 \u0432\u0435\u0440\u0448\u0438\u043d\u0435 \u0441\u0442\u044d\u043a\u0430.<\/p><\/blockquote>\n<\/li>\n<li>\n<blockquote><p>cos : \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442 cos \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430 \u043d\u0430 \u0432\u0435\u0440\u0448\u0438\u043d\u0435 \u0441\u0442\u044d\u043a\u0430.<\/p><\/blockquote>\n<\/li>\n<li>\n<blockquote><p>sqrt : \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442 \u221a (\u043a\u0432\u0430\u0434\u0440\u0430\u0442\u043d\u044b\u0439 \u043a\u043e\u0440\u0435\u043d\u044c) \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430 \u043d\u0430 \u0432\u0435\u0440\u0448\u0438\u043d\u0435 \u0441\u0442\u044d\u043a\u0430.<\/p><\/blockquote>\n<\/li>\n<li>\n<blockquote><p>\u03c0: \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442 (\u0430\u0441\u0441\u043e\u0446\u0438\u0438\u0440\u0443\u0435\u0442\u0441\u044f) \u0441 \u0432\u0435\u043b\u0438\u0447\u0438\u043d\u043e\u0439 \u03c0. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440: 3 \u03c0 \u00d7 \u0434\u043e\u043b\u0436\u043d\u043e \u043f\u043e\u043a\u0430\u0437\u0430\u0442\u044c \u043d\u0430\u00a0<b>\u0434\u0438\u0441\u043f\u043b\u0435\u0435 (display)<\/b>\u00a0\u0432\u0430\u0448\u0435\u0433\u043e \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 \u0432\u0435\u043b\u0438\u0447\u0438\u043d\u0443 \u03c0, \u0443\u043c\u043d\u043e\u0436\u0435\u043d\u043d\u0443\u044e \u043d\u0430 3, \u0442\u043e\u0447\u043d\u043e \u0442\u0430\u043a\u0436\u0435 \u00a03\u00a0<b>\u23ce<\/b>\u00a0\u03c0 \u00d7, \u00a0\u0438 \u00a0\u03c0 3 \u00d7 \u0434\u043e\u043b\u0436\u043d\u044b \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u0432\u0435\u043b\u0438\u0447\u0438\u043d\u0443 \u03c0, \u0443\u043c\u043d\u043e\u0436\u0435\u043d\u043d\u0443\u044e \u043d\u0430 3.<\/p><\/blockquote>\n<\/li>\n<\/ul>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0437\u0430\u0433\u043e\u043b\u043e\u0432\u043a\u0438 \u043a \u0431\u0435\u0437\u044b\u043c\u044f\u043d\u043d\u044b\u043c \u043a\u043d\u043e\u043f\u043a\u0430\u043c \u0441\u043f\u0440\u0430\u0432\u0430 \u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u043c, \u0447\u0442\u043e \u0432\u0441\u0435 \u043b\u0438 \u043e\u043d\u0438 \u043f\u043e\u0434\u0441\u043e\u0435\u0434\u0438\u043d\u0435\u043d\u044b \u043a <strong>Action<\/strong>\u00a0<code><strong><span style=\"color: #993366;\">@IBAction func<\/span><\/strong>\u00a0operate(sender:\u00a0<strong><span style=\"color: #993366;\">UIButton<\/span><\/strong>) \u00a0<\/code><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2663 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM.png\" alt=\"Screen Shot 2015-08-16 at 11.12.08 AM\" width=\"1864\" height=\"1196\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM.png 1864w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM-300x192.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM-1024x657.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-11.12.08-AM-468x300.png 468w\" sizes=\"auto, (max-width: 1864px) 100vw, 1864px\" \/><\/a><br \/>\n\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0435\u0449\u0435 \u043e\u0434\u043d\u0443 \u0444\u0443\u043d\u043a\u0446\u0438\u044e <strong><span style=\"color: #0000ff;\">performOperation<\/span><\/strong> \u0434\u043b\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438, \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0435\u0439 \u00a0\u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a\u043e\u043d\u0441\u0442\u0430\u043d\u0442\u044b (\u0432\u0445\u043e\u0434\u043d\u044b\u0435 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u044b \u043d\u0435 \u043d\u0443\u0436\u043d\u044b)<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM.png\" rel=\"attachment wp-att-4097\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4097 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM.png\" alt=\"Screen Shot 2016-03-10 at 4.33.54 PM\" width=\"1206\" height=\"592\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM.png 1206w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM-300x147.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM-768x377.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM-1024x503.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.33.54-PM-500x245.png 500w\" sizes=\"auto, (max-width: 1206px) 100vw, 1206px\" \/><\/a><br \/>\n\u041f\u0435\u0440\u0432\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u043a\u043e\u043d\u0441\u0442\u0430\u043d\u0442 &#8212; \u0443 \u043d\u0435\u0435 \u0432 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0435 <strong><span style=\"color: #0000ff;\">operation<\/span><\/strong> \u043d\u0435\u0442 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432. \u0412\u0442\u043e\u0440\u0430\u044f\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u0443\u043d\u0430\u0440\u043d\u044b\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 &#8212; \u0443 \u043d\u0435\u0435 \u0432 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0435\u00a0<strong><span style=\"color: #0000ff;\">operation<\/span><\/strong>\u00a0\u043e\u0434\u0438\u043d \u0432\u0445\u043e\u0434\u043d\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u043d\u0434. \u0422\u0440\u0435\u0442\u044c\u044f\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u044f \u0434\u043b\u044f \u0431\u0438\u043d\u0430\u0440\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 &#8212; \u0443 \u043d\u0435\u0435 \u0432 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0435\u00a0<strong><span style=\"color: #0000ff;\">operation<\/span><\/strong>\u00a0\u0434\u0432\u0430 \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430.<br \/>\n\u0425\u043e\u0447\u0443 \u043e\u0431\u0440\u0430\u0442\u0438\u0442\u044c \u0432\u0430\u0448\u0435 \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435 \u043d\u0430 \u043d\u0430\u043b\u0438\u0447\u0438\u0435 \u0443 \u0432\u0441\u0435\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0430\u0442\u0440\u0438\u0431\u0443\u0442\u0430\u00a0<strong><span style=\"color: #0000ff;\">@nonobjc<\/span><\/strong>. \u041f\u043e\u043a\u0430 \u043d\u0435 \u043e\u0431\u0440\u0430\u0449\u0430\u0439\u0442\u0435 \u043d\u0430 \u044d\u0442\u043e \u0432\u043d\u0438\u043c\u0430\u043d\u0438\u0435, \u043d\u043e \u0435\u0441\u043b\u0438 \u0432\u0430\u043c \u043e\u0447\u0435\u043d\u044c \u043b\u044e\u0431\u043e\u043f\u044b\u0442\u043d\u043e, \u0442\u043e \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u0442\u0435 \u043f\u043e\u0441\u0442\u00a0<strong><a href=\"https:\/\/bestkora.com\/IosDeveloper\/dopolnenie-k-lektsiya-2-osobennosti-koda-calculator-v-swift-1-2-ili-kak-ne-zastryat-na-etom-meste\/\">&#171;\u0414\u043e\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u043a \u041b\u0435\u043a\u0446\u0438\u0438 2 \u2014 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438 \u043a\u043e\u0434\u0430 Calculator \u0432 Swift 1.2 \u0438 Swift 2.0 \u0438\u043b\u0438 \u043a\u0430\u043a \u043d\u0435 \u00ab\u0437\u0430\u0441\u0442\u0440\u044f\u0442\u044c\u00bb \u043d\u0430 \u044d\u0442\u043e\u043c \u043c\u0435\u0441\u0442\u0435.&#187;<\/a><\/strong><br \/>\n\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u0443\u043a\u0430\u0437\u0430\u043d\u043d\u044b\u0435 \u0432 \u044d\u0442\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 4 \u0444\u0443\u043d\u043a\u0446\u0438\u0438: <strong>sin<\/strong>, <strong>cos<\/strong>, <strong>sqrt<\/strong>,\u00a0<strong>\u03c0<\/strong>.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2671 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM.png\" alt=\"Screen Shot 2015-08-16 at 8.14.27 PM\" width=\"1036\" height=\"648\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM.png 1036w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM-300x188.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM-1024x640.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-8.14.27-PM-480x300.png 480w\" sizes=\"auto, (max-width: 1036px) 100vw, 1036px\" \/><\/a><br \/>\n\u041a\u0440\u043e\u043c\u0435 \u044d\u0442\u043e\u0433\u043e \u0434\u043e\u0431\u0430\u0432\u0438\u043c \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e <strong>\u00b1<\/strong> \u0437\u0430\u043c\u0435\u043d\u044b \u0437\u043d\u0430\u043a\u0430 \u0447\u0438\u0441\u043b\u0443, \u043a\u043e\u0433\u0434\u0430 \u043e\u043d\u043e \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0432\u0432\u0435\u0434\u0435\u043d\u043e, \u0447\u0442\u043e \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442 \u0447\u0430\u0441\u0442\u044c \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 3 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1.<\/p>\n<p>\u0422\u0435\u043f\u0435\u0440\u044c \u043e\u0431\u044a\u044f\u0441\u043d\u0438\u043c, \u043f\u043e\u0447\u0435\u043c\u0443 \u043f\u0440\u0438 \u0432\u044b\u0437\u043e\u0432\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 <strong><span style=\"color: #0000ff;\">performOperation<\/span><\/strong> \u0432\u0445\u043e\u0434\u043d\u044b\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d \u043a\u0430\u043a \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u0435 \u0431\u0435\u0437 \u043a\u0440\u0443\u0433\u043b\u044b\u0445 \u0441\u043a\u043e\u0431\u043e\u043a. \u0414\u0435\u043b\u043e \u0432 \u0442\u043e\u043c, \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u043c \u0432\u0445\u043e\u0434\u043d\u044b\u043c \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u043c \u0434\u043b\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u0435, \u0442\u043e \u0435\u0433\u043e \u043c\u043e\u0436\u043d\u043e \u0432\u044b\u043d\u0435\u0441\u0442\u0438 \u0437\u0430 \u043a\u0440\u0443\u0433\u043b\u044b\u0435 \u0441\u043a\u043e\u0431\u043a\u0438. \u0414\u043b\u044f\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u0439\u00a0<span style=\"color: #0000ff;\"><strong>performOperation<\/strong><\/span>\u00a0\u044d\u0442\u043e \u0435\u0434\u0438\u043d\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0439 \u0432\u0445\u043e\u0434\u043d\u043e\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440, \u043f\u043e\u044d\u0442\u043e\u043c\u0443\u00a0\u0441\u043a\u043e\u0431\u043a\u0438 \u0438\u0441\u0447\u0435\u0437\u0430\u044e\u0442. \u0422\u0430\u043a\u043e\u0439 \u0441\u043f\u043e\u0441\u043e\u0431 \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u0438\u044f \u0432\u044b\u0437\u043e\u0432\u0430 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u0432 <strong>Swift<\/strong> \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f <strong>trailing<\/strong> <strong>closure (\u0445\u0432\u043e\u0441\u0442\u043e\u0432\u043e\u0435 \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u0435)<\/strong>, \u0438 \u043a\u0430\u043a \u0443\u0432\u0438\u0434\u0438\u043c \u0434\u0430\u043b\u044c\u0448\u0435, \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0441\u044f \u043f\u043e\u0432\u0441\u0435\u043c\u0435\u0441\u0442\u043d\u043e.