{"id":233,"date":"2020-01-28T18:01:30","date_gmt":"2020-01-28T10:01:30","guid":{"rendered":"https:\/\/www.notown.club\/?p=233"},"modified":"2020-01-29T16:36:43","modified_gmt":"2020-01-29T08:36:43","slug":"c-%e7%9a%84range-for","status":"publish","type":"post","link":"https:\/\/www.notown.top\/?p=233","title":{"rendered":"C++ \u7684range for"},"content":{"rendered":"\n<p>\u5bf9\u6570\u7ec4\u8fd9\u79cd\u591a\u4e2a\u540c\u7c7b\u578b\u5143\u7d20\u6784\u6210\u7684\u5e8f\u5217\u5bf9\u8c61\uff0c\u53ef\u4ee5\u7528range for \u904d\u5386\u5176\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n\n\n\n<p>\u6709\u4e24\u79cd\u5f62\u5f0f<br>1\u3001for(auto var:arr)<br>2\u3001for(auto &amp;var:arr)<br> \u7b2c\u4e00\u79cd\u5f62\u5f0f\uff0c\u53ea\u662f\u628aarr\u4e2d\u7684\u6bcf\u4e00\u4e2a\u5143\u7d20\u4f9d\u6b64\u8d4b\u503c\u7ed9var\uff0c\u4fee\u6539var\u4e0d\u80fd\u5f71\u54cd\u6570\u7ec4arr\uff0c\u800c\u7b2c\u4e8c\u79cd\u5f62\u5f0f\u662f\u901a\u8fc7\u5f15\u7528\u7684\u65b9\u6cd5\uff0c\u4f9d\u6b64\u7ed1\u5b9a\u6bcf\u4e00\u4e2a\u6570\u7ec4arr\u91cc\u7684\u5143\u7d20\uff0c\u8fbe\u5230\u4fee\u6539var\u5373\u53ef\u4fee\u6539\u6570\u7ec4\u91cc\u5143\u7d20\u672c\u8eab\u7684\u6548\u679c <\/p>\n\n\n\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff1a<br>\u7b2c\u4e8c\u79cd\u5f62\u5f0f\uff1a<br><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>int v&#91;] = { 1,2,3,4,5,6 };\nint i = 0;\nfor (int &amp;e : v)\n{\n    e *= 2;\/\/\u53ef\u901a\u8fc7e\u4e582\u5b9e\u73b0\u6570\u7ec4\u91cc\u6bcf\u4e2a\u5143\u7d20\u4e582\u500d\uff0c\u5982\u679c\u628a\u4e0a\u4e24\u884c\u4e2d\u7684&amp;\u53bb\u6389\u5219\u4e0d\u80fd\u4e86\n    cout &lt;&lt; v&#91;i] &lt;&lt; endl;\n    i++;\n}\n\/\/\u4f8b\u5b502\uff0c\u5d4c\u5957\u4f7f\u7528\nint sb&#91;4]&#91;5];\n\tint g = 0;\n\tfor (auto &amp;row : sb)\n\t{\n\t\tfor (auto&amp; ev : row)\/\/\u5d4c\u5957\uff0c\u7ed9\u5143\u7d20\u4f9d\u6b64\u8d4b\u4e88\u81ea\u7136\u6570\u3002\n\t\t{\n\t\t\tev = g;\n\t\t\tg++;\n\t\t}\n\t}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u5bf9\u6570\u7ec4\u8fd9\u79cd\u591a\u4e2a\u540c\u7c7b\u578b\u5143\u7d20\u6784\u6210\u7684\u5e8f\u5217\u5bf9\u8c61\uff0c\u53ef\u4ee5\u7528range for \u904d\u5386\u5176\u4e2d\u7684\u5143\u7d20\u3002 \u6709\u4e24\u79cd\u5f62\u5f0f1\u3001for(au&hellip;<a href=\"https:\/\/www.notown.top\/?p=233\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">C++ \u7684range for<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[11],"tags":[],"class_list":["post-233","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/233","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=233"}],"version-history":[{"count":3,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/233\/revisions"}],"predecessor-version":[{"id":237,"href":"https:\/\/www.notown.top\/index.php?rest_route=\/wp\/v2\/posts\/233\/revisions\/237"}],"wp:attachment":[{"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=233"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=233"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.notown.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=233"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}