{"id":1675,"date":"2018-09-21T19:28:24","date_gmt":"2018-09-21T11:28:24","guid":{"rendered":"https:\/\/damogame.cn:15443\/wordpress\/?p=1675"},"modified":"2018-09-21T19:28:24","modified_gmt":"2018-09-21T11:28:24","slug":"%e4%bb%a3%e7%a0%81%e7%ae%80%e6%b4%81%e4%b9%8b%e9%81%93%ef%bc%9ac-11-%e4%b9%8bauto-for_each-lamda%e8%a1%a8%e8%be%be%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/1675","title":{"rendered":"\u4ee3\u7801\u7b80\u6d01\u4e4b\u9053\uff1aC++ 11 \u4e4bauto+ for_each + lamda\u8868\u8fbe\u5f0f"},"content":{"rendered":"<div class=\"article-header-box\">\n<div class=\"article-header\">\n<div class=\"article-title-box\">\n<h1 class=\"title-article\">\u4ee3\u7801\u7b80\u6d01\u4e4b\u9053\uff1aC++ 11 \u4e4bauto+ for_each + lamda\u8868\u8fbe\u5f0f<\/h1>\n<\/div>\n<div class=\"article-info-box\">\n<div class=\"article-bar-top\"><span class=\"time\">2014\u5e7408\u670811\u65e5 14:14:29<\/span>\u00a0<a class=\"follow-nickName\" href=\"https:\/\/me.csdn.net\/trochiluses\" target=\"_blank\" rel=\"noopener\">\u8c01\u4e0d\u5c0f\u5fc3\u7684<\/a>\u00a0<span class=\"read-count\">\u9605\u8bfb\u6570\uff1a3153<\/span>\u00a0<span class=\"tags-box artic-tag-box\"><span class=\"label\">\u6807\u7b7e\uff1a<\/span>\u00a0<a class=\"tag-link\" href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=C++&amp;t=blog\" target=\"_blank\" rel=\"noopener\" data-track-click=\"{&quot;mod&quot;:&quot;popu_626&quot;,&quot;con&quot;:&quot;C++&quot;}\">C++<\/a><a class=\"tag-link\" href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=lamda&amp;t=blog\" target=\"_blank\" rel=\"noopener\" data-track-click=\"{&quot;mod&quot;:&quot;popu_626&quot;,&quot;con&quot;:&quot;lamda&quot;}\">lamda<\/a><a class=\"tag-link\" href=\"http:\/\/so.csdn.net\/so\/search\/s.do?q=%E5%8C%BF%E5%90%8D%E5%87%BD%E6%95%B0&amp;t=blog\" target=\"_blank\" rel=\"noopener\" data-track-click=\"{&quot;mod&quot;:&quot;popu_626&quot;,&quot;con&quot;:&quot;\u533f\u540d\u51fd\u6570&quot;}\">\u533f\u540d\u51fd\u6570<\/a>\u00a0<span class=\"article_info_click\">\u66f4\u591a<\/span><\/span><\/p>\n<div class=\"tags-box space\"><span class=\"label\">\u4e2a\u4eba\u5206\u7c7b\uff1a<\/span>\u00a0<a class=\"tag-link\" href=\"https:\/\/blog.csdn.net\/trochiluses\/article\/category\/2317277\" target=\"_blank\" rel=\"noopener\">C++<\/a><\/div>\n<\/div>\n<div class=\"operating\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<article>\n<div id=\"article_content\" class=\"article_content clearfix csdn-tracking-statistics\" data-pid=\"blog\" data-mod=\"popu_307\" data-dsm=\"post\">\n<div class=\"htmledit_views\">\n<p>\u6458\u8981\uff1a\u5728\u5f88\u591a\u4e2d\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u9700\u8981\u8fd9\u6837\u7684\u8fd0\u7b97\uff1a\u7ed9vector\u4e2d\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u76f8\u4f3c\u7684\u5904\u7406\uff08\u6bcf\u4e2a\u5143\u7d20+1\uff0c\u6216\u8005\u5176\u4ed6\uff09.\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4f1a\u9009\u7528for\u5faa\u73af\uff0c\u7136\u540e\u7136\u540e\u5bf9\u6bcf\u4e2a\u5143\u7d20\u8fdb\u884c\u5904\u7406\u3002\u5b9e\u9645\u4e0a\uff0cC++ 11\u63d0\u4f9b\u4e86\u4e86lamda\u8868\u8fbe\u5f0f\uff0c\u7ed3\u5408for_each,\u53ef\u4ee5\u5199\u51fa\u66f4\u52a0\u7b80\u6d01\u548c\u9ad8\u6548\u7684\u4ee3\u7801\u3002<\/p>\n<h2><a name=\"t0\"><\/a>1.for_each.