<\/p>\n<p>\u0414\u043b\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u0439 <strong>sin<\/strong>,\u00a0<strong>cos<\/strong>,\u00a0<strong>sqrt\u00a0<\/strong>\u0438\u0437 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0438\u0437\u0432\u0435\u0441\u0442\u0435\u043d \u0442\u0438\u043f \u0432\u0445\u043e\u0434\u043d\u044b\u0445 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u043e\u0432 (<strong><span style=\"color: #0000ff;\">Double<\/span><\/strong>) \u0438 \u0442\u0438\u043f \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f (<span style=\"color: #0000ff;\"><strong>Double<\/strong><\/span>), \u0447\u0442\u043e \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0441\u043e\u0432\u043f\u0430\u0434\u0430\u0435\u0442 \u0441 \u043d\u0430\u0448\u0438\u043c\u0438 \u0442\u0440\u0435\u0431\u043e\u0432\u0430\u043d\u0438\u044f\u043c\u0438, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0434\u043b\u044f \u044d\u0442\u0438\u0445 \u0444\u0443\u043d\u043a\u0446\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0437\u0430\u043c\u044b\u043a\u0430\u043d\u0438\u0435, \u0430 \u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438 \u0432 \u043a\u0440\u0443\u0433\u043b\u044b\u0445 \u0441\u043a\u043e\u0431\u043a\u0430\u0445. \u041e\u0442\u043c\u0435\u0442\u0438\u043c, \u0447\u0442\u043e\u00a0\u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<strong>sin <\/strong>\u0438\u00a0<strong>cos <\/strong>\u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0432\u0445\u043e\u0434\u043d\u043e\u0433\u043e \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u044e\u0442 <strong>\u0443\u0433\u043e\u043b<\/strong>, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0439 \u0432 <strong>\u0440\u0430\u0434\u0438\u0430\u043d\u0430\u0445<\/strong>.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2673 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM.png\" alt=\"Screen Shot 2015-08-16 at 10.16.54 PM\" width=\"1042\" height=\"654\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM.png 1042w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM-300x188.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM-1024x643.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.16.54-PM-478x300.png 478w\" sizes=\"auto, (max-width: 1042px) 100vw, 1042px\" \/><\/a><\/p>\n<p>\u0417\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u044f\u0435\u043c \u00a0\u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u044b\u0435 \u0432 \u044d\u0442\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 \u043a\u043e\u043c\u0431\u0438\u043d\u0430\u0446\u0438\u0438<br \/>\n<strong>3 \u03c0 \u00d7 \u00a0<\/strong><br \/>\n<strong>3 \u21b2 \u03c0 x \u00a0\u00a0<\/strong><br \/>\n<strong>\u03c0 3\u00a0\u00a0x<\/strong><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2682 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM.png\" alt=\"Screen Shot 2015-08-17 at 8.31.37 PM\" width=\"1526\" height=\"1158\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM.png 1526w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM-300x228.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM-1024x777.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.31.37-PM-395x300.png 395w\" sizes=\"auto, (max-width: 1526px) 100vw, 1526px\" \/><\/a><\/p>\n<p>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/p>\n<h2>\u041f\u0443\u043d\u043a\u0442 4 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u043c\u0435\u0442\u043a\u0443 UILabel \u00a0\u043d\u0430 \u0432\u0430\u0448 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c\u0441\u043a\u0438\u0439 \u0438\u043d\u0442\u0435\u0440\u0444\u0435\u0439\u0441, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442 \u0438\u0441\u0442\u043e\u0440\u0438\u044e \u0432\u0432\u043e\u0434\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u043a\u0430\u0436\u0434\u043e\u0433\u043e \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430 \u0438\u00a0\u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438. \u041d\u0430\u0439\u0434\u0438\u0442\u0435 \u043f\u043e\u0434\u0445\u043e\u0434\u044f\u0449\u0435\u0435 \u043c\u0435\u0441\u0442\u043e \u0434\u043b\u044f \u044d\u0442\u043e\u0439 \u0442\u0435\u043a\u0441\u0442\u043e\u0432\u043e\u0439 \u043c\u0435\u0442\u043a\u0438.<\/p><\/blockquote>\n<p>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435\u00a0<strong><em>UILabel<\/em><\/strong>\u00a0\u043d\u0430 \u0432\u0435\u0440\u0445\u043d\u044e\u044e \u0447\u0430\u0441\u0442\u044c \u00a0storyboard, \u0441\u0440\u0430\u0437\u0443 \u0447\u0443\u0442\u044c \u043d\u0438\u0436\u0435 \u043c\u0435\u0442\u043a\u0438 \u0434\u0438\u0441\u043f\u043b\u0435\u044f \u0438 \u0432\u044b\u0440\u0430\u0432\u043d\u044f\u0439\u0442\u0435 \u0435\u0435 \u043f\u043e \u0433\u043e\u043b\u0443\u0431\u044b\u043c \u043d\u0430\u043f\u0440\u0430\u0432\u043b\u044f\u044e\u0449\u0438\u043c \u043b\u0438\u043d\u0438\u044f\u043c \u0441\u043b\u0435\u0432\u0430 \u0438 \u0441\u0432\u0435\u0440\u0445\u0443. \u0417\u0430\u0434\u0430\u0439\u0442\u0435 \u0445\u0432\u043e\u0441\u0442\u043e\u0432\u043e\u0439, \u043b\u0438\u0434\u0438\u0440\u0443\u044e\u0449\u0438\u0439 \u0437\u0430\u0437\u043e\u0440\u044b \u0438 \u0432\u0435\u0440\u0442\u0438\u043a\u0430\u043b\u044c\u043d\u044b\u0439 \u0437\u0430\u0437\u043e\u0440 \u043c\u0435\u0436\u0434\u0443 \u043c\u0435\u0442\u043a\u0430\u043c\u0438. \u041a\u043d\u043e\u043f\u043a\u0438 \u043d\u0443\u0436\u043d\u043e \u0440\u0430\u0437\u043c\u0435\u0441\u0442\u0438\u0442\u044c \u0437\u0430\u043d\u043e\u0432\u043e: \u043b\u0438\u0431\u043e \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u0442\u043e\u0434\u0438\u043a\u0438 &#171;\u0441\u0435\u0442\u043a\u0438&#187; \u0438\u043b\u0438 \u043f\u0440\u043e\u0441\u0442\u043e \u0432 \u0432\u0435\u0440\u0445\u043d\u0438\u0439 \u043b\u0435\u0432\u044b\u0439 \u0443\u0433\u043e\u043b.<\/p>\n<p>\u0421\u043e\u0437\u0434\u0430\u0435\u043c <strong>outlet<\/strong> \u0434\u043b\u044f \u043d\u043e\u0432\u043e\u0439 \u043c\u0435\u0442\u043a\u0438 \u0441 \u0438\u043c\u0435\u043d\u0435\u043c<strong><span style=\"color: #0000ff;\"> history<\/span><\/strong><\/p>\n<p><strong><span style=\"color: #993366;\"><code class=\"swift keyword\">@IBOutlet<\/code>\u00a0<code class=\"swift keyword\">weak<\/code>\u00a0<code class=\"swift keyword\">var<\/code><\/span><\/strong>\u00a0<code class=\"swift plain\">history:\u00a0<\/code><strong><span style=\"color: #993366;\"><code class=\"swift color2\">UILabel<\/code><\/span><\/strong><code class=\"swift plain\">!<\/code><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2674 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM.png\" alt=\"Screen Shot 2015-08-16 at 10.29.26 PM\" width=\"1914\" height=\"622\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM.png 1914w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM-300x97.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM-1024x333.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-16-at-10.29.26-PM-500x162.png 500w\" sizes=\"auto, (max-width: 1914px) 100vw, 1914px\" \/><\/a><\/p>\n<div>\u00a0\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u043c \u043c\u0435\u0442\u043e\u0434 <strong><span style=\"color: #0000ff;\">addHistory<\/span><\/strong> \u0434\u043b\u044f \u043d\u0430\u043a\u043e\u043f\u043b\u0435\u043d\u0438\u044f \u0432\u0432\u043e\u0434\u0430 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432 \u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439 \u0432 \u0442\u0435\u043a\u0441\u0442\u0435 \u043c\u0435\u0442\u043a\u0438\u00a0<strong><span style=\"color: #0000ff;\">history<\/span><\/strong>:<\/div>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2677 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png\" alt=\"Screen Shot 2015-08-17 at 5.26.20 PM\" width=\"1006\" height=\"158\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png 1006w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-300x47.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-1000x158.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-500x79.png 500w\" sizes=\"auto, (max-width: 1006px) 100vw, 1006px\" \/><\/a><\/p>\n<p>\u042d\u0442\u043e\u0442 \u043c\u0435\u0442\u043e\u0434 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u0441 \u0443\u0447\u0435\u0442\u043e\u043c \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 2 \u044d\u0442\u043e\u0433\u043e \u0417\u0430\u0434\u0430\u043d\u0438\u044f, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0442\u044c \u0437\u043d\u0430\u043a \u0440\u0430\u0432\u0435\u043d\u0441\u0442\u0432\u0430 &#171;<strong>=<\/strong>&#187; \u043f\u0440\u0438 \u043d\u0430\u0436\u0430\u0442\u0438\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u043c \u043d\u0430 \u043b\u044e\u0431\u043e\u0439 \u043a\u043b\u0430\u0432\u0438\u0448\u0435 \u0441 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u043c\u0438. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u043c, \u0447\u0442\u043e \u0437\u043d\u0430\u043a &#171;<strong>=<\/strong>&#187; \u043c\u043e\u0436\u0435\u0442 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u0442\u0435\u043a\u0441\u0442\u0435 \u043c\u0435\u0442\u043a\u0438 \u043e\u0442 \u043f\u0440\u0435\u0434\u044b\u0434\u0443\u0449\u0435\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438, \u0438 \u0443\u0431\u0438\u0440\u0430\u0435\u043c \u0435\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u0438\u0437\u0431\u0435\u0436\u0430\u0442\u044c \u043f\u043e\u0432\u0442\u043e\u0440\u043d\u043e\u0433\u043e \u0443\u043f\u043e\u0442\u0440\u0435\u0431\u043b\u0435\u043d\u0438\u044f.