{"id":514,"date":"2018-02-23T23:38:55","date_gmt":"2018-02-23T15:38:55","guid":{"rendered":"http:\/\/60.205.208.74\/2018\/02\/23\/swift-%e8%bf%90%e7%ae%97%e7%ac%a6\/"},"modified":"2018-02-23T23:38:55","modified_gmt":"2018-02-23T15:38:55","slug":"swift-%e8%bf%90%e7%ae%97%e7%ac%a6","status":"publish","type":"post","link":"https:\/\/www.puzi7.net\/?p=514","title":{"rendered":"Swift \u8fd0\u7b97\u7b26"},"content":{"rendered":"<span itemprop=\"description\"><div class=\"article-body\">\n<div class=\"article-intro\" id=\"content\">\n<h1>Swift \u8fd0\u7b97\u7b26<\/h1>\n<p>\u8fd0\u7b97\u7b26\u662f\u4e00\u4e2a\u7b26\u53f7\uff0c\u7528\u4e8e\u544a\u8bc9\u7f16\u8bd1\u5668\u6267\u884c\u4e00\u4e2a\u6570\u5b66\u6216\u903b\u8f91\u8fd0\u7b97\u3002<\/p>\n<p>Swift \u63d0\u4f9b\u4e86\u4ee5\u4e0b\u51e0\u79cd\u8fd0\u7b97\u7b26\uff1a<\/p>\n<ul class=\"list\">\n<li>\u7b97\u672f\u8fd0\u7b97\u7b26<\/li>\n<li>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/li>\n<li>\u903b\u8f91\u8fd0\u7b97\u7b26<\/li>\n<li>\u4f4d\u8fd0\u7b97\u7b26<\/li>\n<li>\u8d4b\u503c\u8fd0\u7b97\u7b26<\/li>\n<li>\u533a\u95f4\u8fd0\u7b97\u7b26<\/li>\n<li>\u5176\u4ed6\u8fd0\u7b97\u7b26<\/li>\n<\/ul>\n<p>\u672c\u7ae0\u8282\u6211\u4eec\u5c06\u4e3a\u5927\u5bb6\u8be6\u7ec6\u4ecb\u7ecd\u7b97\u672f\u8fd0\u7b97\u7b26\u3001\u5173\u7cfb\u8fd0\u7b97\u7b26\u3001\u903b\u8f91\u8fd0\u7b97\u7b26\u3001\u4f4d\u8fd0\u7b97\u7b26\u3001\u8d4b\u503c\u8fd0\u7b97\u7b26\u53ca\u5176\u4ed6\u8fd0\u7b97\u7b26\u3002<\/p>\n<hr>\n<h2>\u7b97\u672f\u8fd0\u7b97\u7b26<\/h2>\n<p>\u4ee5\u4e0b\u8868\u683c\u5217\u51fa\u4e86 Swift \u8bed\u8a00\u652f\u6301\u7684\u7b97\u672f\u8fd0\u7b97\u7b26\uff0c\u5176\u4e2d\u53d8\u91cf A \u4e3a 10\uff0c\u53d8\u91cf B \u4e3a 20\uff1a<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>+<\/td>\n<td>\u52a0\u53f7<\/td>\n<td>A + B \u7ed3\u679c\u4e3a 30<\/td>\n<\/tr>\n<tr>\n<td>\u2212<\/td>\n<td>\u51cf\u53f7<\/td>\n<td>A \u2212 B \u7ed3\u679c\u4e3a -10<\/td>\n<\/tr>\n<tr>\n<td>*<\/td>\n<td>\u4e58\u53f7<\/td>\n<td>A * B \u7ed3\u679c\u4e3a 200<\/td>\n<\/tr>\n<tr>\n<td>\/<\/td>\n<td>\u9664\u53f7<\/td>\n<td>B \/ A \u7ed3\u679c\u4e3a 2<\/td>\n<\/tr>\n<tr>\n<td>%<\/td>\n<td>\u6c42\u4f59<\/td>\n<td>B % A \u7ed3\u679c\u4e3a 0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<blockquote>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>swift3 \u4e2d\u5df2\u7ecf\u53d6\u6d88\u4e86<span class=\"marked\">++<\/span>\u3001<span class=\"marked\">&#8212;<\/span>\u3002<\/p>\n<\/blockquote>\n<h3>\u5b9e\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u4e3a\u7b97\u672f\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 10\nvar B = 20\n\nprint(\"A + B \u7ed3\u679c\u4e3a\uff1a\\(A + B)\")\nprint(\"A - B \u7ed3\u679c\u4e3a\uff1a\\(A - B)\")\nprint(\"A * B \u7ed3\u679c\u4e3a\uff1a\\(A * B)\")\nprint(\"B \/ A \u7ed3\u679c\u4e3a\uff1a\\(B \/ A)\")\nA += 1   \/\/ \u7c7b\u4f3c A++\nprint(\"A += 1 \u540e A \u7684\u503c\u4e3a \\(A)\")\nB -= 1   \/\/ \u7c7b\u4f3c B--\nprint(\"B -= 1 \u540e B \u7684\u503c\u4e3a \\(B)\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nA + B \u7ed3\u679c\u4e3a\uff1a30\nA - B \u7ed3\u679c\u4e3a\uff1a-10\nA * B \u7ed3\u679c\u4e3a\uff1a200\nB \/ A \u7ed3\u679c\u4e3a\uff1a2\nA += 1 \u540e A \u7684\u503c\u4e3a 11\nB -= 1 \u540e B \u7684\u503c\u4e3a 19\n<\/pre>\n<hr>\n<h2>\u6bd4\u8f83\u8fd0\u7b97\u7b26<\/h2>\n<p>\u4ee5\u4e0b\u8868\u683c\u5217\u51fa\u4e86 Swift \u8bed\u8a00\u652f\u6301\u7684\u6bd4\u8f83\u8fd0\u7b97\u7b26\uff0c\u5176\u4e2d\u53d8\u91cf A \u4e3a 10\uff0c\u53d8\u91cf B \u4e3a 20\uff1a<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>==<\/td>\n<td>\u7b49\u4e8e<\/td>\n<td>(A == B) \u4e3a false\u3002<\/td>\n<\/tr>\n<tr>\n<td>!=<\/td>\n<td>\u4e0d\u7b49\u4e8e<\/td>\n<td>(A != B) \u4e3a true\u3002<\/td>\n<\/tr>\n<tr>\n<td>&gt;<\/td>\n<td>\u5927\u4e8e<\/td>\n<td>(A &gt; B) \u4e3a false\u3002<\/td>\n<\/tr>\n<tr>\n<td>&lt;<\/td>\n<td>\u5c0f\u4e8e<\/td>\n<td>(A &lt; B) \u4e3a true\u3002<\/td>\n<\/tr>\n<tr>\n<td>&gt;=<\/td>\n<td>\u5927\u4e8e\u7b49\u4e8e<\/td>\n<td>(A &gt;= B) \u4e3a false\u3002<\/td>\n<\/tr>\n<tr>\n<td>&lt;=<\/td>\n<td>\u5c0f\u4e8e\u7b49\u4e8e<\/td>\n<td>(A &lt;= B) \u4e3a true\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u5b9e\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u4e3a\u6bd4\u8f83\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 10\nvar B = 20\n\nprint(\"A == B \u7ed3\u679c\u4e3a\uff1a\\(A == B)\")\nprint(\"A != B \u7ed3\u679c\u4e3a\uff1a\\(A != B)\")\nprint(\"A &gt; B \u7ed3\u679c\u4e3a\uff1a\\(A &gt; B)\")\nprint(\"A &lt; B \u7ed3\u679c\u4e3a\uff1a\\(A &lt; B)\")\nprint(\"A &gt;= B \u7ed3\u679c\u4e3a\uff1a\\(A &gt;= B)\")\nprint(\"A &lt;= B \u7ed3\u679c\u4e3a\uff1a\\(A &lt;= B)\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nA == B \u7ed3\u679c\u4e3a\uff1afalse\nA != B \u7ed3\u679c\u4e3a\uff1atrue\nA &gt; B \u7ed3\u679c\u4e3a\uff1afalse\nA &lt; B \u7ed3\u679c\u4e3a\uff1atrue\nA &gt;= B \u7ed3\u679c\u4e3a\uff1afalse\nA &lt;= B \u7ed3\u679c\u4e3a\uff1atrue\n<\/pre>\n<hr>\n<h2>\u903b\u8f91\u8fd0\u7b97\u7b26<\/h2>\n<p>\u4ee5\u4e0b\u8868\u683c\u5217\u51fa\u4e86 Swift \u8bed\u8a00\u652f\u6301\u7684\u903b\u8f91\u8fd0\u7b97\u7b26\uff0c\u5176\u4e2d\u53d8\u91cf A \u4e3a true\uff0c\u53d8\u91cf B \u4e3a false\uff1a<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>&amp;&amp;<\/td>\n<td>\u903b\u8f91\u4e0e\u3002\u5982\u679c\u8fd0\u7b97\u7b26\u4e24\u4fa7\u90fd\u4e3a TRUE \u5219\u4e3a TRUE\u3002<\/td>\n<td>(A &amp;&amp; B) \u4e3a false\u3002<\/td>\n<\/tr>\n<tr>\n<td>||<\/td>\n<td>\u903b\u8f91\u6216\u3002 \u5982\u679c\u8fd0\u7b97\u7b26\u4e24\u4fa7\u81f3\u5c11\u6709\u4e00\u4e2a\u4e3a TRUE \u5219\u4e3a TRUE\u3002<\/td>\n<td>(A || B) \u4e3a true\u3002<\/td>\n<\/tr>\n<tr>\n<td>!<\/td>\n<td>\u903b\u8f91\u975e\u3002\u5e03\u5c14\u503c\u53d6\u53cd\uff0c\u4f7f\u5f97true\u53d8false\uff0cfalse\u53d8true\u3002<\/td>\n<td>!