\u7b80\u4ecb<\/h2>\n<p>for_each\u662fC++\u4e2d\u7684\u6a21\u677f\uff0c\u5177\u4f53\u7528\u6cd5\u53ef\u4ee5\u53c2\u8003\u8fd9\u91cc\uff1a<a href=\"http:\/\/www.cplusplus.com\/reference\/algorithm\/for_each\/\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/www.cplusplus.com\/reference\/algorithm\/for_each\/<\/a><\/p>\n<h2><a name=\"t1\"><\/a>2.lamda\u8868\u8fbe\u5f0f<\/h2>\n<p>lamda\u8868\u8fbe\u5f0f\uff0c\u5728python\u4e2d\u4e5f\u6709\uff0c\u7b80\u5355\u5730\u8bf4\u5c31\u662f\u533f\u540d\u51fd\u6570\u3002\u5173\u4e8elamda\u8868\u8fbe\u5f0f\u7684\u4f8b\u5b50\u548c\u8be6\u7ec6\u7528\u6cd5\uff0c\u6211\u4eec\u53ef\u4ee5\u53c2\u8003\u8fd9\uff1a<a href=\"http:\/\/en.wikipedia.org\/wiki\/Anonymous_function#C.2B.2B\" target=\"_blank\" rel=\"nofollow noopener\">http:\/\/en.wikipedia.org\/wiki\/Anonymous_function#C.2B.2B<\/a><\/p>\n<p>C++11\u63d0\u4f9b\u4e86\u5bf9\u533f\u540d\u51fd\u6570\u7684\u652f\u6301,\u79f0\u4e3aLambda\u51fd\u6570(\u4e5f\u53ebLambda\u8868\u8fbe\u5f0f). Lambda\u8868\u8fbe\u5f0f\u5177\u4f53\u5f62\u5f0f\u5982\u4e0b:<\/p>\n<p>[capture](parameters)-&gt;return-type{body}<br \/>\ncapture:\u9700\u8981\u7528\u5230\u7684\u5916\u90e8\u53d8\u91cf\uff0cparameters\uff1a\u51fd\u6570\u53c2\u6570\uff1bbody\uff1a\u51fd\u6570\u4f53<br \/>\n\u5982\u679c\u6ca1\u6709\u53c2\u6570,\u7a7a\u7684\u5706\u62ec\u53f7()\u53ef\u4ee5\u7701\u7565.\u8fd4\u56de\u503c\u4e5f\u53ef\u4ee5\u7701\u7565,\u5982\u679c\u51fd\u6570\u4f53\u53ea\u7531\u4e00\u6761return\u8bed\u53e5\u7ec4\u6210\u6216\u8fd4\u56de\u7c7b\u578b\u4e3avoid\u7684\u8bdd.\u5f62\u5982:<\/p>\n<p>[capture](parameters){body}<\/p>\n<p>\u4e0b\u9762\u4e3e\u4e86\u51e0\u4e2aLambda\u51fd\u6570\u7684\u4f8b\u5b50:<\/p>\n<p>[](int x, int y) { return x + y; } \/\/ \u9690\u5f0f\u8fd4\u56de\u7c7b\u578b<br \/>\n[](int&amp; x) { ++x; } \u00a0 \/\/ \u6ca1\u6709return\u8bed\u53e5 -&gt; lambda \u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u662f&#8217;void&#8217;<br \/>\n[a](int&amp; x) { x+=a; } \u00a0 \/\/ \u6ca1\u6709return\u8bed\u53e5 -&gt; lambda \u51fd\u6570\u7684\u8fd4\u56de\u7c7b\u578b\u662f&#8217;void&#8217;;\u6ce8\u610f\uff0c\u6b64\u5904a\u662f\u4ecelambda\u51fd\u6570\u4f53\u5916\u90e8\u4f20\u5165\u5176\u4e2d\u7684\u53d8\u91cf<br \/>\n[]() { ++global_x; } \u00a0\/\/ \u6ca1\u6709\u53c2\u6570,\u4ec5\u8bbf\u95ee\u67d0\u4e2a\u5168\u5c40\u53d8\u91cf<br \/>\n[]{ ++global_x; } \u00a0 \u00a0 \/\/ \u4e0e\u4e0a\u4e00\u4e2a\u76f8\u540c,\u7701\u7565\u4e86()<br \/>\n\u53ef\u4ee5\u50cf\u4e0b\u9762\u8fd9\u6837\u663e\u793a\u6307\u5b9a\u8fd4\u56de\u7c7b\u578b:<br \/>\n[](int x, int y) -&gt; int { int z = x + y; return z; }<br \/>\n\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u521b\u5efa\u4e86\u4e00\u4e2a\u4e34\u65f6\u53d8\u91cfz\u6765\u5b58\u50a8\u4e2d\u95f4\u503c. \u548c\u666e\u901a\u51fd\u6570\u4e00\u6837,\u8fd9\u4e2a\u4e2d\u95f4\u503c\u4e0d\u4f1a\u4fdd\u5b58\u5230\u4e0b\u6b21\u8c03\u7528. \u4ec0\u4e48\u4e5f\u4e0d\u8fd4\u56de\u7684Lambda\u51fd\u6570\u53ef\u4ee5\u7701\u7565\u8fd4\u56de\u7c7b\u578b, \u800c\u4e0d\u9700\u8981\u4f7f\u7528 -&gt; void \u5f62\u5f0f.<br \/>\nLambda\u51fd\u6570\u53ef\u4ee5\u5f15\u7528\u5728\u5b83\u4e4b\u5916\u58f0\u660e\u7684\u53d8\u91cf. \u8fd9\u4e9b\u53d8\u91cf\u7684\u96c6\u5408\u53eb\u505a\u4e00\u4e2a\u95ed\u5305. \u95ed\u5305\u88ab\u5b9a\u4e49\u5728Lambda\u8868\u8fbe\u5f0f\u58f0\u660e\u4e2d\u7684\u65b9\u62ec\u53f7[]\u5185. \u8fd9\u4e2a\u673a\u5236\u5141\u8bb8\u8fd9\u4e9b\u53d8\u91cf\u88ab\u6309\u503c\u6216\u6309\u5f15\u7528\u6355\u83b7.\u4e0b\u9762\u8fd9\u4e9b\u4f8b\u5b50\u5c31\u662f:<\/p>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<ol class=\"hljs-ln\">\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"1\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[] <span class=\"hljs-comment\">\/\/\u672a\u5b9a\u4e49\u53d8\u91cf.\u8bd5\u56fe\u5728Lambda\u5185\u4f7f\u7528\u4efb\u4f55\u5916\u90e8\u53d8\u91cf\u90fd\u662f\u9519\u8bef\u7684.<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"2\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[x, &amp;y] <span class=\"hljs-comment\">\/\/x \u6309\u503c\u6355\u83b7, y \u6309\u5f15\u7528\u6355\u83b7.