<br \/>\n\u041c\u0435\u0442\u043a\u0430 <span style=\"color: #0000ff;\"><strong>history<\/strong><\/span>\u00a0\u0444\u043e\u0440\u043c\u0438\u0440\u0443\u0435\u0442\u0441\u044f \u043f\u0440\u0438 \u0432\u0432\u043e\u0434\u0435 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u0430:<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM.png\" rel=\"attachment wp-att-4098\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4098 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM.png\" alt=\"Screen Shot 2016-03-10 at 4.51.59 PM\" width=\"1044\" height=\"194\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM.png 1044w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM-300x56.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM-768x143.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM-1024x190.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-4.51.59-PM-500x93.png 500w\" sizes=\"auto, (max-width: 1044px) 100vw, 1044px\" \/><\/a><br \/>\n\u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438:<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2680 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png\" alt=\"Screen Shot 2015-08-17 at 5.40.40 PM\" width=\"1010\" height=\"616\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png 1010w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM-300x183.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM-492x300.png 492w\" sizes=\"auto, (max-width: 1010px) 100vw, 1010px\" \/><\/a><br \/>\n\u0417\u0430\u043f\u0443\u0441\u043a\u0430\u0435\u043c. \u041f\u043e\u043b\u0443\u0447\u0430\u0435\u043c \u0442\u0440\u0435\u0431\u0443\u0435\u043c\u044b\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.42.36-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2684 size-large\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.42.36-PM-986x1024.png\" alt=\"Screen Shot 2015-08-17 at 8.42.36 PM\" width=\"584\" height=\"607\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.42.36-PM-986x1024.png 986w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.42.36-PM-289x300.png 289w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.42.36-PM.png 1132w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a><br \/>\n<strong>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435<\/strong>. \u0423\u0441\u0442\u0430\u043d\u043e\u0432\u043b\u0435\u043d\u043d\u0430\u044f \u0442\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u043c\u0435\u0442\u043a\u0430<strong>\u00a0<span style=\"color: #0000ff;\">history<\/span><\/strong>\u00a0\u043f\u0440\u0438 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0438 \u0432 \u043d\u0435\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0441\u0436\u0438\u043c\u0430\u0435\u0442\u0441\u044f, \u0438 \u0446\u0438\u0444\u0440\u043e\u0432\u0430\u044f \u043a\u043b\u0430\u0432\u0438\u0430\u0442\u0443\u0440\u0430 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u043f\u043e\u0434\u043d\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u0432\u0432\u0435\u0440\u0445, \u0430 \u043f\u0440\u0438 \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u0438 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u0432 \u043c\u0435\u0442\u043a\u0435\u00a0<strong><span style=\"color: #0000ff;\">history<\/span>\u00a0<\/strong>\u0446\u0438\u0444\u0440\u043e\u0432\u0430\u044f \u043a\u043b\u0430\u0432\u0438\u0430\u0442\u0443\u0440\u0430 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430 \u043d\u0435\u043c\u043d\u043e\u0433\u043e \u043f\u043e\u0434\u043d\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u0432\u043d\u0438\u0437. \u042d\u0442\u043e \u043d\u0435 \u043e\u0447\u0435\u043d\u044c \u0445\u043e\u0440\u043e\u0448\u043e. \u041d\u0443\u0436\u043d\u043e \u043f\u043e\u043c\u0435\u0441\u0442\u0438\u0442\u044c \u043f\u0440\u043e\u0431\u0435\u043b &#187; &#187; ( \u0438\u043c\u0435\u043d\u043d\u043e &#187; &#171;, \u0430 \u043d\u0435 &#171;&#187;) \u0432 \u043c\u0435\u0442\u043a\u0443 \u043d\u0430 \u00a0storyboard.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2685 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM.png\" alt=\"Screen Shot 2015-08-17 at 8.46.01 PM\" width=\"1254\" height=\"878\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM.png 1254w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM-300x210.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM-1024x717.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-8.46.01-PM-428x300.png 428w\" sizes=\"auto, (max-width: 1254px) 100vw, 1254px\" \/><\/a><br \/>\n\u0423\u0441\u0435\u043a\u0430\u0435\u043c \u0433\u043e\u043b\u043e\u0432\u043d\u0443\u044e \u0447\u0430\u0441\u0442\u044c \u0441\u0442\u0440\u043e\u043a\u0438 <strong><span style=\"color: #0000ff;\">history<\/span><\/strong>, \u0447\u0442\u043e\u0431\u044b \u0432\u0438\u0434\u0435\u0442\u044c \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0435 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b \u0432\u0432\u043e\u0434\u0430 \u043e\u043f\u0440\u0430\u043d\u0434\u043e\u0432 \u0438 \u043e\u043f\u0435\u0440\u0430\u0442\u043e\u0440\u043e\u0432.<br \/>\n\u0415\u0441\u0442\u044c \u0435\u0449\u0435 \u043e\u0434\u0438\u043d \u043c\u043e\u043c\u0435\u043d\u0442 &#8212; \u043b\u0438\u0434\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u043d\u0443\u043b\u0438. \u0421\u0435\u0439\u0447\u0430\u0441 \u0432\u043e\u0437\u043c\u043e\u0436\u0435\u043d \u0432\u0432\u043e\u0434 \u0447\u0438\u0441\u0435\u043b \u0441 \u043b\u0438\u0434\u0438\u0440\u0443\u044e\u0449\u0438\u043c\u0438 \u043d\u0443\u043b\u044f\u043c\u0438 (\u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u201c000\u201d \u0438\u043b\u0438 \u201c0367\u201d).<br \/>\n\u042f \u043f\u0440\u0435\u0434\u043b\u0430\u0433\u0430\u044e \u0434\u043b\u044f \u0443\u043d\u0438\u0447\u0442\u043e\u0436\u0435\u043d\u0438\u044f \u043b\u0438\u0434\u0438\u0440\u0443\u044e\u0449\u0438\u0445 \u043d\u0443\u043b\u0435\u0439 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u043a\u043e\u0434<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1139 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM.png\" alt=\"Screen Shot 2015-02-11 at 7.23.41 PM\" width=\"1146\" height=\"458\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM.png 1146w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM-300x120.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM-1024x409.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-11-at-7.23.41-PM-500x200.png 500w\" sizes=\"auto, (max-width: 1146px) 100vw, 1146px\" \/><\/a><\/p>\n<h2>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/h2>\n<h2>\u041f\u0443\u043d\u043a\u0442 5 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u044b\u0439<\/h2>\n<blockquote><p>\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 \u043a\u043d\u043e\u043f\u043a\u0443 \u201cC\u201d, \u00a0\u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0431\u0443\u0434\u0435\u0442 \u0447\u0438\u0441\u0442\u0438\u0442\u044c \u0432\u0441\u0435 \u00a0(\u0432\u0430\u0448 \u0434\u0438\u0441\u043f\u043b\u0435\u0439 \u0432\u0432\u043e\u0434\u0430, \u043d\u043e\u0432\u0443\u044e \u043c\u0435\u0442\u043a\u0443, \u043a\u043e\u0442\u043e\u0440\u0443\u044e \u0432\u044b \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0442\u043e \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438). \u041f\u0440\u0438 \u043d\u0430\u0436\u0430\u0442\u0438\u0438 \u043a\u043d\u043e\u043f\u043a\u0438 \u201cC\u201d. \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0434\u043e\u043b\u0436\u0435\u043d \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u0442\u0430\u043a\u043e\u043c \u0436\u0435 \u0441\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u043a\u0430\u043a \u043f\u0440\u0438 \u0441\u0442\u0430\u0440\u0442\u0435.<\/p><\/blockquote>\n<p>\u0414\u043e\u0431\u0430\u0432\u043b\u044f\u044e \u0441\u043d\u0438\u0437\u0443 \u0435\u0449\u0435 \u0440\u044f\u0434 \u043a\u043d\u043e\u043f\u043e\u043a \u0438 \u043e\u0434\u043d\u043e\u0439 \u0438\u0437 \u043d\u0438\u0445 \u0434\u0430\u044e \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 &#171;\u0421&#187;. \u0421\u043e\u0437\u0434\u0430\u0435\u043c\u00a0<strong>Action\u00a0<span style=\"color: #0000ff;\">clearAll<\/span><\/strong>. \u0412\u043d\u0443\u0442\u0440\u0438 \u043c\u0435\u0442\u043e\u0434\u0430 \u043f\u043e\u043c\u0435\u0449\u0430\u0435\u043c \u043a\u043e\u0434 \u0438 \u043d\u0435 \u0437\u0430\u0431\u044b\u0432\u0430\u0435\u043c \u043e\u0447\u0438\u0441\u0442\u0438\u0442\u044c \u043c\u0435\u0442\u043a\u0443 <strong><span style=\"color: #0000ff;\">history<\/span><\/strong>, \u043d\u043e \u043d\u0435 \u043f\u0443\u0441\u0442\u043e\u0439 \u0441\u0442\u0440\u043e\u043a\u043e\u0439 <strong>&#171;&#187;<\/strong>, \u0430 \u043f\u0440\u043e\u0431\u0435\u043b\u043e\u043c <strong>&#187; &#171;<\/strong>.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2699 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM.png\" alt=\"Screen Shot 2015-08-19 at 10.24.40 AM\" width=\"1704\" height=\"1350\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM.png 1704w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM-300x238.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM-1024x811.