(A &amp;&amp; B) \u4e3a true\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u903b\u8f91\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = true\nvar B = false\n\nprint(\"A &amp;&amp; B \u7ed3\u679c\u4e3a\uff1a\\(A &amp;&amp; B)\")\nprint(\"A || B \u7ed3\u679c\u4e3a\uff1a\\(A || B)\")\nprint(\"!A \u7ed3\u679c\u4e3a\uff1a\\(!A)\")\nprint(\"!B \u7ed3\u679c\u4e3a\uff1a\\(!B)\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nA &amp;&amp; B \u7ed3\u679c\u4e3a\uff1afalse\nA || B \u7ed3\u679c\u4e3a\uff1atrue\n!A \u7ed3\u679c\u4e3a\uff1afalse\n!B \u7ed3\u679c\u4e3a\uff1atrue\n<\/pre>\n<hr>\n<h2>\u4f4d\u8fd0\u7b97\u7b26<\/h2>\n<p>\u4f4d\u8fd0\u7b97\u7b26\u7528\u6765\u5bf9\u4e8c\u8fdb\u5236\u4f4d\u8fdb\u884c\u64cd\u4f5c\uff0c~,&amp;,|,^\u5206\u522b\u4e3a\u53d6\u53cd\uff0c\u6309\u4f4d\u4e0e\u4e0e\uff0c\u6309\u4f4d\u4e0e\u6216\uff0c\u6309\u4f4d\u4e0e\u5f02\u6216\u8fd0\u7b97\uff0c\u5982\u4e0b\u8868\u5b9e\u4f8b\uff1a<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>p<\/th>\n<th>q<\/th>\n<th>p &amp; q<\/th>\n<th>p | q<\/th>\n<th>p ^ q<\/th>\n<\/tr>\n<tr>\n<td>0<\/td>\n<td>0<\/td>\n<td>0<\/td>\n<td>0<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>0<\/td>\n<td>1<\/td>\n<td>0<\/td>\n<td>1<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>1<\/td>\n<td>1<\/td>\n<td>1<\/td>\n<td>0<\/td>\n<\/tr>\n<tr>\n<td>1<\/td>\n<td>0<\/td>\n<td>0<\/td>\n<td>1<\/td>\n<td>1<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5982\u679c\u6307\u5b9a A = 60; \u53ca B = 13; \u4e24\u4e2a\u53d8\u91cf\u5bf9\u5e94\u7684\u4e8c\u8fdb\u5236\u4e3a\uff1a\n<\/p>\n<pre>\nA = 0011 1100\n\nB = 0000 1101\n<\/pre>\n<p>\n\u8fdb\u884c\u4f4d\u8fd0\u7b97\uff1a\n<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th style=\"width:5%;\">\u8fd0\u7b97\u7b26<\/th>\n<th style=\"width:30%;\">\u63cf\u8ff0<\/th>\n<th style=\"width:40%;\">\u56fe\u89e3<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>&amp;<\/td>\n<td>\u6309\u4f4d\u4e0e\u3002\u6309\u4f4d\u4e0e\u8fd0\u7b97\u7b26\u5bf9\u4e24\u4e2a\u6570\u8fdb\u884c\u64cd\u4f5c\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\uff0c\u8fd9\u4e2a\u6570\u7684\u6bcf\u4e2a\u4f4d\u90fd\u9700\u8981\u4e24\u4e2a\u8f93\u5165\u6570\u7684\u540c\u4e00\u4f4d\u90fd\u4e3a1\u65f6\u624d\u4e3a1\u3002<\/td>\n<td><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/8370_140612144422_1.png\"><\/td>\n<td>(A &amp; B) \u7ed3\u679c\u4e3a 12, \u4e8c\u8fdb\u5236\u4e3a 0000 1100<\/td>\n<\/tr>\n<tr>\n<td>|<\/td>\n<td>\u6309\u4f4d\u6216\u3002\u6309\u4f4d\u6216\u8fd0\u7b97\u7b26|\u6bd4\u8f83\u4e24\u4e2a\u6570\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u6570\uff0c\u8fd9\u4e2a\u6570\u7684\u6bcf\u4e00\u4f4d\u8bbe\u7f6e1\u7684\u6761\u4ef6\u662f\u4e24\u4e2a\u8f93\u5165\u6570\u7684\u540c\u4e00\u4f4d\u90fd\u4e0d\u4e3a0(\u5373\u4efb\u610f\u4e00\u4e2a\u4e3a1\uff0c\u6216\u90fd\u4e3a1)\u3002<\/td>\n<td><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/8370_140612144511_1.png\"><\/td>\n<td>(A | B) \u7ed3\u679c\u4e3a 61, \u4e8c\u8fdb\u5236\u4e3a 0011 1101<\/td>\n<\/tr>\n<tr>\n<td>^<\/td>\n<td>\u6309\u4f4d\u5f02\u6216. \u6309\u4f4d\u5f02\u6216\u8fd0\u7b97\u7b26^\u6bd4\u8f83\u4e24\u4e2a\u6570\uff0c\u7136\u540e\u8fd4\u56de\u4e00\u4e2a\u6570\uff0c\u8fd9\u4e2a\u6570\u7684\u6bcf\u4e2a\u4f4d\u8bbe\u4e3a1\u7684\u6761\u4ef6\u662f\u4e24\u4e2a\u8f93\u5165\u6570\u7684\u540c\u4e00\u4f4d\u4e0d\u540c\uff0c\u5982\u679c\u76f8\u540c\u5c31\u8bbe\u4e3a0\u3002<\/td>\n<td><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/8370_140612144558_1.png\"><\/td>\n<td>(A ^ B) \u7ed3\u679c\u4e3a 49, \u4e8c\u8fdb\u5236\u4e3a 0011 0001<\/td>\n<\/tr>\n<tr>\n<td>~<\/td>\n<td>\u6309\u4f4d\u53d6\u53cd\u8fd0\u7b97\u7b26~\u5bf9\u4e00\u4e2a\u64cd\u4f5c\u6570\u7684\u6bcf\u4e00\u4f4d\u90fd\u53d6\u53cd\u3002<\/td>\n<td><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/8370_140612144245_1.png\"><\/td>\n<td>(~A ) \u7ed3\u679c\u4e3a -61, \u4e8c\u8fdb\u5236\u4e3a 1100 0011 in 2&#8217;s complement form.<\/td>\n<\/tr>\n<tr>\n<td>&lt;&lt;<\/td>\n<td>\u6309\u4f4d\u5de6\u79fb\u3002\u5de6\u79fb\u64cd\u4f5c\u7b26\uff08&lt;\n<\/td>\n<td>\n<p>\u4e0b\u56fe\u5c55\u793a\u4e8611111111 &lt;&lt; 1\uff0811111111 \u5de6\u79fb\u4e00\u4f4d\uff09\u7684\u7ed3\u679c\u3002\u84dd\u8272\u6570\u5b57\u8868\u793a\u88ab\u79fb\u52a8\u4f4d\uff0c\u7070\u8272\u8868\u793a\u88ab\u4e22\u5f03\u4f4d\uff0c\u7a7a\u4f4d\u7528\u6a59\u8272\u76840\u586b\u5145\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/leftbit.jpg\"><\/p>\n<\/td>\n<td>A &lt;&lt; 2 \u7ed3\u679c\u4e3a 240, \u4e8c\u8fdb\u5236\u4e3a 1111 0000<\/td>\n<\/tr>\n<tr>\n<td>&gt;&gt;<\/td>\n<td>\u6309\u4f4d\u53f3\u79fb\u3002\u53f3\u79fb\u64cd\u4f5c\u7b26\uff08&lt;\n<\/td>\n<td>\n<p>\u4e0b\u56fe\u5c55\u793a\u4e8611111111 &gt;&gt; 1\uff0811111111 \u53f3\u79fb\u4e00\u4f4d\uff09\u7684\u7ed3\u679c\u3002\u84dd\u8272\u6570\u5b57\u8868\u793a\u88ab\u79fb\u52a8\u4f4d\uff0c\u7070\u8272\u8868\u793a\u88ab\u4e22\u5f03\u4f4d\uff0c\u7a7a\u4f4d\u7528\u6a59\u8272\u76840\u586b\u5145\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/www.runoob.com\/wp-content\/uploads\/2015\/10\/rightbit.jpg\">\n<\/td>\n<td>A &gt;&gt; 2 \u7ed3\u679c\u4e3a 15, \u4e8c\u8fdb\u5236\u4e3a 0000 1111<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u4f4d\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 60  \/\/ \u4e8c\u8fdb\u5236\u4e3a 0011 1100\nvar B = 13 \/\/ \u4e8c\u8fdb\u5236\u4e3a 0000 1101\n\nprint(\"A&amp;B \u7ed3\u679c\u4e3a\uff1a\\(A&amp;B)\")\nprint(\"A|B \u7ed3\u679c\u4e3a\uff1a\\(A|B)\")\nprint(\"A^B \u7ed3\u679c\u4e3a\uff1a\\(A^B)\")\nprint(\"~A \u7ed3\u679c\u4e3a\uff1a\\(~A)\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nA&amp;B \u7ed3\u679c\u4e3a\uff1a12\nA|B \u7ed3\u679c\u4e3a\uff1a61\nA^B \u7ed3\u679c\u4e3a\uff1a49\n~A \u7ed3\u679c\u4e3a\uff1a-61\n<\/pre>\n<hr>\n<h2>\u8d4b\u503c\u8fd0\u7b97<\/h2>\n<p>\u4e0b\u8868\u5217\u51fa\u4e86 Swift \u8bed\u8a00\u7684\u57fa\u672c\u8d4b\u503c\u8fd0\u7b97\uff1a<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>=<\/td>\n<td>\u7b80\u5355\u7684\u8d4b\u503c\u8fd0\u7b97\uff0c\u6307\u5b9a\u53f3\u8fb9\u64cd\u4f5c\u6570\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C = A + B \u5c06 A + B \u7684\u8fd0\u7b97\u7ed3\u679c\u8d4b\u503c\u7ed9 C<\/td>\n<\/tr>\n<tr>\n<td>+=<\/td>\n<td>\u76f8\u52a0\u540e\u518d\u8d4b\u503c\uff0c\u5c06\u5de6\u53f3\u4e24\u8fb9\u7684\u64cd\u4f5c\u6570\u76f8\u52a0\u540e\u518d\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C += A \u76f8\u5f53\u4e8e C = C + A<\/td>\n<\/tr>\n<tr>\n<td>-=<\/td>\n<td>\u76f8\u51cf\u540e\u518d\u8d4b\u503c\uff0c\u5c06\u5de6\u53f3\u4e24\u8fb9\u7684\u64cd\u4f5c\u6570\u76f8\u51cf\u540e\u518d\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C -= A \u76f8\u5f53\u4e8e C = C &#8211; A<\/td>\n<\/tr>\n<tr>\n<td>*=<\/td>\n<td>\u76f8\u4e58\u540e\u518d\u8d4b\u503c\uff0c\u5c06\u5de6\u53f3\u4e24\u8fb9\u7684\u64cd\u4f5c\u6570\u76f8\u4e58\u540e\u518d\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C *= A \u76f8\u5f53\u4e8e C = C * A<\/td>\n<\/tr>\n<tr>\n<td>\/=<\/td>\n<td>\u76f8\u9664\u540e\u518d\u8d4b\u503c\uff0c\u5c06\u5de6\u53f3\u4e24\u8fb9\u7684\u64cd\u4f5c\u6570\u76f8\u9664\u540e\u518d\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C \/= A \u76f8\u5f53\u4e8e C = C \/ A<\/td>\n<\/tr>\n<tr>\n<td>%=<\/td>\n<td>\u6c42\u4f59\u540e\u518d\u8d4b\u503c\uff0c\u5c06\u5de6\u53f3\u4e24\u8fb9\u7684\u64cd\u4f5c\u6570\u6c42\u4f59\u540e\u518d\u8d4b\u503c\u7ed9\u5de6\u8fb9\u7684\u64cd\u4f5c\u6570\u3002<\/td>\n<td>C %= A is equivalent to C = C % A<\/td>\n<\/tr>\n<tr>\n<td>&lt;&lt;=<\/td>\n<td>\u6309\u4f4d\u5de6\u79fb\u540e\u518d\u8d4b\u503c<\/td>\n<td>C &lt;&lt;= 2 \u76f8\u5f53\u4e8e C = C &lt;&lt; 2<\/td>\n<\/tr>\n<tr>\n<td>&gt;&gt;=<\/td>\n<td>\u6309\u4f4d\u53f3\u79fb\u540e\u518d\u8d4b\u503c<\/td>\n<td>C &gt;&gt;= 2 \u76f8\u5f53\u4e8e C = C &gt;&gt; 2<\/td>\n<\/tr>\n<tr>\n<td>&amp;=<\/td>\n<td>\u6309\u4f4d\u4e0e\u8fd0\u7b97\u540e\u8d4b\u503c<\/td>\n<td>C &amp;= 2 \u76f8\u5f53\u4e8e C = C &amp; 2<\/td>\n<\/tr>\n<tr>\n<td>^=<\/td>\n<td>\u6309\u4f4d\u5f02\u6216\u8fd0\u7b97\u7b26\u540e\u518d\u8d4b\u503c<\/td>\n<td>C ^= 2 \u76f8\u5f53\u4e8e C = C ^ 2<\/td>\n<\/tr>\n<tr>\n<td>|=<\/td>\n<td>\u6309\u4f4d\u6216\u8fd0\u7b97\u540e\u518d\u8d4b\u503c<\/td>\n<td>C |= 2 \u76f8\u5f53\u4e8e C = C | 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u8d4b\u503c\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 10\nvar B = 20\nvar C = 100\n\nC = A + B\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC += A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC -= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC *= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC \/= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\n\/\/\u4ee5\u4e0b\u6d4b\u8bd5\u5df2\u6ce8\u91ca\uff0c\u53ef\u53bb\u6389\u6ce8\u91ca\u6d4b\u8bd5\u6bcf\u4e2a\u5b9e\u4f8b\n\/*\nC %= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\n\nC &lt;&lt;= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC &gt;&gt;= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC &amp;= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC ^= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n\nC |= A\nprint(\"C \u7ed3\u679c\u4e3a\uff1a\\(C)\")\n*\/\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nC \u7ed3\u679c\u4e3a\uff1a30\nC \u7ed3\u679c\u4e3a\uff1a40\nC \u7ed3\u679c\u4e3a\uff1a30\nC \u7ed3\u679c\u4e3a\uff1a300\nC \u7ed3\u679c\u4e3a\uff1a30\n<\/pre>\n<hr>\n<h2>\u533a\u95f4\u8fd0\u7b97\u7b26<\/h2>\n<p>Swift \u63d0\u4f9b\u4e86\u4e24\u4e2a\u533a\u95f4\u7684\u8fd0\u7b97\u7b26\u3002<\/p>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>\u95ed\u533a\u95f4\u8fd0\u7b97\u7b26<\/p>\n<\/td>\n<td>\u95ed\u533a\u95f4\u8fd0\u7b97\u7b26\uff08a&#8230;b\uff09\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u4ecea\u5230b(\u5305\u62eca\u548cb)\u7684\u6240\u6709\u503c\u7684\u533a\u95f4\uff0cb\u5fc5\u987b\u5927\u4e8e\u7b49\u4e8ea\u3002 \u200c \u95ed\u533a\u95f4\u8fd0\u7b97\u7b26\u5728\u8fed\u4ee3\u4e00\u4e2a\u533a\u95f4\u7684\u6240\u6709\u503c\u65f6\u662f\u975e\u5e38\u6709\u7528\u7684\uff0c\u5982\u5728for-in\u5faa\u73af\u4e2d\uff1a<\/td>\n<td>1&#8230;5 \u533a\u95f4\u503c\u4e3a 1, 2, 3, 4 \u548c 5<\/td>\n<\/tr>\n<tr>\n<td>\u534a\u5f00\u533a\u95f4\u8fd0\u7b97\u7b26<\/td>\n<td>\u534a\u5f00\u533a\u95f4\uff08a..<b><br \/>\n<\/b><\/td>\n<td>1..&lt; 5 \u533a\u95f4\u503c\u4e3a 1, 2, 3, \u548c 4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u533a\u95f4\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nprint(\"\u95ed\u533a\u95f4\u8fd0\u7b97\u7b26:\")\nfor index in 1...5 {\n    print(\"\\(index) * 5 = \\(index * 5)\")\n}\n\nprint(\"\u534a\u5f00\u533a\u95f4\u8fd0\u7b97\u7b26:\")\nfor index in 1..&lt;5 {\n    print(\"\\(index) * 5 = \\(index * 5)\")\n}\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n\u95ed\u533a\u95f4\u8fd0\u7b97\u7b26:\n1 * 5 = 5\n2 * 5 = 10\n3 * 5 = 15\n4 * 5 = 20\n5 * 5 = 25\n\u534a\u5f00\u533a\u95f4\u8fd0\u7b97\u7b26:\n1 * 5 = 5\n2 * 5 = 10\n3 * 5 = 15\n4 * 5 = 20\n<\/pre>\n<h2>\u5176\u4ed6\u8fd0\u7b97\u7b26<\/h2>\n<p>Swift \u63d0\u4f9b\u4e86\u5176\u4ed6\u7c7b\u578b\u7684\u7684\u8fd0\u7b97\u7b26\uff0c\u5982\u4e00\u5143\u3001\u4e8c\u5143\u548c\u4e09\u5143\u8fd0\u7b97\u7b26\u3002<\/p>\n<ul>\n<li>\u4e00\u5143\u8fd0\u7b97\u7b26\u5bf9\u5355\u4e00\u64cd\u4f5c\u5bf9\u8c61\u64cd\u4f5c\uff08\u5982<code>-a<\/code>\uff09\u3002\u4e00\u5143\u8fd0\u7b97\u7b26\u5206\u524d\u7f6e\u8fd0\u7b97\u7b26\u548c\u540e\u7f6e\u8fd0\u7b97\u7b26\uff0c\u524d\u7f6e\u8fd0\u7b97\u7b26\u9700\u7d27\u8ddf\u5728\u64cd\u4f5c\u5bf9\u8c61\u4e4b\u524d\uff08\u5982<code>!b<\/code>\uff09\uff0c\u540e\u7f6e\u8fd0\u7b97\u7b26\u9700\u7d27\u8ddf\u5728\u64cd\u4f5c\u5bf9\u8c61\u4e4b\u540e\uff08\u4f8b\u5982c!\uff09\u3002<strong>\u5907\u6ce8\uff1a<\/strong>\u5728Java\uff0fC\u6ca1\u6709\u7c7b\u4f3cc\uff01\u7684\u8bed\u6cd5\uff0c \u5728Swift\u4e2d\u7528\u5728Optional\u7c7b\u578b\u53d6\u503c\u3002<\/li>\n<li>\u4e8c\u5143\u8fd0\u7b97\u7b26\u64cd\u4f5c\u4e24\u4e2a\u64cd\u4f5c\u5bf9\u8c61\uff08\u5982<code>2 + 3<\/code>\uff09\uff0c\u662f\u4e2d\u7f6e\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u51fa\u73b0\u5728\u4e24\u4e2a\u64cd\u4f5c\u5bf9\u8c61\u4e4b\u95f4\u3002<\/li>\n<li>\u4e09\u5143\u8fd0\u7b97\u7b26\u64cd\u4f5c\u4e09\u4e2a\u64cd\u4f5c\u5bf9\u8c61\uff0c\u548c C \u8bed\u8a00\u4e00\u6837\uff0cSwift \u53ea\u6709\u4e00\u4e2a\u4e09\u5143\u8fd0\u7b97\u7b26\uff0c\u5c31\u662f\u4e09\u76ee\u8fd0\u7b97\u7b26\uff08<code>a ? b : c<\/code>\uff09\u3002<\/li>\n<\/ul>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u63cf\u8ff0<\/th>\n<th style=\"width:25%;\">\u5b9e\u4f8b<\/th>\n<\/tr>\n<tr>\n<td>\u4e00\u5143\u51cf<\/td>\n<td>\u6570\u5b57\u524d\u6dfb\u52a0 &#8211; \u53f7\u524d\u7f00<\/td>\n<td>-3 \u6216 -4<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u5143\u52a0<\/td>\n<td>\u6570\u5b57\u524d\u6dfb\u52a0 + \u53f7\u524d\u7f00<\/td>\n<td>+6 \u7ed3\u679c\u4e3a 6<\/td>\n<\/tr>\n<tr>\n<td>\u4e09\u5143\u8fd0\u7b97\u7b26<\/td>\n<td><span class=\"marked\">condition ? X : Y<\/span><\/td>\n<td>\u5982\u679c <strong>condition<\/strong> \u4e3a true \uff0c\u503c\u4e3a X \uff0c\u5426\u5219\u4e3a Y<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u4e00\u5143\u3001\u4e8c\u5143\u3001\u4e09\u5143\u7684\u8fd0\u7b97\u7684\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 1\nvar B = 2\nvar C = true\nvar D = false\nprint(\"-A \u7684\u503c\u4e3a\uff1a\\(-A)\")\nprint(\"A + B \u7684\u503c\u4e3a\uff1a\\(A + B)\")\nprint(\"\u4e09\u5143\u8fd0\u7b97\uff1a\\(C ? A : B )\")\nprint(\"\u4e09\u5143\u8fd0\u7b97\uff1a\\(D ? A : B )\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\n-A \u7684\u503c\u4e3a\uff1a-1\nA + B \u7684\u503c\u4e3a\uff1a3\n\u4e09\u5143\u8fd0\u7b97\uff1a1\n\u4e09\u5143\u8fd0\u7b97\uff1a2\n<\/pre>\n<hr>\n<h2>\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7<\/h2>\n<p>\u5728\u4e00\u4e2a\u8868\u8fbe\u5f0f\u4e2d\u53ef\u80fd\u5305\u542b\u591a\u4e2a\u6709\u4e0d\u540c\u8fd0\u7b97\u7b26\u8fde\u63a5\u8d77\u6765\u7684\u3001\u5177\u6709\u4e0d\u540c\u6570\u636e\u7c7b\u578b\u7684\u6570\u636e\u5bf9\u8c61\uff1b\u7531\u4e8e\u8868\u8fbe\u5f0f\u6709\u591a\u79cd\u8fd0\u7b97\uff0c\u4e0d\u540c\u7684\u8fd0\u7b97\u987a\u5e8f\u53ef\u80fd\u5f97\u51fa\u4e0d\u540c\u7ed3\u679c\u751a\u81f3\u51fa\u73b0\u9519\u8bef\u8fd0\u7b97\u9519\u8bef\uff0c\u56e0\u4e3a\u5f53\u8868\u8fbe\u5f0f\u4e2d\u542b\u591a\u79cd\u8fd0\u7b97\u65f6\uff0c\u5fc5\u987b\u6309\u4e00\u5b9a\u987a\u5e8f\u8fdb\u884c\u7ed3\u5408\uff0c\u624d\u80fd\u4fdd\u8bc1\u8fd0\u7b97\u7684\u5408\u7406\u6027\u548c\u7ed3\u679c\u7684\u6b63\u786e\u6027\u3001\u552f\u4e00\u6027\u3002\n<\/p>\n<p>\n\u4f18\u5148\u7ea7\u4ece\u4e0a\u5230\u4e0b\u4f9d\u6b21\u9012\u51cf\uff0c\u6700\u4e0a\u9762\u5177\u6709\u6700\u9ad8\u7684\u4f18\u5148\u7ea7\uff0c\u9017\u53f7\u64cd\u4f5c\u7b26\u5177\u6709\u6700\u4f4e\u7684\u4f18\u5148\u7ea7\u3002<\/p>\n<p>\n\u76f8\u540c\u4f18\u5148\u7ea7\u4e2d\uff0c\u6309\u7ed3\u5408\u987a\u5e8f\u8ba1\u7b97\u3002\u5927\u591a\u6570\u8fd0\u7b97\u662f\u4ece\u5de6\u81f3\u53f3\u8ba1\u7b97\uff0c\u53ea\u6709\u4e09\u4e2a\u4f18\u5148\u7ea7\u662f\u4ece\u53f3\u81f3\u5de6\u7ed3\u5408\u7684\uff0c\u5b83\u4eec\u662f\u5355\u76ee\u8fd0\u7b97\u7b26\u3001\u6761\u4ef6\u8fd0\u7b97\u7b26\u3001\u8d4b\u503c\u8fd0\u7b97\u7b26\u3002<\/p>\n<p>\n\u57fa\u672c\u7684\u4f18\u5148\u7ea7\u9700\u8981\u8bb0\u4f4f\uff1a\n<\/p>\n<ul>\n<li>\n\u6307\u9488\u6700\u4f18\uff0c\u5355\u76ee\u8fd0\u7b97\u4f18\u4e8e\u53cc\u76ee\u8fd0\u7b97\u3002\u5982\u6b63\u8d1f\u53f7\u3002<\/li>\n<li>\n\u5148\u4e58\u9664\uff08\u6a21\uff09\uff0c\u540e\u52a0\u51cf\u3002<\/li>\n<li>\n\u5148\u7b97\u672f\u8fd0\u7b97\uff0c\u540e\u79fb\u4f4d\u8fd0\u7b97\uff0c\u6700\u540e\u4f4d\u8fd0\u7b97\u3002\u8bf7\u7279\u522b\u6ce8\u610f\uff1a1 &lt;&lt; 3 + 2 &amp; 7 \u7b49\u4ef7\u4e8e (1 &lt;&lt; (3 + 2))&amp;7<\/li>\n<li>\n\u903b\u8f91\u8fd0\u7b97\u6700\u540e\u8ba1\u7b97<\/li>\n<\/ul>\n<table class=\"reference\">\n<tbody>\n<tr>\n<th>\u8fd0\u7b97\u7b26\u7c7b\u578b<\/th>\n<th>\u8fd0\u7b97\u7b26<\/th>\n<th>\u7ed3\u5408\u65b9\u5411<\/th>\n<\/tr>\n<tr>\n<td>\u8868\u8fbe\u5f0f\u8fd0\u7b97<\/td>\n<td>() [] . <\/td>\n<td>\u5de6\u5230\u53f3<\/td>\n<\/tr>\n<tr>\n<td>\u4e00\u5143\u8fd0\u7b97\u7b26<\/td>\n<td>\n<p>* &amp; + &#8211; ! ~ <\/p>\n<p>* \/ %<\/p>\n<p>+ &#8211;<\/p>\n<p>&gt;&gt; &lt;&lt;<\/p>\n<p>&lt; &gt; &lt;= &gt;=<\/p>\n<p>== !