{"id":2191,"date":"2022-02-17T19:53:04","date_gmt":"2022-02-17T11:53:04","guid":{"rendered":"https:\/\/guerilla.ddns.net\/wp\/?p=2191"},"modified":"2025-08-22T22:33:24","modified_gmt":"2025-08-22T14:33:24","slug":"char-wchar_t-string-%e8%bd%89%e6%8f%9b","status":"publish","type":"post","link":"https:\/\/guerilla.ddns.net\/wp\/?p=2191","title":{"rendered":"char \/ wchar_t string \u8f49\u63db"},"content":{"rendered":"<h2>char string convert to wchar_t string:<\/h2>\n<pre><code class=\"language-cpp\" data-line=\"\">size_t mbstowcs(\n   wchar_t *wcstr,\n   const char *mbstr,\n   size_t count\n);<\/code><\/pre>\n<p>count \u8868\u793a wcstr (\u63a5\u6536) \u6709\u591a\u5c11\u6578\u91cf\uff0c\u5982\u679c count \u70ba 3 \u5247\u8868\u793a wcstr \u7684\u9577\u5ea6\u70ba 3 \u500b wchar_t<\/p>\n<p>\u56de\u50b3\u503c\u70ba\u8f49\u63db\u4e86\u591a\u5c11\u500b\u5b57\u5143<\/p>\n<p>\u5982\u679c wcstr \u70ba NULL (\u7576\u7136 count \u70ba 0)\uff0c\u5247\u8868\u793a\u6211\u5011\u53ea\u662f\u8981\u6e2c\u5f97 mbstr \u8f49\u63db\u6210 wcstr \u9700\u8981\u591a\u5c11\u500b count\uff0c\u7136\u5f8c\u518d\u53bb new \u51fa count + 1 \u500b wchar_t<\/p>\n<pre><code class=\"language-cpp\" data-line=\"\">char mbstr[] = &quot;\u54c8\u56c9 \u5927\u5bb6\u597d&quot;;\nsize_t required = mbstowcs(NULL, mbstr, 0);\nwchar_t* wcstr = new wchar_t [required + 1];\nsize_t size = mbstowcs(wcstr, mbstr, required + 1);<\/code><\/pre>\n<p>&nbsp;<\/p>\n<h2>wchar_t string convert to char string:<\/h2>\n<pre><code class=\"language-cpp\" data-line=\"\">size_t wcstombs(\n   char *mbstr,\n   const wchar_t *wcstr,\n   size_t count\n);<\/code><\/pre>\n<p>count \u8868\u793a mbstr (\u63a5\u6536) \u6709\u591a\u5c11\u6578\u91cf\uff0c\u5982\u679c count \u70ba 3 \u5247\u8868\u793a mbstr \u7684\u9577\u5ea6\u70ba 3 \u500b char<\/p>\n<p>\u56de\u50b3\u503c\u70ba\u8f49\u63db\u4e86\u591a\u5c11\u500b\u5b57\u5143<\/p>\n<p>\u5982\u679c mbstr \u70ba NULL (\u7576\u7136 count \u70ba 0)\uff0c\u5247\u8868\u793a\u6211\u5011\u53ea\u662f\u8981\u6e2c\u5f97 wcstr \u8f49\u63db\u6210 mbstr \u9700\u8981\u591a\u5c11\u500b count\uff0c\u7136\u5f8c\u518d\u53bb new \u51fa count + 1 \u500b char<\/p>\n<pre><code class=\"language-cpp\" data-line=\"\">wchar_t wcstr[] = L&quot;\u54c8\u56c9 \u5927\u5bb6\u597d&quot;;\nsize_t required = wcstombs(NULL, wcstr, 0);\nchar_t* mbstr = new char [required + 1];\nsize_t size = wcstombs(mbstr, wcstr, required + 1);<\/code><\/pre>\n<p>&nbsp;<\/p>\n<p>&nbsp;<br \/>\nref:<br \/>\n\u2022 <a href=\"https:\/\/docs.microsoft.com\/en-us\/cpp\/c-runtime-library\/reference\/mbstowcs-mbstowcs-l\" rel=\"noopener\" target=\"_blank\"><em>mbstowcs\u3001_mbstowcs_l | Microsoft Docs<\/em><\/a><br \/>\n\u2022 <a href=\"https:\/\/docs.microsoft.com\/en-us\/cpp\/c-runtime-library\/reference\/wcstombs-wcstombs-l\" rel=\"noopener\" target=\"_blank\"><em>wcstombs\u3001_wcstombs_l | Microsoft Docs<\/em><\/a><\/p>\n<p>&nbsp;<br \/>\n#C++ #coding #convert #UTF8 #unicode<\/p>\n","protected":false},"excerpt":{"rendered":"<p>char string convert to wchar_t string: size_t mbstowcs( [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[212],"tags":[85,27],"class_list":["post-2191","post","type-post","status-publish","format-standard","hentry","category-coding","tag-c","tag-coding"],"_links":{"self":[{"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2191","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2191"}],"version-history":[{"count":16,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2191\/revisions"}],"predecessor-version":[{"id":3385,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=\/wp\/v2\/posts\/2191\/revisions\/3385"}],"wp:attachment":[{"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2191"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2191"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/guerilla.ddns.net\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2191"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}