<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"3\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[&amp;] <span class=\"hljs-comment\">\/\/\u7528\u5230\u7684\u4efb\u4f55\u5916\u90e8\u53d8\u91cf\u90fd\u9690\u5f0f\u6309\u5f15\u7528\u6355\u83b7<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"4\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[=] <span class=\"hljs-comment\">\/\/\u7528\u5230\u7684\u4efb\u4f55\u5916\u90e8\u53d8\u91cf\u90fd\u9690\u5f0f\u6309\u503c\u6355\u83b7<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"5\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[&amp;, x] <span class=\"hljs-comment\">\/\/x\u663e\u5f0f\u5730\u6309\u503c\u6355\u83b7. \u5176\u5b83\u53d8\u91cf\u6309\u5f15\u7528\u6355\u83b7<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"6\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">[=, &amp;z] <span class=\"hljs-comment\">\/\/z\u6309\u5f15\u7528\u6355\u83b7. \u5176\u5b83\u53d8\u91cf\u6309\u503c\u6355\u83b7<\/span><\/div>\n<\/div>\n<\/li>\n<\/ol>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<p>\u63a5\u4e0b\u6765\u7684\u4e24\u4e2a\u4f8b\u5b50\u6f14\u793a\u4e86Lambda\u8868\u8fbe\u5f0f\u7684\u7528\u6cd5.<\/p>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<ol class=\"hljs-ln\">\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"1\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; some_list;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"2\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">int<\/span> total = <span class=\"hljs-number\">0<\/span>;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"3\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">int<\/span> i=<span class=\"hljs-number\">0<\/span>;i&lt;<span class=\"hljs-number\">5<\/span>;++i) some_list.push_back(i);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"4\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">std<\/span>::for_each(begin(some_list), end(some_list), [&amp;total](<span class=\"hljs-keyword\">int<\/span> x)<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"5\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">{<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"6\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">total += x;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"7\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">});<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<p>\u6b64\u4f8b\u8ba1\u7b97list\u4e2d\u6240\u6709\u5143\u7d20\u7684\u603b\u548c. \u53d8\u91cftotal\u88ab\u5b58\u4e3alambda\u51fd\u6570\u95ed\u5305\u7684\u4e00\u90e8\u5206. \u56e0\u4e3a\u5b83\u662f\u6808\u53d8\u91cf(\u5c40\u90e8\u53d8\u91cf)total\u7684\u5f15\u7528,\u6240\u4ee5\u53ef\u4ee5\u6539\u53d8\u5b83\u7684\u503c.<\/p>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<ol class=\"hljs-ln\">\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"1\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">std<\/span>::<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; some_list;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"2\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">int<\/span> total = <span class=\"hljs-number\">0<\/span>;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"3\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">int<\/span> value = <span class=\"hljs-number\">5<\/span>;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"4\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">std<\/span>::for_each(begin(some_list), end(some_list), [&amp;, value, <span class=\"hljs-keyword\">this<\/span>](<span class=\"hljs-keyword\">int<\/span> x)<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"5\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">{<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"6\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">total += x * value * <span class=\"hljs-keyword\">this<\/span>-&gt;some_func();<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"7\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">});<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<p>\u6b64\u4f8b\u4e2dtotal\u4f1a\u5b58\u4e3a\u5f15\u7528, value\u5219\u4f1a\u5b58\u4e00\u4efd\u503c\u62f7\u8d1d. \u5bf9this\u7684\u6355\u83b7\u6bd4\u8f83\u7279\u6b8a, \u5b83\u53ea\u80fd\u6309\u503c\u6355\u83b7. this\u53ea\u6709\u5f53\u5305\u542b\u5b83\u7684\u6700\u9760\u8fd1\u5b83\u7684\u51fd\u6570\u4e0d\u662f\u9759\u6001\u6210\u5458\u51fd\u6570\u65f6\u624d\u80fd\u88ab\u6355\u83b7.