{"id":579,"date":"2024-09-28T11:15:26","date_gmt":"2024-09-28T03:15:26","guid":{"rendered":"http:\/\/114.55.108.251\/?p=579"},"modified":"2025-01-03T18:56:50","modified_gmt":"2025-01-03T10:56:50","slug":"c11%e6%96%b0%e7%89%b9%e6%80%a7","status":"publish","type":"post","link":"https:\/\/guapicoding.com\/?p=579","title":{"rendered":"C++11\u5e38\u7528\u65b0\u7279\u6027"},"content":{"rendered":"\n<p><a href=\"https:\/\/zhuanlan.zhihu.com\/p\/139515439\">https:\/\/zhuanlan.zhihu.com\/p\/139515439<\/a><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8303\u56f4\u57fafor\u5faa\u73af <\/h3>\n\n\n\n<p>\u8303\u56f4\u57fafor\u5faa\u73af\uff08Range-based for loop\uff09\u662f C++11 \u5f15\u5165\u7684\u4e00\u79cd\u7b80\u5316\u7684\u5faa\u73af\u7ed3\u6784\uff0c\u7528\u4e8e\u904d\u5386\u5bb9\u5668\uff08\u5982\u6570\u7ec4\u3001\u5411\u91cf\u3001\u96c6\u5408\u3001\u6620\u5c04\u7b49\uff09\u4e2d\u7684\u5143\u7d20<\/p>\n\n\n\n<p>\u57fa\u672c\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>for (declaration : container) {\n    \/\/ \u5bf9\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u7684\u64cd\u4f5c\n}<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>declaration<\/strong>\uff1a\u8fd9\u91cc\u662f\u4e00\u4e2a\u7c7b\u578b\u5b9a\u4e49\uff0c\u901a\u5e38\u4f7f\u7528<code>auto<\/code>\u81ea\u52a8\u63a8\u5bfc\u6570\u636e\u7c7b\u578b\uff0c\u4f7f\u7528const\u9632\u6b62\u4fee\u6539\u539f\u6570\u636e\uff0c\u5e76\u53ef\u4ee5\u4f7f\u7528\u5f15\u7528\u6765\u907f\u514d\u590d\u5236<\/li>\n\n\n\n<li><strong>container<\/strong>\uff1a\u8981\u904d\u5386\u7684\u5bb9\u5668\u5bf9\u8c61<\/li>\n<\/ul>\n\n\n\n<p>\u793a\u4f8b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>vector&lt;int&gt; v = {1, 2, 3, 4, 5}; \/\/\u904d\u5386vector\u5bb9\u5668\nfor(const auto &amp;num : v) {\n    cout &lt;&lt; num &lt;&lt; endl;\n}<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>unordered_map&lt;string, int&gt; mp = {{\"Alice\", 30}, {\"Bob\", 25}}; \nfor(const auto &amp;&#91;name, age] : mp) {\n    cout &lt;&lt; name &lt;&lt; \": \" &lt;&lt; age &lt;&lt; endl;  \n}\n\/\/\u5982\u679c\u4e0d\u5728\u610fkey\u6216\u8005value\uff0c\u53ef\u7528\u5360\u4f4d\u7b26_\u5ffd\u7565\u5176\u4e2d\u4e00\u9879\nfor(const auto &amp;&#91;_, age] : mp) {\n    cout &lt;&lt; age &lt;&lt; endl;\n}\n    <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>https:\/\/zhuanlan.zhihu.com\/p\/139515439 \u8303\u56f4\u57fafor\u5faa\u73af \u8303\u56f4\u57fafor\u5faa [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[71,28],"class_list":["post-579","post","type-post","status-publish","format-standard","hentry","category-cpp","tag-c11","tag-28"],"_links":{"self":[{"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/posts\/579","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guapicoding.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=579"}],"version-history":[{"count":3,"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/posts\/579\/revisions"}],"predecessor-version":[{"id":2254,"href":"https:\/\/guapicoding.com\/index.php?rest_route=\/wp\/v2\/posts\/579\/revisions\/2254"}],"wp:attachment":[{"href":"https:\/\/guapicoding.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guapicoding.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guapicoding.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}