{"id":2287,"date":"2023-12-01T20:02:05","date_gmt":"2023-12-01T12:02:05","guid":{"rendered":"https:\/\/courtship.top\/?p=2287"},"modified":"2023-12-01T20:02:05","modified_gmt":"2023-12-01T12:02:05","slug":"%e4%b8%80%e4%b8%aastring%ef%bc%8c%e5%88%b0%e5%ba%95%e6%9c%89%e5%a4%9a%e5%a4%a7%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/courtship.top\/index.php\/2023\/12\/01\/%e4%b8%80%e4%b8%aastring%ef%bc%8c%e5%88%b0%e5%ba%95%e6%9c%89%e5%a4%9a%e5%a4%a7%ef%bc%9f\/","title":{"rendered":"\u4e00\u4e2aString\uff0c\u5230\u5e95\u6709\u591a\u5927\uff1f"},"content":{"rendered":"\n<p>\u5982\u679c\u76f4\u63a5\u7528sizeof\u8f93\u51fa\u7684\u8bdd\uff0c\u4e00\u822cstd::string\u4e0eFString\u90fd\u662f32\u5b57\u8282<strong>\u5927\u5c0f<\/strong>\u3002<\/p>\n\n\n\n<p>\u4f46\u662f\u6b63\u5e38\u8981\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\uff0c\u8981\u6c42\u5f97\u7684\u90fd\u662f\u5b57\u7b26\u4e32\u7684\u5185\u5b58\u5927\u5c0f\u3002\u8981\u83b7\u53d6\u5b9e\u9645\u7684\u5927\u5c0f\uff0c\u9700\u8981\u83b7\u53d6\u957f\u5ea6*\u5355\u4e2a\u5b57\u7b26\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>    std::string x = \"abcdefg\";\n    std::string xx = \"cdefgabcdefgab\";\n    std::string xxx = \"222222wiajnduhaiudhaidijanduianduihq0uwd019duaqhdnandaojwd01uw-   9du2-9dandnad-1=djjanidnjknsklanodjnoaihwd01h0h912ue-92hdhada\";\n\n    std::cout &lt;&lt; sizeof(x) &lt;&lt; \"|\" &lt;&lt; x.size() &lt;&lt; std::endl;\n    std::cout &lt;&lt; sizeof(xx) &lt;&lt; \"|\" &lt;&lt; xx.size() &lt;&lt; std::endl;\n    std::cout &lt;&lt; sizeof(xxx) &lt;&lt; \"|\" &lt;&lt; xxx.size() &lt;&lt; std::endl;\n\n    size_t x_size = sizeof(char) * x.size();<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e3a\u4ec0\u4e48\u4ed6\u4eec\u662f\u4e0d\u540c\u5927\u5c0f\uff1f<\/h3>\n\n\n\n<p>\u5728C++\u4e2d\uff0c\u4f7f\u7528 sizeof \u8fd0\u7b97\u7b26\u53ef\u4ee5\u83b7\u53d6\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u5185\u5bb9\u6240\u9700\u7684\u5185\u5b58\u4ee5\u53ca\u7528\u4e8e\u7ba1\u7406\u5b57\u7b26\u4e32\u7684\u4e00\u4e9b\u5143\u6570\u636e\u3002\u5bf9\u4e8e std::string \u7c7b\u578b\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0csizeof(std::string) \u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u5b57\u7b26\u4e32\u5185\u5bb9\u7684\u5927\u5c0f\u3002<\/p>\n\n\n\n<p>\u800c\u5173\u4e8e\u5b57\u7b26\u4e32\u5185\u5bb9\u7684\u5b9e\u9645\u5927\u5c0f\uff0c\u5b83\u53d6\u51b3\u4e8e\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u548c\u5b57\u7b26\u4e32\u6240\u4f7f\u7528\u7684\u5b58\u50a8\u65b9\u5f0f\u3002\u5bf9\u4e8e std::string \u7c7b\u578b\u7684\u5b57\u7b26\u4e32\uff0c\u5b83\u4f1a\u6839\u636e\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u52a8\u6001\u5206\u914d\u6240\u9700\u7684\u5185\u5b58\u7a7a\u95f4\u6765\u5b58\u50a8\u5b57\u7b26\u4e32\u5185\u5bb9\u3002\u5b9e\u9645\u7684\u5b57\u7b26\u4e32\u5185\u5bb9\u5927\u5c0f\u4f1a\u6839\u636e\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u800c\u53d8\u5316\uff0c\u6bd4\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\u8981\u5927\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p>\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\u662f\u6307\u5b57\u7b26\u4e32\u5bf9\u8c61\u5360\u7528\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u5305\u62ec\u5b57\u7b26\u4e32\u5185\u5bb9\u6240\u9700\u7684\u5185\u5b58\u4ee5\u53ca\u7528\u4e8e\u7ba1\u7406\u5b57\u7b26\u4e32\u7684\u5143\u6570\u636e\u3002\u5bf9\u4e8e std::string \u7c7b\u578b\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528 sizeof(std::string) \u6765\u83b7\u53d6\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\u3002<br \/>\u5b57\u7b26\u4e32\u5185\u5bb9\u7684\u5b9e\u9645\u5927\u5c0f\u662f\u6307\u5b57\u7b26\u4e32\u5185\u5bb9\u6240\u5360\u7528\u7684\u5185\u5b58\u5927\u5c0f\uff0c\u5b83\u53d6\u51b3\u4e8e\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u548c\u6240\u4f7f\u7528\u7684\u5b58\u50a8\u65b9\u5f0f\u3002\u5bf9\u4e8e std::string \u7c7b\u578b\u7684\u5b57\u7b26\u4e32\uff0c\u5b9e\u9645\u7684\u5b57\u7b26\u4e32\u5185\u5bb9\u5927\u5c0f\u4f1a\u6839\u636e\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u800c\u53d8\u5316\u3002<\/p>\n\n\n\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5bf9\u4e8e std::string \u7c7b\u578b\u7684\u5b57\u7b26\u4e32\uff0c\u5b83\u4f1a\u4f7f\u7528\u52a8\u6001\u5185\u5b58\u5206\u914d\u6765\u7ba1\u7406\u5b57\u7b26\u4e32\u5185\u5bb9\uff0c\u56e0\u6b64\u5b9e\u9645\u7684\u5b57\u7b26\u4e32\u5185\u5bb9\u5927\u5c0f\u53ef\u80fd\u4f1a\u6bd4\u5b57\u7b26\u4e32\u5bf9\u8c61\u672c\u8eab\u7684\u5927\u5c0f\u8981\u5927\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5982\u679c\u76f4\u63a5\u7528sizeof\u8f93\u51fa\u7684\u8bdd\uff0c\u4e00\u822cstd::string\u4e0eFString\u90fd\u662f32\u5b57\u8282\u5927\u5c0f\u3002 \u4f46\u662f\u6b63\u5e38\u8981\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\uff0c\u8981\u6c42\u5f97\u7684 &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-2287","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/2287","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/comments?post=2287"}],"version-history":[{"count":0,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/2287\/revisions"}],"wp:attachment":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/media?parent=2287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/categories?post=2287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/tags?post=2287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}