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.24.40-AM-379x300.png 379w\" sizes=\"auto, (max-width: 1704px) 100vw, 1704px\" \/><\/a><\/p>\n<h2>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/h2>\n<h2>\u041f\u0443\u043d\u043a\u0442 1 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 (extra credit)<\/h2>\n<blockquote><p>\u0414\u0430\u0439\u0442\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043d\u0430\u0436\u0438\u043c\u0430\u0442\u044c \u043a\u043d\u043e\u043f\u043a\u0443 \u00a0\u201cbackspace\u201d \u0435\u0441\u043b\u0438 \u043e\u043d \u0432\u0432\u0435\u043b \u043d\u0435\u0432\u0435\u0440\u043d\u0443\u044e \u0446\u0438\u0444\u0440\u0443. \u042d\u0442\u043e \u0432\u043e\u0432\u0441\u0435 \u043d\u0435 \u043a\u043d\u043e\u043f\u043a\u0430 \u201cundo,\u201d \u0442\u0430\u043a \u0447\u0442\u043e \u0435\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0436\u0430\u043b \u043d\u0435\u0432\u0435\u0440\u043d\u0443\u044e \u043a\u043d\u043e\u043f\u043a\u0443 \u0441 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0435\u0439 , \u0442\u043e \u0435\u0433\u043e \u0436\u0434\u0435\u0442 \u043d\u0435\u0443\u0434\u0430\u0447\u0430! \u0412\u0430\u043c \u0440\u0435\u0448\u0430\u0442\u044c \u043a\u0430\u043a \u0432\u044b \u0431\u0443\u0434\u0435\u0442\u0435 \u0440\u0430\u0437\u0440\u0443\u043b\u0438\u0432\u0430\u0442\u044c \u0441\u043b\u0443\u0447\u0430\u0439, \u043a\u043e\u0433\u0434\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043a\u043d\u043e\u043f\u043a\u043e\u0439 \u201cbackspace\u201d \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u0443\u0434\u0430\u043b\u0438\u043b \u0447\u0438\u0441\u043b\u043e \u0438 \u0432\u0441\u0435 \u0435\u0449\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430 , \u043d\u043e \u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0442\u044c \u0434\u0438\u0441\u043f\u043b\u0435\u0439 (display) \u0430\u0431\u0441\u043e\u043b\u044e\u0442\u043d\u043e \u043f\u0443\u0441\u0442\u044b\u043c \u0431\u044b\u043b\u043e \u0431\u044b \u043d\u0435 \u043e\u0447\u0435\u043d\u044c \u0434\u0440\u0443\u0436\u0435\u043b\u044e\u0431\u043d\u043e. \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<strong>\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/strong><\/p><\/blockquote>\n<p>\u041e\u0434\u043d\u043e\u0439 \u0438\u0437 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u043d\u0438\u0437\u0443 \u043a\u043d\u043e\u043f\u043e\u043a \u0434\u0430\u044e \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 &#171;<strong>back<\/strong>&#171;. \u0421\u043e\u0437\u0434\u0430\u0435\u043c\u00a0<strong>Action\u00a0<span style=\"color: #3366ff;\">backSpace<\/span><\/strong><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2703 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM.png\" alt=\"Screen Shot 2015-08-19 at 2.13.51 PM\" width=\"1996\" height=\"734\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM.png 1996w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM-300x110.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM-1024x377.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.13.51-PM-500x184.png 500w\" sizes=\"auto, (max-width: 1996px) 100vw, 1996px\" \/><\/a><br \/>\n\u0412\u043d\u0443\u0442\u0440\u0438 \u043c\u0435\u0442\u043e\u0434\u0430 \u043f\u043e\u043c\u0435\u0449\u0430\u0435\u043c \u043a\u043e\u0434<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2704 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM.png\" alt=\"Screen Shot 2015-08-19 at 2.18.22 PM\" width=\"1004\" height=\"254\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM.png 1004w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM-300x76.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM-1000x254.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-2.18.22-PM-500x126.png 500w\" sizes=\"auto, (max-width: 1004px) 100vw, 1004px\" \/><\/a><\/p>\n<p>\u042d\u0442\u043e\u0442 \u043c\u0435\u0442\u043e\u0434 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u0442\u043e\u043b\u044c\u043a\u043e \u0435\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u043d\u0430\u0431\u043e\u0440\u0430 \u0447\u0438\u0441\u043b\u0430.<\/p>\n<h2>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/h2>\n<h2>\u041f\u0443\u043d\u043a\u0442 2 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 (extra credit)<\/h2>\n<blockquote><p>\u041a\u043e\u0433\u0434\u0430 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0436\u0438\u043c\u0430\u0435\u0442 \u043a\u043d\u043e\u043f\u043a\u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 (operation button), \u0440\u0430\u0437\u043c\u0435\u0441\u0442\u0438\u0442\u0435 \u0437\u043d\u0430\u043a p\u0430\u0432\u043d\u043e = \u0432 \u043a\u043e\u043d\u0446\u0435 \u0442\u0435\u043a\u0441\u0442\u043e\u0432\u043e\u0439 \u043c\u0435\u0442\u043a\u0438\u00a0<b>UILabel<\/b>, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432 \u041e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u0437\u0430\u0434\u0430\u043d\u0438\u0438 ( #4). \u0422\u0430\u043a\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0441\u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u043d\u044f\u0442\u044c, \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u0438 \u0447\u0438\u0441\u043b\u043e \u043d\u0430\u00a0<b>\u0434\u0438\u0441\u043f\u043b\u0435\u0435 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430<\/b>\u00a0\u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0438\u043b\u0438 \u044d\u0442\u043e \u0447\u0438\u0441\u043b\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0442\u043e \u0432\u0432\u0435\u043b \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c. \u041d\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0439\u0442\u0435 \u0437\u043d\u0430\u043a\u0443 \u201c=\u201d \u043c\u043d\u043e\u0433\u043e\u043a\u0440\u0430\u0442\u043d\u043e \u043f\u043e\u044f\u0432\u043b\u044f\u0442\u044c\u0441\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u043c\u0435\u0442\u043a\u0438\u00a0<b>UILabel<\/b>.<\/p><\/blockquote>\n<p>\u042d\u0442\u043e\u0442 \u043f\u0443\u043d\u043a\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d \u0432 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u043f\u0443\u043d\u043a\u0442\u0435 4. \u041c\u044b \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438 \u0437\u043d\u0430\u043a &#171;=&#187; \u043f\u0440\u0438 \u043d\u0430\u0436\u0430\u0442\u0438\u0438 \u043a\u043d\u043e\u043f\u043a\u0438 \u0441 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0435\u0439<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2680 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png\" alt=\"Screen Shot 2015-08-17 at 5.40.40 PM\" width=\"1010\" height=\"616\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM.png 1010w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM-300x183.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.40.40-PM-492x300.png 492w\" sizes=\"auto, (max-width: 1010px) 100vw, 1010px\" \/><\/a><br \/>\n\u0418 \u043f\u0440\u0435\u0434\u043e\u0442\u0432\u0440\u0430\u0442\u0438\u043b\u0438 \u043c\u043d\u043e\u0433\u043e\u043a\u0440\u0430\u0442\u043d\u043e\u0435 \u0435\u0433\u043e \u043f\u043e\u044f\u0432\u043b\u0435\u043d\u0438\u0435 \u0432 \u043c\u0435\u0442\u043e\u0434\u0435 <strong><span style=\"color: #0000ff;\">addHistory<\/span><\/strong><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2677 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png\" alt=\"Screen Shot 2015-08-17 at 5.26.20 PM\" width=\"1006\" height=\"158\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM.png 1006w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-300x47.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-1000x158.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-17-at-5.26.20-PM-500x79.png 500w\" sizes=\"auto, (max-width: 1006px) 100vw, 1006px\" \/><\/a><br \/>\n\u0412 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0435\u00a0\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u0441\u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u043d\u044f\u0442\u044c, \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043b\u0438 \u0447\u0438\u0441\u043b\u043e \u043d\u0430\u00a0<b>\u0434\u0438\u0441\u043f\u043b\u0435\u0435 \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440\u0430<\/b>\u00a0\u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u043c \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439 \u0438\u043b\u0438 \u044d\u0442\u043e \u0447\u0438\u0441\u043b\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0447\u0442\u043e \u0432\u0432\u0435\u043b \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1155 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM.png\" alt=\"Screen Shot 2015-02-12 at 1.50.41 PM\" width=\"1534\" height=\"1184\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM.png 1534w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM-300x232.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM-1024x790.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-1.50.41-PM-389x300.png 389w\" sizes=\"auto, (max-width: 1534px) 100vw, 1534px\" \/><\/a><\/p>\n<h2>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/h2>\n<h2>\u041f\u0443\u043d\u043a\u0442 3 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 (extra credit)<\/h2>\n<blockquote><p>\u00a0\u0414\u043e\u0431\u0430\u0432\u044c\u0442\u0435 +\/- \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044e, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043c\u0435\u043d\u044f\u0435\u0442 \u0437\u043d\u0430\u043a \u0447\u0438\u0441\u043b\u0430 \u043d\u0430\u00a0<b>\u0434\u0438\u0441\u043f\u043b\u0435\u0435 (in the display)<\/b>. \u0411\u0443\u0434\u044c\u0442\u0435 \u0431\u043e\u043b\u0435\u0435 \u0432\u043d\u0438\u043c\u0430\u0442\u0435\u043b\u044c\u043d\u044b \u0441 \u044d\u0442\u0438\u043c. \u0415\u0441\u043b\u0438 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044c \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430, \u0432\u044b \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e, \u0437\u0430\u0445\u043e\u0442\u0438\u0442\u0435 \u0438\u0437\u043c\u0435\u043d\u0438\u0442\u044c \u0437\u043d\u0430\u043a \u044d\u0442\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u0438 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u0435\u043c\u0443 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0442\u044c \u0435\u0433\u043e \u0432\u0432\u043e\u0434, \u043d\u0435 \u043f\u0440\u0438\u0431\u0435\u0433\u0430\u0439\u0442\u0435 \u043a \u201c\u043f\u0440\u0438\u043d\u0443\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u043c\u0443\u201d \u201center\u201d \u043a\u0430\u043a \u0432 \u0434\u0440\u0443\u0433\u0438\u0445 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f\u0445. \u041d\u043e \u0435\u0441\u043b\u0438 \u0432\u044b \u043d\u0435 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0435\u0441\u044c \u0432 \u0441\u0435\u0440\u0435\u0434\u0438\u043d\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430, \u0442\u043e \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043f\u0440\u043e\u0441\u0442\u043e \u043a\u0430\u043a \u043b\u044e\u0431\u0430\u044f \u0434\u0440\u0443\u0433\u0430\u044f \u0443\u043d\u0430\u0440\u043d\u0430\u044f \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f ( \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, sqrt).