=<\/p>\n<\/td>\n<td style=\"vertical-align:middle;\">\u5de6\u5230\u53f3<\/td>\n<\/tr>\n<tr>\n<td>\u4f4d\u8fd0\u7b97\u7b26<\/td>\n<td>\n<p>&amp;<\/p>\n<p>^<\/p>\n<p>|<\/p>\n<p>&amp;&amp;<\/p>\n<p>||<\/p>\n<\/td>\n<td style=\"vertical-align:middle;\">\u5de6\u5230\u53f3<\/td>\n<\/tr>\n<tr>\n<td>\u4e09\u5143\u8fd0\u7b97\u7b26<\/td>\n<td>?:<\/td>\n<td>\u53f3\u5230\u5de6<\/td>\n<\/tr>\n<tr>\n<td>\u8d4b\u503c\u8fd0\u7b97\u7b26<\/td>\n<td>= += -= *= \/= %= &gt;&gt;= &lt;&lt;= &amp;= ^= |=<\/td>\n<td>\u53f3\u5230\u5de6<\/td>\n<\/tr>\n<tr>\n<td>\u9017\u53f7<\/td>\n<td>,<\/td>\n<td>\u5de6\u5230\u53f3<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4ee5\u4e0b\u4e3a\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\u7b80\u5355\u5b9e\u4f8b\uff1a<\/p>\n<pre>\nimport Cocoa\n\nvar A = 0\n\nA = 2 + 3 * 4 % 5\nprint(\"A \u7684\u503c\u4e3a\uff1a\\(A)\")\n<\/pre>\n<p>\u4ee5\u4e0a\u7a0b\u5e8f\u6267\u884c\u7ed3\u679c\u4e3a\uff1a<\/p>\n<pre>\nA \u7684\u503c\u4e3a\uff1a4\n<\/pre>\n<p><b>\u5b9e\u4f8b\u89e3\u6790\uff1a<\/b><\/p>\n<p>\u6839\u636e\u8fd0\u7b97\u7b26\u4f18\u5148\u7ea7\uff0c\u53ef\u4ee5\u5c06\u4ee5\u4e0a\u7a0b\u5e8f\u7684\u8fd0\u7b97\u89e3\u6790\u4e3a\u4ee5\u4e0b\u6b65\u9aa4\uff0c\u8868\u8fbe\u5f0f\u76f8\u5f53\u4e8e\uff1a<\/p>\n<pre>2 + ((3 * 4) % 5)\n<\/pre>\n<p>\u7b2c\u4e00\u6b65\u8ba1\u7b97\uff1a<br \/>\n(3 * 4) = 12\uff0c\u6240\u4ee5\u8868\u8fbe\u5f0f\u76f8\u5f53\u4e8e\uff1a<\/p>\n<\/p>\n<pre>\n2 + (12 % 5)<\/pre>\n<p>\n\u7b2c\u4e8c\u6b65\u8ba1\u7b97 12 % 5 = 2\uff0c\u6240\u4ee5\u8868\u8fbe\u5f0f\u76f8\u5f53\u4e8e\uff1a<\/p>\n<pre>\n2 + 2<\/pre>\n<p>\n\u6b64\u65f6\u53ef\u4ee5\u5bb9\u6613\u5730\u770b\u51fa\u8ba1\u7b97\u7684\u7ed3\u679c\u4e3a 4\u3002<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<span>","protected":false},"excerpt":{"rendered":"<p class=\"excerpt\"><span itemprop=\"description\">Swift \u8fd0\u7b97\u7b26 \u8fd0\u7b97\u7b26\u662f\u4e00\u4e2a\u7b26\u53f7\uff0c\u7528\u4e8e\u544a\u8bc9\u7f16\u8bd1\u5668\u6267\u884c\u4e00\u4e2a\u6570\u5b66\u6216\u903b\u8f91\u8fd0\u7b97\u3002 Swift &hellip;<\/span><\/p>\n<p class=\"more-link-p btn-align-right\"><a class=\"green zoom-btn\" href=\"https:\/\/www.puzi7.net\/?p=514\">Read More<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26,28],"tags":[74,119],"class_list":["post-514","post","type-post","status-publish","format-standard","hentry","category-mobile","category-swift","tag-ios","tag-swift","zoom-theme-has-thumb"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Swift \u8fd0\u7b97\u7b26 - \u8c31\u5b50\u68cb - Puzi7<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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