\u5bf9protect\u548cpriviate\u6210\u5458\u6765\u8bf4, \u8fd9\u4e2alambda\u51fd\u6570\u4e0e\u521b\u5efa\u5b83\u7684\u6210\u5458\u51fd\u6570\u6709\u76f8\u540c\u7684\u8bbf\u95ee\u63a7\u5236. \u5982\u679cthis\u88ab\u6355\u83b7\u4e86,\u4e0d\u7ba1\u662f\u663e\u5f0f\u8fd8\u9690\u5f0f\u7684,\u90a3\u4e48\u5b83\u7684\u7c7b\u7684\u4f5c\u7528\u57df\u5bf9Lambda\u51fd\u6570\u5c31\u662f\u53ef\u89c1\u7684. \u8bbf\u95eethis\u7684\u6210\u5458\u4e0d\u5fc5\u4f7f\u7528this-&gt;\u8bed\u6cd5,\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee.<br \/>\n\u4e0d\u540c\u7f16\u8bd1\u5668\u7684\u5177\u4f53\u5b9e\u73b0\u53ef\u4ee5\u6709\u6240\u4e0d\u540c,\u4f46\u671f\u671b\u7684\u7ed3\u679c\u662f:\u6309\u5f15\u7528\u6355\u83b7\u7684\u4efb\u4f55\u53d8\u91cf,lambda\u51fd\u6570\u5b9e\u9645\u5b58\u50a8\u7684\u5e94\u8be5\u662f\u8fd9\u4e9b\u53d8\u91cf\u5728\u521b\u5efa\u8fd9\u4e2alambda\u51fd\u6570\u7684\u51fd\u6570\u7684\u6808\u6307\u9488,\u800c\u4e0d\u662flambda\u51fd\u6570\u672c\u8eab\u6808\u53d8\u91cf\u7684\u5f15\u7528. \u4e0d\u7ba1\u600e\u6837, \u56e0\u4e3a\u5927\u6570lambda\u51fd\u6570\u90fd\u5f88\u5c0f\u4e14\u5728\u5c40\u90e8\u4f5c\u7528\u4e2d, \u4e0e\u5019\u9009\u7684\u5185\u8054\u51fd\u6570\u5f88\u7c7b\u4f3c, \u6240\u4ee5\u6309\u5f15\u7528\u6355\u83b7\u7684\u90a3\u4e9b\u53d8\u91cf\u4e0d\u9700\u8981\u989d\u5916\u7684\u5b58\u50a8\u7a7a\u95f4.<br \/>\n\u5982\u679c\u4e00\u4e2a\u95ed\u5305\u542b\u6709\u5c40\u90e8\u53d8\u91cf\u7684\u5f15\u7528,\u5728\u8d85\u51fa\u521b\u5efa\u5b83\u7684\u4f5c\u7528\u57df\u4e4b\u5916\u7684\u5730\u65b9\u88ab\u4f7f\u7528\u7684\u8bdd,\u8fd9\u79cd\u884c\u4e3a\u662f\u672a\u5b9a\u4e49\u7684!<br \/>\nlambda\u51fd\u6570\u662f\u4e00\u4e2a\u4f9d\u8d56\u4e8e\u5b9e\u73b0\u7684\u51fd\u6570\u5bf9\u8c61\u7c7b\u578b,\u8fd9\u4e2a\u7c7b\u578b\u7684\u540d\u5b57\u53ea\u6709\u7f16\u8bd1\u5668\u77e5\u9053. \u5982\u679c\u7528\u6237\u60f3\u628alambda\u51fd\u6570\u505a\u4e3a\u4e00\u4e2a\u53c2\u6570\u6765\u4f20\u9012, \u90a3\u4e48\u5f62\u53c2\u7684\u7c7b\u578b\u5fc5\u987b\u662f\u6a21\u677f\u7c7b\u578b\u6216\u8005\u5fc5\u987b\u80fd\u521b\u5efa\u4e00\u4e2astd::function\u7c7b\u4f3c\u7684\u5bf9\u8c61\u53bb\u6355\u83b7lambda\u51fd\u6570.\u4f7f\u7528 auto\u5173\u952e\u5b57\u53ef\u4ee5\u5e2e\u52a9\u5b58\u50a8lambda\u51fd\u6570,<\/p>\n<h2><a name=\"t2\"><\/a>3.auto<\/h2>\n<p>auto\u53ef\u4ee5\u8ba9\u7f16\u8bd1\u5668\u81ea\u52a8\u63a8\u65ad\u53d8\u91cf\u7c7b\u578b\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<ol class=\"hljs-ln\">\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"1\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; &gt; func(<span class=\"hljs-keyword\">int<\/span> a, <span class=\"hljs-keyword\">int<\/span> b);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"2\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-function\"><span class=\"hljs-keyword\">auto<\/span> <span class=\"hljs-title\">func<\/span><span class=\"hljs-params\">(<span class=\"hljs-number\">2<\/span>,<span class=\"hljs-number\">2<\/span>)<\/span><\/span>;<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<h2><a name=\"t3\"><\/a>4.