<\/p><\/blockquote>\n<p>\u041e\u0434\u043d\u043e\u0439 \u0438\u0437 \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u0441\u043d\u0438\u0437\u0443 \u043a\u043d\u043e\u043f\u043e\u043a \u0434\u0430\u044e \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 &#171;<b>\u00b1<\/b>&#171;. \u0421\u043e\u0437\u0434\u0430\u0435\u043c\u00a0<strong>Action\u00a0<span style=\"color: #3366ff;\">\u00a0plusMinus<\/span><\/strong><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2690 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM.png\" alt=\"Screen Shot 2015-08-18 at 11.27.00 AM\" width=\"2086\" height=\"454\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM.png 2086w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM-300x65.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM-1024x223.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.27.00-AM-500x109.png 500w\" sizes=\"auto, (max-width: 2086px) 100vw, 2086px\" \/><\/a><br \/>\n\u0412\u043d\u0443\u0442\u0440\u0438 \u043c\u0435\u0442\u043e\u0434\u0430 \u043f\u043e\u043c\u0435\u0449\u0430\u0435\u043c \u043a\u043e\u0434<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.29.41-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2691 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.29.41-AM.png\" alt=\"Screen Shot 2015-08-18 at 11.29.41 AM\" width=\"1006\" height=\"310\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.29.41-AM.png 1006w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.29.41-AM-300x92.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.29.41-AM-500x154.png 500w\" sizes=\"auto, (max-width: 1006px) 100vw, 1006px\" \/><\/a><br \/>\n\u041a\u043e\u0434 \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e\u0439: \u0435\u0441\u043b\u0438 \u0432\u044b \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0435\u0441\u044c \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u0435 \u0432\u0432\u043e\u0434\u0430 \u0447\u0438\u0441\u043b\u0430 (<strong><span style=\"color: #0000ff;\">userIsInTheMiddleOfTypingANumber<\/span>\u00a0<\/strong>), \u0442\u043e \u0432\u044b \u043c\u0435\u043d\u044f\u0435\u0442\u0435 \u0437\u043d\u0430\u043a. \u0415\u0441\u043b\u0438 \u043d\u0435\u0442, \u0442\u043e \u043f\u0435\u0440\u0435\u0441\u044b\u043b\u0430\u0435\u0442\u0435 \u0432\u0430\u0448\u0443 \u043a\u043d\u043e\u043f\u043a\u0443 \u043c\u0435\u0442\u043e\u0434\u0443 <strong><span style=\"color: #0000ff;\">operate<\/span><\/strong>. \u041d\u043e \u0434\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b\u00a0\u00a0&#171;<b>\u00b1<\/b>&#187; \u0440\u0430\u0431\u043e\u0442\u0430\u043b\u0430 \u043a\u0430\u043a \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f, \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c\u00a0\u0435\u0435 \u0432 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.31.35-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2692 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.31.35-AM.png\" alt=\"Screen Shot 2015-08-18 at 11.31.35 AM\" width=\"1008\" height=\"620\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.31.35-AM.png 1008w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.31.35-AM-300x185.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-18-at-11.31.35-AM-488x300.png 488w\" sizes=\"auto, (max-width: 1008px) 100vw, 1008px\" \/><\/a><\/p>\n<h2>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430\u00a0<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/h2>\n<blockquote>\n<h1>\u00a0\u041f\u0443\u043d\u043a\u0442 4 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 (extra credit)<\/h1>\n<p>\u0418\u0437\u043c\u0435\u043d\u0438\u0442\u0435 \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u043c\u0443\u044e \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u0443\u044e \u044d\u043a\u0437\u0435\u043c\u043f\u043b\u044f\u0440\u0430 \u043a\u043b\u0430\u0441\u0441\u0430\u00a0<span style=\"color: #0000ff;\"><strong>displayValue\u00a0<\/strong><\/span>\u0442\u0430\u043a, \u0447\u0442\u043e\u0431\u044b \u043e\u043d\u0430 \u0431\u044b\u043b\u0430 Optional\u00a0<strong><span style=\"color: #993366;\">Double<\/span><\/strong>, a \u043d\u0435\u00a0<span style=\"color: #993366;\"><strong>Double<\/strong><\/span>. \u0415\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u0434\u043e\u043b\u0436\u043d\u043e \u0431\u044b\u0442\u044c\u00a0<strong><span style=\"color: #993366;\">nil<\/span><\/strong>\u00a0\u0435\u0441\u043b\u0438 \u0441\u043e\u0434\u0435\u0440\u0436\u0438\u043c\u043e\u0435\u00a0<span style=\"color: #0000ff;\"><strong>display.text<\/strong>\u00a0<\/span>\u043d\u0435 \u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0438\u043d\u0442\u0435\u0440\u043f\u0440\u0435\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043e \u043a\u0430\u043a\u00a0<span style=\"color: #993366;\"><strong>Double\u00a0<\/strong><\/span>(\u0432\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0434\u043e\u043a\u0443\u043c\u0435\u043d\u0442\u0430\u0446\u0438\u044e \u0434\u043b\u044f \u043f\u043e\u043d\u0438\u043c\u0430\u043d\u0438\u044f \u043a\u043e\u0434\u0430\u00a0<strong><span style=\"color: #993366;\">NSNumberFormatter<\/span><\/strong>\u00a0). \u0423\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0430 \u044d\u0442\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0432\u00a0<strong><span style=\"color: #993366;\">ni<\/span><\/strong>l \u0434\u043e\u043b\u0436\u043d\u0430 \u043e\u0447\u0438\u0449\u0430\u0442\u044c<span style=\"color: #0000ff;\"><strong>\u00a0display<\/strong><\/span>.<\/p><\/blockquote>\n<p>\u0414\u0435\u043b\u0430\u0435\u043c\u00a0\u00a0<strong><span style=\"color: #0000ff;\">displayValue<\/span>\u00a0<\/strong>\u0442\u0430\u043a, \u0447\u0442\u043e\u0431\u044b \u043e\u043d\u0430 \u0431\u044b\u043b\u0430 Optional\u00a0<span style=\"color: #993366;\"><strong>Double &#8212;\u00a0Double?<\/strong><\/span>, a \u043d\u0435\u00a0<span style=\"color: #993366;\"><strong>Double<\/strong><\/span>.<br \/>\n\u041d\u0430\u0447\u043d\u0435\u043c \u0441<code><strong><span style=\"color: #993366;\">\u00a0get<\/span><\/strong>\u00a0{ \u00a0}<\/code><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1161 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM.png\" alt=\"Screen Shot 2015-02-12 at 4.47.43 PM\" width=\"1052\" height=\"374\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM.png 1052w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM-300x107.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM-1024x364.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-4.47.43-PM-500x178.png 500w\" sizes=\"auto, (max-width: 1052px) 100vw, 1052px\" \/><\/a><br \/>\n\u0417\u0430\u043c\u0435\u0447\u0430\u0435\u043c, \u0447\u0442\u043e \u0442\u0435\u043a\u0441\u0442 \u043d\u0430\u0448\u0435\u0433\u043e \u0434\u0438\u0441\u043f\u043b\u0435\u044f \u0442\u043e\u0436\u0435\u00a0Optional, \u043d\u043e \u00a0<span style=\"color: #993366;\"><strong>String &#8212;\u00a0String?<\/strong><span style=\"color: #000000;\">, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432\u043d\u0430\u0447\u0430\u043b\u0435 &#171;\u0440\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u0435\u043c&#187;\u00a0<span style=\"color: #0000ff;\"><strong>display.text<\/strong><span style=\"color: #000000;\">\u00a0\u0438 \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c<\/span>\u00a0<strong>displayText<\/strong><span style=\"color: #000000;\">, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u043c\u0435\u0435\u0442 \u0442\u0438\u043f\u00a0<span style=\"color: #993366;\"><strong>String<\/strong><\/span>.\u00a0\u0417\u0430\u0442\u0435\u043c \u043f\u043e\u0434\u0430\u0435\u043c\u00a0<strong><span style=\"color: #0000ff;\">displayText<\/span>\u00a0<\/strong>\u043a\u0430\u043a \u0432\u0445\u043e\u0434\u043d\u043e\u0439 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440 \u043d\u0430 \u0432\u0445\u043e\u0434\u00a0<span style=\"color: #993366;\"><strong>NSNumberFormatter<\/strong><\/span>\u00a0.<\/span><\/span><\/span><\/span><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1162 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM.png\" alt=\"Screen Shot 2015-02-12 at 5.11.59 PM\" width=\"1364\" height=\"536\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM.png 1364w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM-300x118.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM-1024x402.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.11.59-PM-500x196.png 500w\" sizes=\"auto, (max-width: 1364px) 100vw, 1364px\" \/><\/a><br \/>\n&#171;P\u0430\u0437\u0432\u0435\u0440\u0442\u044b\u0432\u0430\u0435\u043c&#187;<span style=\"color: #000000;\">\u00a0\u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f\u00a0<\/span><span style=\"color: #000000;\">\u00a0<span style=\"color: #993366;\"><strong>NSNumberFormatter<\/strong><\/span>\u00a0\u0438 \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c<\/span><span style=\"color: #0000ff;\">\u00a0<\/span><strong style=\"color: #0000ff;\">displayNumber<\/strong><span style=\"color: #000000;\">, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0438\u043c\u0435\u0435\u0442 \u0442\u0438\u043f\u00a0<\/span><strong><span style=\"color: #800080;\"><span style=\"color: #993366;\">NSNumber<\/span><\/span><\/strong><span style=\"color: #000000;\">.\u00a0<\/span><br \/>\n\u0414\u0435\u043b\u0430\u0435\u043c \u0435\u0433\u043e\u00a0<span style=\"color: #800080;\"><strong>Double\u00a0<\/strong><\/span>\u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u043c.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1163 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM.png\" alt=\"Screen Shot 2015-02-12 at 5.19.17 PM\" width=\"1218\" height=\"242\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM.png 1218w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM-300x60.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM-1024x203.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-12-at-5.19.17-PM-500x99.png 500w\" sizes=\"auto, (max-width: 1218px) 100vw, 1218px\" \/><\/a><br \/>\n<span style=\"text-decoration: underline;\"><em><strong>\u041f\u0440\u0438\u043c\u0435\u0447\u0430\u043d\u0438\u0435.<\/strong><\/em><\/span> \u0420<span style=\"color: #000000;\">\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f\u00a0<\/span><span style=\"color: #000000;\">\u00a0<span style=\"color: #993366;\"><strong>NSNumberFormatter<\/strong><\/span>\u00a0\u043c\u043e\u0436\u043d\u043e \u043d\u0435 \u0440\u0430\u0437\u0432\u043e\u0440\u0430\u0447\u0438\u0432\u0430\u0442\u044c, \u0430 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c \u0442\u0430\u043a \u043d\u0430\u0437\u044b\u0432\u0430\u0435\u043c\u0443\u044e <strong>chaining<\/strong> <strong>Optionals<\/strong> (\u0446\u0435\u043f\u043e\u0447\u043a\u0443\u00a0<strong>Optionals<\/strong>), \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u0432 \u0417\u0430\u0434\u0430\u043d\u0438\u0438 2.\u00a0<\/span><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-1183 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM.png\" alt=\"Screen Shot 2015-02-13 at 7.34.59 AM\" width=\"1156\" height=\"206\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM.png 1156w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM-300x53.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM-1024x182.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2015-02-13-at-7.34.59-AM-500x89.png 500w\" sizes=\"auto, (max-width: 1156px) 100vw, 1156px\" \/><\/a><br \/>\n\u041f\u0435\u0440\u0435\u0439\u0434\u0435\u043c \u043a\u00a0<strong><span style=\"color: #993366;\">set<\/span><\/strong>\u00a0{ \u00a0}. \u041a\u043e\u0434 \u0434\u043e\u0441\u0442\u0430\u0442\u043e\u0447\u043d\u043e \u043f\u0440\u043e\u0441\u0442\u043e\u0439 \u0438 \u043f\u043e\u043d\u044f\u0442\u043d\u044b\u0439: \u0435\u0441\u043b\u0438 <strong><span style=\"color: #0000ff;\">newValue<\/span><\/strong> \u00a0\u043d\u0435 \u0440\u0430\u0432\u043d\u043e <span style=\"color: #0000ff;\"><strong>nil<\/strong><\/span>, \u00a0\u0442\u043e \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c <strong>String interpolation<\/strong> (\u0438\u043d\u0442\u0435\u0440\u043f\u043e\u043b\u044f\u0446\u0438\u044e \u0441\u0442\u0440\u043e\u043a) \u0434\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0447\u0438\u0441\u043b\u0430 \u0432 \u0441\u0442\u0440\u043e\u043a\u043e\u0432\u043e\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435, \u0432 \u043f\u0440\u043e\u0442\u0438\u0432\u043d\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 &#8212; \u043e\u0447\u0438\u0449\u0430\u0435\u043c \u0434\u0438\u0441\u043f\u043b\u0435\u0439.<br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2702 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM.png\" alt=\"Screen Shot 2015-08-19 at 10.40.21 AM\" width=\"1062\" height=\"482\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM.png 1062w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM-300x136.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM-1024x465.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-10.40.21-AM-500x227.png 500w\" sizes=\"auto, (max-width: 1062px) 100vw, 1062px\" \/><\/a><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><em>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435 1.<\/em><\/strong><\/span>\u00a0\u041d\u043e \u0437\u0434\u0435\u0441\u044c \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u0435\u0442 \u0442\u0430 \u0436\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0430, \u0447\u0442\u043e \u0438 \u0441 \u043c\u0435\u0442\u043a\u043e\u0439<strong>\u00a0<span style=\"color: #0000ff;\">history<\/span>,<\/strong>\u00a0\u043f\u0440\u0438 \u043e\u0442\u0441\u0443\u0442\u0441\u0442\u0432\u0438\u0438 \u0432 \u043d\u0435\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e\u043d\u0430 \u0441\u0436\u0438\u043c\u0430\u0435\u0442\u0441\u044f \u0434\u043e \u043d\u0443\u043b\u0435\u0432\u044b\u0445 \u0440\u0430\u0437\u043c\u0435\u0440\u043e\u0432, \u0438 \u043f\u043e\u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f, \u0435\u0441\u043b\u0438 \u0432 \u043d\u0435\u0439 \u0447\u0442\u043e-\u0442\u043e \u0435\u0441\u0442\u044c.\u00a0\u041d\u0443\u0436\u043d\u043e \u043f\u043e\u043c\u0435\u0441\u0442\u0438\u0442\u044c \u043f\u0440\u043e\u0431\u0435\u043b <strong><span style=\"color: #0000ff;\">&#187; &#171;<\/span><\/strong> ( \u0438\u043c\u0435\u043d\u043d\u043e<strong><span style=\"color: #0000ff;\"> &#187; &#171;<\/span><\/strong>, \u0430 \u043d\u0435 <strong><span style=\"color: #0000ff;\">&#171;&#187;<\/span><\/strong>) \u043d\u0430 \u043d\u0430\u0448 \u0434\u0438\u0441\u043f\u043b\u0435\u0439. \u041f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432\u043d\u0435\u0441\u0435\u043c \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 \u043a\u043e\u0434 \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438\u00a0<span style=\"color: #0000ff;\"><strong>displayValue<\/strong>\u00a0=\u00a0<\/span><b><span style=\"color: #0000ff;\">&#187; &#171;<\/span>.<\/b><\/p>\n<p><span style=\"color: #000000;\"><strong><em>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435 2.\u00a0<\/em><\/strong>\u041e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043f\u0440\u043e\u0441\u0442\u043e \u043f\u0443\u0441\u0442\u044b\u043c \u0434\u0438\u0441\u043f\u043b\u0435\u0439 \u0432\u0441\u0435-\u0442\u0430\u043a\u0438 \u043d\u0435 \u043e\u0447\u0435\u043d\u044c \u0434\u0440\u0443\u0436\u0435\u043b\u044e\u0431\u043d\u043e, \u0445\u043e\u0442\u044f \u0438\u043c\u0435\u043d\u043d\u043e \u0432 \u044d\u0442\u043e\u043c \u0438 \u0441\u043e\u0441\u0442\u043e\u0438\u0442 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0439 \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439\u00a0<\/span><span style=\"color: #000000;\">\u043f\u0443\u043d\u043a\u0442 \u0417\u0430\u0434\u0430\u043d\u0438\u044f, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432 \u043c\u0435\u0442\u043a\u0435 <strong><span style=\"color: #0000ff;\">history<\/span><\/strong>\u00a0 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u0434\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0438\u044f<strong><span style=\"color: #0000ff;\"> &#187; Errror&#187;<\/span><\/strong> \u043c\u044b \u0443\u043a\u0430\u0436\u0435\u043c, \u0447\u0442\u043e \u0432 \u044d\u0442\u043e\u043c\u00a0<\/span>\u0441\u043b\u0443\u0447\u0430\u0435 \u0432\u043e\u0437\u043d\u0438\u043a\u043b\u0430 \u043e\u0448\u0438\u0431\u043a\u0430.<br \/>\n\u0422\u0435\u043f\u0435\u0440\u044c \u0432\u043e \u0432\u0441\u0435\u043c \u043a\u043e\u0434\u0435 <strong>ViewController<\/strong> \u0432\u043c\u0435\u0441\u0442\u043e\u00a0<code><span style=\"color: #0000ff;\"><strong>displayValue<\/strong><\/span>\u00a0<span style=\"color: #0000ff;\">=\u00a0<\/span><strong><span style=\"color: #0000ff;\">0<\/span>\u00a0<\/strong><\/code>\u0441\u0442\u0430\u0432\u0438\u043c<br \/>\n<span style=\"color: #0000ff;\"><strong>displayValue<\/strong><\/span>\u00a0<span style=\"color: #0000ff;\">= <b>nil<\/b><\/span>, \u043a\u0440\u043e\u043c\u0435\u00a0\u043c\u0435\u0442\u043e\u0434\u0430 <strong><span style=\"color: #0000ff;\">clearAll<\/span><\/strong><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM.png\" rel=\"attachment wp-att-4099\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-4099 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM.png\" alt=\"Screen Shot 2016-03-10 at 5.00.37 PM\" width=\"1214\" height=\"936\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM.png 1214w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM-300x231.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM-768x592.png 768w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM-1024x790.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/02\/Screen-Shot-2016-03-10-at-5.00.37-PM-389x300.png 389w\" sizes=\"auto, (max-width: 1214px) 100vw, 1214px\" \/><\/a><\/p>\n<p>\u041c\u044b \u043f\u0440\u0438\u0441\u0432\u0430\u0438\u0432\u0430\u0435\u043c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 <strong><span style=\"color: #0000ff;\">nil<\/span>\u00a0<\/strong>\u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u043c\u043e\u0439 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439\u00a0<strong><span style=\"color: #0000ff;\">displayValue<\/span><\/strong> \u0432 \u0441\u043b\u0443\u0447\u0430\u0435, \u0435\u0441\u043b\u0438 \u0443 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0438 \u043d\u0435\u0442 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u0433\u043e \u0447\u0438\u0441\u043b\u0430 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432, \u0435\u0441\u043b\u0438 \u0441\u0430\u043c\u0430 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u044f \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0435\u0442 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435, \u043a\u043e\u0442\u043e\u0440\u043e\u0435 \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u0442\u044c \u0432 <strong><span style=\"color: #0000ff;\">Double<\/span><\/strong> \u0438\u043b\u0438 \u0435\u0441\u043b\u0438 \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u0435\u043d \u0432\u0432\u043e\u0434 \u0442\u0435\u043a\u0441\u0442\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043d\u0435\u043b\u044c\u0437\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u0442\u044c \u0432 <strong><span style=\"color: #0000ff;\">Double<\/span><\/strong>.<br \/>\n\u0422\u0435\u043f\u0435\u0440\u044c \u043c\u044b \u043c\u043e\u0436\u0435\u043c \u0437\u0430\u043f\u0443\u0441\u043a\u0430\u0442\u044c \u043a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u0441\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u043c <strong>&#171;0&#187;<\/strong> \u043d\u0430 \u0434\u0438\u0441\u043f\u043b\u0435\u0435, \u0430 \u0432 \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u0448\u0438\u0431\u043a\u0438 \u044d\u043a\u0440\u0430\u043d \u0431\u0443\u0434\u0435\u0442 \u043f\u0443\u0441\u0442\u044b\u043c, \u043d\u043e \u043f\u043e\u044f\u0432\u0438\u0442\u0441\u044f \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u0435 \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0435 \u0432 \u0441\u0442\u0440\u043e\u043a\u0435, \u043e\u0442\u043e\u0431\u0440\u0430\u0436\u0430\u044e\u0449\u0435\u0439 \u0438\u0441\u0442\u043e\u0440\u0438\u044e \u0432\u0432\u043e\u0434\u0430 \u043e\u043f\u0435\u0440\u0430\u043d\u0434\u043e\u0432 \u0438 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u0439.