\u4f8b\u5b50leetcode\u4e0a\u9762\u6709\u4e00\u9053\u9898\uff0c\u4ea7\u751f\u5168\u6392\u5217<\/h2>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<ol class=\"hljs-ln\">\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"1\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-class\"><span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title\">Solution<\/span> {<\/span><\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"2\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">public<\/span>:<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"3\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; &gt; permuteUnique(<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; &amp;num) {<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"4\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; &gt; result;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"5\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; empty;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"6\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">int<\/span> n=num.size();<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"7\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">if<\/span>(n==<span class=\"hljs-number\">0<\/span>){<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"8\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">result.push_back(empty);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"9\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">return<\/span> result;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"10\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">}<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"11\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; last(num.begin()+<span class=\"hljs-number\">1<\/span>, num.end());<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"12\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">auto<\/span> pre=permuteUnique(last);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"13\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">for<\/span>(<span class=\"hljs-keyword\">int<\/span> i=<span class=\"hljs-number\">0<\/span>;i&lt;n;i++){<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"14\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">for_each(pre.begin(), pre.end(), [n, num, i, &amp;result](<span class=\"hljs-built_in\">vector<\/span>&lt;<span class=\"hljs-keyword\">int<\/span>&gt; line){<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"15\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">line.insert(line.begin()+i, num[<span class=\"hljs-number\">0<\/span>]);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"16\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">result.push_back(line);<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"17\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">});<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"18\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">}<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"19\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\"><span class=\"hljs-keyword\">return<\/span> result;<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"20\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">}<\/div>\n<\/div>\n<\/li>\n<li>\n<div class=\"hljs-ln-numbers\">\n<div class=\"hljs-ln-line hljs-ln-n\" data-line-number=\"21\"><\/div>\n<\/div>\n<div class=\"hljs-ln-code\">\n<div class=\"hljs-ln-line\">};<\/div>\n<\/div>\n<\/li>\n<\/ol>\n<pre><code class=\"language-cpp hljs\"><\/code><\/pre>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>\u4ee3\u7801\u7b80\u6d01\u4e4b\u9053\uff1aC++ 11 \u4e4bauto+<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-1675","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1675","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=1675"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/1675\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=1675"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=1675"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=1675"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}