<\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2706 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM.png\" alt=\"Screen Shot 2015-08-19 at 3.14.19 PM\" width=\"1516\" height=\"1188\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM.png 1516w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM-300x235.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM-1024x802.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.14.19-PM-383x300.png 383w\" sizes=\"auto, (max-width: 1516px) 100vw, 1516px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"text-decoration: underline;\"><strong><em>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435 3<\/em><\/strong><\/span>. \u041e\u0434\u0438\u043d \u0438\u0437 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u0435\u0439 \u0441\u0430\u0439\u0442\u0430 \u043f\u0440\u0438\u0441\u043b\u0430\u043b \u0442\u0430\u043a\u043e\u0439 \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0439 :&#187;\u043f\u0440\u0438 \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u0438 8.2 \u043c\u0438\u043d\u0443\u0441 8.5 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u0442\u0441\u044f -0.300000000001.<br \/>\n\u041f\u043e\u0447\u0435\u043c\u0443 \u0432\u043e\u0437\u043d\u0438\u043a\u0430\u0435\u0442 \u044d\u0442\u043e\u0442 \u0441\u043b\u0443\u0447\u0430\u0439? \u043f\u0440\u0438 \u044d\u0442\u043e\u043c 5.2-5.3 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0440\u043e\u0432\u043d\u043e -0.3. \u044f \u043d\u0435 \u043e\u0447\u0435\u043d\u044c \u043f\u043e\u043d\u0438\u043c\u0430\u044e\u2026&#187;<\/p>\n<p><span style=\"text-decoration: underline;\"><strong><em>\u041e\u0442\u0432\u0435\u0442.<\/em> <\/strong><\/span>\u0414\u0435\u0439\u0441\u0442\u0432\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0442\u0430\u043a, \u043b\u044e\u0431\u043e\u043f\u044b\u0442\u043d\u043e. \u042d\u0442\u043e \u0441\u0432\u044f\u0437\u0430\u043d\u043e \u0441 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c\u044e \u0431\u0438\u043d\u0430\u0440\u043d\u043e\u0433\u043e \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0447\u0438\u0441\u043b\u0430 \u0441 \u043f\u043b\u0430\u0432\u0430\u044e\u0449\u0435\u0439 \u0442\u043e\u0447\u043a\u043e\u0439. \u0415\u0441\u043b\u0438 \u0432\u044b \u0432\u043a\u043b\u044e\u0447\u0438\u0442\u0435 \u043e\u0442\u043b\u0430\u0434\u0447\u0438\u043a, \u0442\u043e \u0443\u0432\u0438\u0434\u0438\u0442\u0435, \u0447\u0442\u043e \u0447\u0438\u0441\u043b\u043e <strong>8.2<\/strong> \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043e \u043a\u0430\u043a <strong>8.1999999999999993<\/strong>, \u0430<strong> 8.5<\/strong> \u043a\u0430\u043a <strong>8.5<\/strong>, \u0442\u0430\u043a \u0447\u0442\u043e \u0440\u0430\u0437\u043d\u0438\u0446\u0430 \u0431\u0443\u0434\u0435\u0442 <strong>-0.30000000000000071<\/strong>. \u041d\u043e \u0432 <strong><span style=\"color: #0000ff;\">Double<\/span><\/strong> 15 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0445 \u0437\u043d\u0430\u0447\u0430\u0449\u0438\u0445 \u0446\u0438\u0444\u0440. \u041f\u0440\u0438 \u0432\u044b\u0447\u0438\u0442\u0430\u043d\u0438\u0438 \u0431\u043b\u0438\u0437\u043a\u0438\u0445 \u0447\u0438\u0441\u0435\u043b (8.2 \u0438 8.5) \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u044c \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0440\u0430\u0437\u043d\u043e\u0441\u0442\u0438 \u00a0\u0447\u0438\u0441\u0435\u043b \u0441\u043d\u0438\u0436\u0430\u0435\u0442\u0441\u044f (\u043c\u043e\u0436\u0435\u0442 \u0431\u044b\u0442\u044c \u0434\u043e 12 -13 \u0437\u043d\u0430\u0447\u0430\u0449\u0438\u0445 \u0446\u0438\u0444\u0440), \u0430 \u043d\u0430\u043c \u043f\u043e\u043a\u0430\u0437\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0435 15 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u043c\u0438 \u0437\u043d\u0430\u0447\u0430\u0449\u0438\u043c\u0438 \u0446\u0438\u0444\u0440\u0430\u043c\u0438, \u0442\u0430\u043a \u0447\u0442\u043e \u0446\u0438\u0444\u0440\u044b<strong> 71<\/strong> \u043d\u0430\u0445\u043e\u0434\u044f\u0442\u0441\u044f \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u0442\u043e\u0447\u043d\u043e\u0441\u0442\u0438 \u0447\u0438\u0441\u043b\u0430 <strong><span style=\"color: #0000ff;\">Double<\/span><\/strong>, \u043d\u043e \u0438\u043c\u0435\u043d\u043d\u043e \u043e\u043d\u0438 \u0438 \u0434\u0430\u044e\u0442 \u043d\u0430\u043c \u0432 \u043a\u043e\u043d\u0446\u0435 <strong>1<\/strong>. \u041a\u0441\u0442\u0430\u0442\u0438, \u0447\u0438\u0441\u043b\u043e <strong>5.2<\/strong> \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u043a <strong>5.2000000000000002<\/strong>, \u0430 \u0430 <strong>5.5<\/strong> \u043a\u0430\u043a<strong> 5.5<\/strong>, \u0442\u0430\u043a \u0447\u0442\u043e \u0440\u0430\u0437\u043d\u0438\u0446\u0430 \u0431\u0443\u0434\u0435\u0442 <strong>-0.29999999999999982<\/strong>, \u043d\u043e \u0432 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043e\u043a\u0440\u0443\u0433\u043b\u0435\u043d\u0438\u0435 \u0432\u044b\u0434\u0430\u0441\u0442 \u043f\u0440\u0430\u0432\u0438\u043b\u044c\u043d\u044b\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 (\u043d\u0430\u043c \u043f\u0440\u043e\u0441\u0442\u043e \u043f\u043e\u0432\u0435\u0437\u043b\u043e). \u0414\u043b\u044f \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0447\u0438\u0441\u043b\u0430 (8.2 -8.5) \u0432 \u0441\u0442\u0440\u043e\u043a\u0443 \u043c\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c <strong>String interpolation<\/strong>\u00a0<strong><span style=\"color: #0000ff;\">&#171;\\(newValue)&#187;<\/span><\/strong>, \u043a\u043e\u0442\u043e\u0440\u0430\u044f \u043f\u044b\u0442\u0430\u0435\u0442\u0441\u044f \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0432\u0441\u0435 15 \u0434\u0435\u0441\u044f\u0442\u0438\u0447\u043d\u044b\u0445 \u0446\u0438\u0444\u0440 \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0447\u043a\u0438, \u0447\u0442\u043e \u043d\u0435\u0432\u0435\u0440\u043d\u043e, \u0442\u0430\u043a \u043a\u0430\u043a \u0438\u0441\u0445\u043e\u0434\u043d\u043e\u0435 \u0447\u0438\u0441\u043b\u043e \u0441\u043e\u0434\u0435\u0440\u0436\u0430\u043b\u043e \u0442\u043e\u043b\u044c\u043a\u043e 15 \u0432\u0435\u0440\u043d\u044b\u0445 \u0437\u043d\u0430\u0447\u0430\u0449\u0438\u0445 \u0446\u0438\u0444\u0440 8.20000000000000. \u041a \u0441\u043e\u0436\u0430\u043b\u0435\u043d\u0438\u044e, \u043c\u044b \u043d\u0435 \u043c\u043e\u0436\u0435\u043c \u0443\u043f\u0440\u0430\u0432\u043b\u044f\u0442\u044c \u0444\u043e\u0440\u043c\u0430\u0442\u043e\u043c \u0432\u044b\u0432\u043e\u0434\u0430 \u0432 <strong>String interpolation<\/strong>, \u043d\u043e \u043c\u043e\u0436\u0435\u043c \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u0431\u043e\u043b\u0435\u0435 \u0433\u0438\u0431\u043a\u0438\u0439 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e <strong><span style=\"color: #0000ff;\">NSNumberFormatter<\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\">.<\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2709 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM.png\" alt=\"Screen Shot 2015-08-19 at 3.41.43 PM\" width=\"1066\" height=\"754\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM.png 1066w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM-300x212.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM-1024x724.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-3.41.43-PM-424x300.png 424w\" sizes=\"auto, (max-width: 1066px) 100vw, 1066px\" \/><\/a><span style=\"color: #000000;\">\u041c\u044b \u043c\u043e\u0436\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u00a0<\/span><span style=\"color: #0000ff;\"><strong>NSNumberFormatter<\/strong><\/span><span style=\"color: #000000;\">\u00a0\u0441\u043e \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u043c\u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u043c\u0438 \u043f\u0440\u0438 \u0432\u044b\u0432\u043e\u0434\u0435 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u043e\u0432 \u043d\u0430\u00a0<span style=\"color: #0000ff;\"><strong>display<\/strong><\/span>.\u00a0<\/span>\u0412 <strong><span style=\"color: #0000ff;\">NSNumberFormatter<\/span> <\/strong>\u043c\u043e\u0436\u043d\u043e \u043d\u0430\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0442\u044c \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0435 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e \u0446\u0438\u0444\u0440 \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0447\u043a\u0438 ( <strong><span style=\"color: #0000ff;\">maximumFractionDigits<\/span><\/strong> ).<span style=\"color: #0000ff;\"><span style=\"color: #000000;\">\u0412 \u0441\u043b\u0443\u0447\u0430\u0435 \u0431\u043e\u043b\u044c\u0448\u0438\u0445 \u0447\u0438\u0441\u0435\u043b \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u044b \u0440\u0430\u0437\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u0438 \u0433\u0440\u0443\u043f\u043f \u0446\u0438\u0444\u0440 (<strong><span style=\"color: #0000ff;\">groupingSeparator<\/span><\/strong>), \u0435\u0441\u043b\u0438 \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0447\u043a\u0438 \u0432\u044b\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u043e\u0447\u0435\u043d\u044c \u043c\u043d\u043e\u0433\u043e \u0437\u043d\u0430\u043a\u043e\u0432, \u0442\u043e \u043c\u044b \u0431\u044b \u0445\u043e\u0442\u0435\u043b\u0438 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0438\u0442\u044c\u0441\u044f 10 \u0437\u043d\u0430\u043a\u0430\u043c\u0438 \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0447\u043a\u0438, \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u0444\u0443\u043d\u043a\u0446\u0438\u0438, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440,\u00a0<\/span><strong>\u221a\u00a0<\/strong><\/span>\u043c\u043e\u0433\u0443\u0442 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0442\u044c \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435\u00a0<strong><span style=\"color: #0000ff;\">Nan<\/span><\/strong>\u00a0\u043f\u0440\u0438 \u043e\u0442\u0440\u0438\u0446\u0430\u0442\u0435\u043b\u044c\u043d\u043e\u043c \u0430\u0440\u0433\u0443\u043c\u0435\u043d\u0442\u0435 \u0438 \u043d\u0430\u043c \u043d\u0430\u0434\u043e \u0443\u043a\u0430\u0437\u0430\u0442\u044c, \u0447\u0442\u043e \u044d\u0442\u043e \u043e\u0448\u0438\u0431\u043a\u0430\u00a0<strong><span style=\"color: #0000ff;\">Error<\/span><\/strong> (<strong><span style=\"color: #0000ff;\">notANumberSymbol<\/span><\/strong>). \u041c\u044b \u043f\u043e\u043b\u0443\u0447\u0430\u0435\u043c\u00a0<strong><span style=\"color: #0000ff;\">NSNumberFormatter<\/span><\/strong>\u00a0\u0441\u043e \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u044b\u043c\u0438 \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u0430\u043c\u0438 \u043f\u0440\u0438 \u043f\u043e\u043c\u043e\u0449\u0438 \u0444\u0443\u043d\u043a\u0446\u0438\u0438\u00a0<strong><span style=\"color: #0000ff;\">numberFormatter()<\/span><\/strong><\/p>\n<p><span style=\"text-decoration: underline;\"><strong><em>\u0417\u0430\u043c\u0435\u0447\u0430\u043d\u0438\u0435 3<\/em><\/strong><\/span>. \u041d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0441\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0444\u0443\u043d\u043a\u0446\u0438\u044e <strong><span style=\"color: #0000ff;\">addHistory<\/span><\/strong>, \u0442\u0430\u043a \u043a\u0430\u043a \u043f\u043e\u043c\u0438\u043c\u043e \u0437\u043d\u0430\u043a\u0430 <strong><span style=\"color: #0000ff;\">&#171;=&#187;<\/span> <\/strong>\u043c\u044b \u0435\u0449\u0435 \u0434\u043e\u0431\u0430\u0432\u0438\u043b\u0438 \u0441\u0442\u0440\u043e\u043a\u0443<strong><span style=\"color: #0000ff;\"> &#171;Error&#187;<\/span><\/strong><span style=\"color: #0000ff;\"><span style=\"color: #000000;\"> . \u041d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0443\u043c\u0435\u0442\u044c \u0443\u0431\u0438\u0440\u0430\u0442\u044c \u0438\u0445 \u043f\u0435\u0440\u0435\u0434 \u0432\u0432\u043e\u0434\u043e\u043c \u043d\u043e\u0432\u043e\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f, \u043f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u044f, \u0447\u0442\u043e \u043e\u043d\u0438 \u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0442\u0440\u043e\u043a\u0438<\/span><\/span><\/p>\n<p><a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2710 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM.png\" alt=\"Screen Shot 2015-08-19 at 5.14.33 PM\" width=\"1318\" height=\"374\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM.png 1318w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM-300x85.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM-1024x291.png 1024w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-5.14.33-PM-500x142.png 500w\" sizes=\"auto, (max-width: 1318px) 100vw, 1318px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u041a\u043e\u0434 \u044d\u0442\u043e\u0433\u043e \u043f\u0443\u043d\u043a\u0442\u0430 \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430<strong>\u00a0<a href=\"https:\/\/github.com\/BestKora\/Calculator-cs193p-Winter-2015-Assigment-1\">Github<\/a>.<\/strong><\/p>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<h2>\u0417\u0430\u0434\u0430\u043d\u0438\u0435 1 \u0434\u043b\u044f iOS 9 \u00a0\u0438 Swift 2.0<\/h2>\n<p>\u0410\u0432\u0442\u043e\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438 \u043f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u0443\u0435\u043c \u043a\u043e\u0434 Swift 1.2 \u0432 Swift 2.0 \u0441 \u043f\u043e\u043c\u043e\u0449\u044c\u044e \u043c\u0435\u043d\u044e <strong>Edit<\/strong> -&gt; <strong>Convert<\/strong> -&gt; <strong>To Latest Swift Syntax<\/strong>&#8230;<br \/>\n\u041f\u0440\u0435\u043e\u0431\u0440\u0430\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u043a\u043e\u0441\u043d\u0443\u043b\u0438\u0441\u044c \u0442\u043e\u043b\u044c\u043a\u043e \u0440\u0430\u0431\u043e\u0442\u044b \u0441\u043e \u0441\u0442\u0440\u043e\u043a\u0430\u043c\u0438<br \/>\n<strong>Swift 1.2<\/strong><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.53.23-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2713 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.53.23-PM.png\" alt=\"Screen Shot 2015-08-19 at 6.53.23 PM\" width=\"1000\" height=\"240\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.53.23-PM.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.53.23-PM-300x72.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.53.23-PM-500x120.png 500w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><br \/>\n<strong>Swift 2.0<\/strong><br \/>\n<a href=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.56.38-PM.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-2714 size-full\" src=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.56.38-PM.png\" alt=\"Screen Shot 2015-08-19 at 6.56.38 PM\" width=\"1000\" height=\"244\" srcset=\"https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.56.38-PM.png 1000w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.56.38-PM-300x73.png 300w, https:\/\/bestkora.com\/IosDeveloper\/wp-content\/uploads\/2015\/08\/Screen-Shot-2015-08-19-at-6.56.38-PM-500x122.png 500w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><br \/>\n\u041a\u043e\u0434 \u0434\u043b\u044f <strong>Swift 2.0<\/strong> \u043d\u0430\u0445\u043e\u0434\u0438\u0442\u0441\u044f \u043d\u0430<strong><a href=\"https:\/\/github.com\/BestKora\/Calculator-Assignment-1-iOS-9\"> Github<\/a>.<\/strong><br \/>\n\u041d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0437\u0434\u0435\u0441\u044c:<p><span class=\"gdm-drivefile-embed\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/ssl.gstatic.com\/docs\/doclist\/images\/icon_12_pdf_list.png\" width=\"16\" height=\"16\" \/> <a href=\"https:\/\/drive.google.com\/file\/d\/0B0jZOSo2e4NmMk15RnZSWnlVNTQ\/view?usp=drivesdk\" target=\"&quot;_blank&quot;\">\u0417\u0430\u0434\u0430\u043d\u0438\u0435 1 iOS 8.pdf<\/a><\/span><\/p><\/p>\n<p>\u0420\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u044b \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u0437\u0430\u0434\u0430\u043d\u0438\u0439 \u043c\u043e\u0436\u043d\u043e \u043f\u043e\u0441\u044b\u043b\u0430\u0442\u044c \u043d\u0430 \u0444\u043e\u0440\u0443\u043c\u00a0<strong><a href=\"https:\/\/groups.google.com\/forum\/?hl=ru#!forum\/swiftru\">Swift[ru]<\/a><\/strong>\u00a0\u0434\u043b\u044f \u043e\u0431\u0441\u0443\u0436\u0434\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0441\u044c\u0431\u0430 \u0434\u0430\u0432\u0430\u0442\u044c \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u0443\u044e \u043e\u0446\u0435\u043d\u043a\u0443 \u043f\u0440\u0438\u0441\u043b\u0430\u043d\u043d\u044b\u043c \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442\u0430\u043c \u0438 \u0441\u0440\u0430\u0432\u043d\u0438\u0432\u0430\u0442\u044c \u0440\u0435\u0448\u0435\u043d\u0438\u044f.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0422\u0435\u043a\u0441\u0442 \u0414\u043e\u043c\u0430\u0448\u043d\u0435\u0433\u043e \u0437\u0430\u0434\u0430\u043d\u0438\u044f \u043d\u0430 \u0430\u043d\u0433\u043b\u0438\u0439\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u0435\u043d \u043d\u0430\u00a0\u00a0iTunes \u0432 \u043f\u0443\u043d\u043a\u0442\u0435 \u201cDeveloping iOS 8 app: Programming: Project 1\u2033.\u00a0\u041d\u0430 \u0440\u0443\u0441\u0441\u043a\u043e\u043c \u044f\u0437\u044b\u043a\u0435 \u0432\u044b \u043c\u043e\u0436\u0435\u0442\u0435 \u0441\u043a\u0430\u0447\u0430\u0442\u044c \u0437\u0434\u0435\u0441\u044c: \u041d\u0430\u0447\u0438\u043d\u0430\u0435\u043c \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0442\u044c \u0417\u0430\u0434\u0430\u043d\u0438\u0435 1 \u0441 \u043a\u043e\u0434\u0430, \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u0432 \u043a\u043e\u043d\u0446\u0435 \u041b\u0435\u043a\u0446\u0438\u0438 2 \u0441 \u0443\u0447\u0435\u0442\u043e\u043c \u0443\u0442\u043e\u0447\u043d\u0435\u043d\u0438\u0439 \u0434\u043b\u044f Swift &hellip; <a href=\"https:\/\/bestkora.com\/IosDeveloper\/zadanie-1-cs193p-winter-2015-kalkulyator-new\/\">\u0427\u0438\u0442\u0430\u0442\u044c \u0434\u0430\u043b\u0435\u0435 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6,22,23,14],"tags":[30,26],"class_list":["post-2658","post","type-post","status-publish","format-standard","hentry","category-assignment","category-ios-8","category-stanford-cs-193p-ios-8","category-swift","tag-domashnee-zadanie","tag-zadanie-ios-8"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u0440\u0438\u0432\u043e\u0434\u0438\u0442\u0441\u044f \u0442\u0435\u043a\u0441\u0442 \u0438 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u0417\u0430\u0434\u0430\u043d\u0438\u044f 1 cs193p Winter 2015 \u041a\u0430\u043b\u044c\u043a\u0443\u043b\u044f\u0442\u043e\u0440 \u043d\u0430 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content=\"\u041e\u0431\u0443\u0447\u0430\u044e\u0449\u0438\u0439 \u043a\u0443\u0440\u0441 \u043f\u043e \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 iOS+Swift \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439. | \u0420\u0443\u0441\u0441\u043a\u0438\u0439 \u043d\u0435\u0430\u0432\u0442\u043e\u0440\u0438\u0437\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u043a\u043e\u043d\u0441\u043f\u0435\u043a\u0442 \u043b\u0435\u043a\u0446\u0438\u0439 \u0421\u0442\u044d\u043d\u0444\u043e\u0440\u0434\u0441\u043a\u043e\u0433\u043e \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0438\u0442\u0435\u0442\u0430 &quot; \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0430 iOS \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439&quot; 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 , 2023,  2024,  2025  \u0438 2026 \u0433\u0433., \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0430\u0435\u043c\u044b\u0439 \u0440\u0435\u0448\u0435\u043d\u0438\u044f\u043c\u0438 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