{"id":57890,"date":"2025-08-15T22:10:29","date_gmt":"2025-08-15T14:10:29","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/57890.html"},"modified":"2025-08-15T22:10:29","modified_gmt":"2025-08-15T14:10:29","slug":"string%e7%b1%bb-%e6%89%8b%e5%8a%a8%e5%ae%9e%e7%8e%b0","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/57890.html","title":{"rendered":"string\u7c7b \u624b\u52a8\u5b9e\u73b0"},"content":{"rendered":"<p>c&#043;&#043;\u59d4\u5458\u4f1a\u5728std\u547d\u540d\u7a7a\u95f4\u4e2d\u5b9a\u4e49\u4e86string\u7c7b \u5728\u7c7b\u4e2d\u5b9e\u73b0\u4e86\u8bb8\u591a\u5bf9\u5916\u7684\u5f88\u591a\u63a5\u53e3\u00a0<\/p>\n<p>\u4e4b\u524d\u8bd5\u8fc7\u4e86string\u7c7b\u63a5\u53e3\u7684\u4f7f\u7528 \u63a5\u4e0b\u6765\u81ea\u5df1\u6765\u624b\u52a8\u5b9e\u73b0\u4e00\u4e0b\u4e8e\u8fd9\u6837\u7684string\u7c7b \u5e76\u4e0d\u662f\u771f\u7684\u548c\u5e93\u4e2d\u7684\u4e00\u6837 \u53ea\u662f\u5927\u6982\u5b9e\u73b0\u4e00\u4e9b\u529f\u80fd 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loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"214\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141017-689f3fc99226b.png\" width=\"491\" \/><\/p>\n<p>\u62f7\u8d1d\u6784\u9020\u7c7b\u4f3c \u5982\u679c\u4e0d\u81ea\u5df1\u5199\u62f7\u8d1d\u9ed8\u8ba4\u7684\u62f7\u8d1d\u662f\u6d45\u62f7\u8d1d \u4e0d\u6ee1\u8db3\u6211\u4eec\u7684\u9700\u6c42<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"150\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141018-689f3fca3681d.png\" width=\"385\" \/><\/p>\n<p>\u8d4b\u503c\u91cd\u8f7d&#061;\u4e5f\u90fd\u7c7b\u4f3c \u4f46\u662f\u8981\u8bb0\u5f97 delete\u539f\u6765\u7684\u7a7a\u95f4<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"237\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141018-689f3fcac75a9.png\" width=\"607\" \/><\/p>\n<h2>\u8fed\u4ee3\u5668<\/h2>\n<p>std\u4e2dstring\u7c7b\u5b9e\u9645\u7684\u8fed\u4ee3\u5668\u8fd8\u662f\u5f88\u590d\u6742\u7684 \u8fd9\u91cc\u5c31\u7b80\u5355\u7684\u6765\u5b9e\u73b0\u00a0 \u00a0\u00a0<\/p>\n<p>\u8fd9\u91cciterator\u5c31\u662fchar*\u7c7b\u578b\u7684\u522b\u540d\u00a0 \u00a0 begin\u8fd4\u56de\u7b2c\u4e00\u4e2a\u4f4d\u7f6e end\u8fd4\u56de\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u540e\u4e00\u4e2a\u4f4d\u7f6e<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"230\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141019-689f3fcb64770.png\" width=\"308\" \/><\/p>\n<p>\u5728\u7c7b\u5185\u91cd\u5b9a\u4e49\u7684\u540d\u5b57 \u5728\u7c7b\u5916\u9700\u8981\u7528string::\u6765\u8fdb\u884c\u8bbf\u95ee \u5f53\u8fed\u4ee3\u5668\u5b9e\u73b0\u4e4b\u540e \u8303\u56f4for\u5c31\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4e86 \u56e0\u4e3a\u8303\u56f4for\u7684\u5e95\u5c42\u5b9e\u73b0\u5176\u5b9e\u5c31\u662f\u8fed\u4ee3\u5668<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"266\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141019-689f3fcbed08e.png\" width=\"389\" \/><\/p>\n<p>npos<\/p>\n<p>\u6b63\u5e38\u60c5\u51b5\u5728\u7c7b\u91cc\u9762\u58f0\u660e\u65f6\u5019\u7684\u521d\u59cb\u503c\u53ea\u5728\u521d\u59cb\u5316\u5217\u8868\u4e2d\u6ca1\u6709\u5b9a\u4e49\u65f6\u5019\u4f1a\u770b\u00a0 \u4f46\u662f\u5bf9\u4e8e\u9759\u6001\u7684\u4e0d\u80fd\u5728\u521d\u59cb\u5316\u5217\u8868\u5199\u53c8\u00a0 \u4f46\u662f\u5728\u8fd9\u91ccnpos\u53ef\u4ee5\u76f4\u63a5\u5728\u8fd9\u91cc\u521d\u59cb\u5316\u4e3a-1\u00a0 \u00a0\u8fd9\u662f\u975e\u5e38\u7279\u6b8a\u7684\u60c5\u51b5 \u53ea\u6709\u5728\u662fstatic \u4e14const \u4e14\u6574\u5f62\u7c7b\u578b\u624d\u53ef\u4ee5\u00a0 \u00a0\u8fd9\u79cd\u975e\u5e38\u7279\u6b8a\u53ef\u80fd\u662f\u4e3a\u4e86 static const int N \u7136\u540e\u8fd9\u6837\u7528N\u5b9a\u4e49\u6570\u7ec4\u7684\u65b9\u5f0f<\/p>\n<p>\u00a0\u8fd9\u91ccnpos\u662fsize_t\u65e0\u7b26\u53f7\u6574\u5f62\u00a0 \u521d\u59cb\u5316\u4e3a-1\u8865\u7801\u4e3a\u6700\u5927\u503cnpos\u5c31\u662f\u6700\u5927\u503c\u00a0 \u00a0<\/p>\n<p>\u8fd9\u91cc\u5c31\u7528\u6b63\u5e38\u7684\u5728\u7c7b\u5916\u5b9a\u4e49static\u53d8\u91cf\u7684\u65b9\u5f0f\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"181\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141020-689f3fcc83d9d.png\" width=\"459\" \/><\/p>\n<p>\u5bf9\u4e8e\u77ed\u5c0f\u9891\u7e41\u8c03\u7528\u7684\u51fd\u6570&#xff0c;\u53ef\u4ee5\u76f4\u63a5\u5b9a\u4e49\u5230\u7c7b\u91cc\u9762\u6765\u5b9e\u73b0&#xff0c;\u9ed8\u8ba4\u662finline<\/p>\n<p>\u5bf9\u4e8e\u6bd4\u8f83\u957f\u7684\u5728\u7c7b\u5185\u58f0\u660e \u7136\u540e\u5728string.cpp\u6587\u4ef6\u4e2d\u6765\u5b9e\u73b0<\/p>\n<h2>string\u7c7b\u5bf9\u8c61\u7684\u5bb9\u91cf<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"469\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141020-689f3fccf19fb.png\" width=\"453\" \/><\/p>\n<p>\u8fd9\u91cc\u6ce8\u610f \u5728string.cpp\u6587\u4ef6\u4e2d \u540c\u6837\u8981\u628a\u5b9e\u73b0\u7684\u529f\u80fd\u653e\u5230\u548cstring.h\u540c\u540d\u7684\u547d\u540d\u7a7a\u95f4\u91cc\u9762 \u5728test\u6d4b\u8bd5\u6587\u4ef6\u4e2d\u540c\u6837\u4e5f\u662f \u7f16\u8bd1\u5668\u6700\u540e\u4f1a\u628a\u4e0d\u540c\u6587\u4ef6\u4e2d\u540c\u540d\u7684\u547d\u540d\u7a7a\u95f4\u5185\u5bb9\u5408\u8d77\u6765\u00a0 \u5982\u679c\u5728string.cpp\u4e2d\u4e0d\u7528\u547d\u540d\u7a7a\u95f4 \u8981\u5b9e\u73b0\u6bcf\u4e00\u4e2a\u51fd\u6570\u8fd8\u9700\u8981\u52a0\u547d\u540d\u7a7a\u95f4\u540d\u5b57 \u6211\u8fd9\u91cc\u662fxx::<\/p>\n<h3>resize\u53careserve\u5b9e\u73b0<\/h3>\n<p>reserve\u5f53n&lt;&#061;capacity\u7684\u65f6\u5019\u4e0d\u505a\u5904\u7406\u00a0 \u00a0\u5f53\u5927\u4e8e\u7684\u65f6\u5019\u518d\u8fdb\u884c\u6269\u5bb9 \u5f00n&#043;1\u4e2a\u7a7a\u95f4\u7684\u65b0zz \u628a\u4e4b\u524d\u5185\u5bb9\u62f7\u8d1d\u4e4b\u540edelete \u539f\u6765\u7684\u7a7a\u95f4 \u518d\u6307\u5411\u65b0\u7684zz<\/p>\n<p>resize \u8981\u5206n&lt;size\u7684\u60c5\u51b5\u548cn&gt;size\u7684\u60c5\u51b5\u00a0<\/p>\n<p>\u5f53n&lt;\u5c0f\u4e8esize\u7684\u65f6\u5019 \u4e5f\u5c31\u662f\u8981\u628a\u957f\u5ea6\u7f29\u5c0f\u81f3n \u4e0d\u5220\u7684\u5185\u5bb9\u4e0b\u6807\u4ece0\u5230n-1 \u90a3\u4e48n\u7684\u4f4d\u7f6e\u4e5f\u5c31\u662f\\\\0\u7684\u4f4d\u7f6e \u7136\u540e\u4e4b\u540e\u6539\u53d8size\u5c31\u53ef\u4ee5<\/p>\n<p>\u5f53n&gt;size\u7684\u65f6\u5019\u00a0 \u5148\u8003\u8651\u7a7a\u95f4\u7684\u95ee\u9898 \u957f\u5ea6\u8981\u589e\u957f\u5230\u4e3an \u5219\u9884\u7559n\u5927\u5c0f\u7684\u7a7a\u95f4 \u7136\u540e\u4ecesize\u5f00\u59cb&#xff08;\u4e4b\u524d\\\\0\u7684\u4f4d\u7f6e&#xff09;\u76f4\u5230n-1\u4f4d\u7f6e\u4e5f\u4e3a\u66ff\u6362\u7684\u5b57\u7b26c\u00a0 \u7136\u540en\u4f4d\u7f6e\u8bbe\u4e3a\\\\0\u00a0<\/p>\n<p>\u8fd9\u91cc\u7f3a\u7701\u503c\u4e3a\u2018\\\\0\u2019 \u8981\u6ce8\u610f\u58f0\u660e\u5b9a\u4e49\u5206\u79bb\u7684\u65f6\u5019\u7f3a\u7701\u503c\u5728\u58f0\u660e\u51fa\u5199\u00a0 \u5b9a\u4e49\u4e0d\u7528\u5199<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"515\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141021-689f3fcdbb409.png\" width=\"601\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"520\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141022-689f3fce74ed7.png\" width=\"650\" \/><\/p>\n<h2>string\u7c7b\u5bf9\u8c61\u7684\u4fee\u6539\u64cd\u4f5c<\/h2>\n<h3>\u63d2\u5165<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"240\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141023-689f3fcf13b65.png\" width=\"514\" \/><\/p>\n<p>\u8fd9\u91ccappend\u4ec5\u4ec5\u53ea\u5b9e\u73b0 \u63d2\u5165\u5b57\u7b26\u4e32\u5f62\u5f0f insert\u63d0\u4f9b\u63d2\u5165\u5b57\u7b26\u548c\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f &#043;&#061;\u5b9e\u73b0\u5b57\u7b26\u548c\u5b57\u7b26\u4e32\u5f62\u5f0f<\/p>\n<p>\u5176\u5b9epush_back \u548c&#043;&#061;\u4e00\u4e2a\u5b57\u7b26\u662f\u4e00\u6837\u7684\u00a0 append\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e5f\u548c&#043;&#061;\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u4e00\u6837\u7684 \u53ea\u9700\u5199\u4e00\u4e2a\u53e6\u4e00\u4e2a\u76f4\u63a5\u8d4b\u7528\u5c31\u53ef\u4ee5\u4e86<\/p>\n<h4>push_back &#043;&#061;\u5b57\u7b26<\/h4>\n<p>\u63d2\u5165\u4e4b\u524d\u6211\u4eec\u8981\u5148\u8003\u8651\u7a7a\u95f4\u95ee\u9898\u00a0 \u8fd9\u91cc\u662f\u4e00\u4e2a\u4e00\u4e2a\u5b57\u7b26\u63d2\u5165 \u53ef\u80fd\u4f1a\u88ab\u9891\u7e41\u8c03\u7528 \u5982\u679c\u53ea\u662f\u6309\u9700\u6269\u5bb9\u7684\u8bdd\u4f1a\u9020\u6210\u9891\u7e41\u6269\u5bb9 \u6240\u6709\u8fd9\u91cc\u91c7\u7528\u4e8c\u500d\u6269\u7684\u65b9\u5f0f<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"375\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141023-689f3fcfd2de9.png\" width=\"967\" \/><\/p>\n<h4>&#043;&#061;\u5b57\u7b26\u4e32 append<\/h4>\n<p>\u540c\u6837\u9996\u5148\u8003\u8651\u7a7a\u95f4\u6269\u5bb9\u00a0 \u56e0\u4e3a\u8fd9\u91cc\u63d2\u5165\u7684\u5b57\u7b26\u4e32\u4e0d\u77e5\u9053\u591a\u957f \u6240\u6709\u6211\u4eec\u6309\u9700\u6269\u5bb9\u5c31\u53ef\u4ee5\u00a0<\/p>\n<p>\u7136\u540e\u5c06\u5b57\u7b26\u4e32\u7684\u5185\u5bb9\u62f7\u8d1d\u5230\u672b\u5c3e \u7136\u540e\u6539\u53d8size\u53ca\u6700\u540e\u52a0\u4e0a\\\\0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"403\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141024-689f3fd0a3ccc.png\" width=\"567\" \/><\/p>\n<h4>insert \u63d2\u5165\u5355\u5b57\u7b26<\/h4>\n<p>insert\u548c\u5176\u4ed6\u63d2\u5165\u4e0d\u540c\u7684\u662f\u53ef\u4ee5\u9009\u62e9\u63d2\u5165\u7684\u4f4d\u7f6e\u00a0 \u4e3a\u4e86\u9632\u6b62\u8d8a\u754c\u8bbf\u95ee \u9996\u5148\u9700\u8981\u65ad\u8a00\u4e00\u4e0b\u4f20\u8fc7\u6765\u7684pos\u662f\u5426\u5408\u6cd5 \u56e0\u4e3a\u662fsize_t\u7c7b\u578b \u80af\u5b9a\u4e0d\u4f1a\u5c0f\u4e8e0 \u53ea\u9700\u518d&lt;&#061;size\u5c31\u53ef\u4ee5\u4e86\u00a0 &#061;size\u5c31\u662f\u5c3e\u63d2<\/p>\n<p>\u7a7a\u95f4\u6269\u5bb9\u95ee\u9898\u548c\u4e0a\u9762\u7684\u5c3e\u63d2\u5355\u5b57\u7b26\u4e00\u6837<\/p>\n<p>\u7136\u540e\u8fd9\u91cc\u63d2\u5165\u5b57\u7b26\u4e4b\u524d\u9700\u8981\u5148\u5c06\u540e\u9762\u7684\u5185\u5bb9\u6574\u4f53\u5411\u540e\u79fb\u52a8\u4e00\u4e2a\u4f4d\u7f6e\u00a0 \u00a0\u8fd9\u91cc\u770b\u79fb\u52a8\u4e0d\u79fb\u52a8\u6700\u540e\u7684\\\\0<\/p>\n<p>\u5982\u679c\u5f00\u59cb\u5c31\u79fb\u52a8\u7684\u8bdd \u6700\u540e\u5c31\u4e0d\u9700\u8981\u989d\u5916\u52a0\\\\0\u4e86\u00a0 \u5982\u679c\u6ca1\u6709\u79fb\u52a8 \u6700\u540e\u8981\u5728\u672b\u5c3e\u52a0\u4e0a \u5f00\u59cb\u6ca1\u6709\u79fb\u52a8\\\\0\u540e\u9762\u79fb\u52a8\u8fc7\u7a0b\u4e2d\u628a\\\\0\u7ed9\u66ff\u6362\u6389\u540e\u4f1a\u663e\u793a\u5b57\u7b26\u4e32\u65e0\u6548\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"28\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141025-689f3fd18867a.png\" width=\"590\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"322\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141025-689f3fd1e071c.png\" width=\"800\" \/><\/p>\n<h4>insert \u63d2\u5165\u5b57\u7b26\u4e32<\/h4>\n<p>\u65ad\u8a00\u548c\u7a7a\u95f4\u95ee\u9898\u90fd\u548c\u524d\u9762\u7684\u4e00\u6837 \u79fb\u52a8\u4e5f\u548c\u5355\u5b57\u7b26\u63d2\u5165\u7684insert\u7c7b\u578b \u79fb\u52a8\u4e4b\u540e\u8fdb\u884c\u62f7\u8d1d\u8981\u6ce8\u610f\u4e0d\u80fd\u7528strcpy\u00a0 strcpy\u4e5f\u4f1a\u628a\u5b57\u7b26\u4e32ss\u7684\\\\0\u7ed9\u62f7\u8d1d \u5982\u679c\u63d2\u5165\u7684\u4f4d\u7f6e\u9760\u524d\u90a3\u4e48\u540e\u9762\u539f\u6765\u7684\u5185\u5bb9\u5c31\u6ca1\u4e86<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"486\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141026-689f3fd2c9ef1.png\" width=\"560\" \/><\/p>\n<h3>\u5220\u9664<\/h3>\n<h4>erase<\/h4>\n<p>\u540c\u6837pos\u9700\u8981\u65ad\u8a00\u4e00\u4e0b\u00a0<\/p>\n<p>\u7136\u540e\u8981\u5206\u60c5\u51b5\u8003\u8651<\/p>\n<p>\u4ecepos\u5f00\u59cb\u5230\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u957f\u5ea6\u5982\u679c\u5c0f\u4e8e\u7b49\u4e8elen\u00a0 \u4e5f\u5c31\u662f\u8bf4\u540e\u9762\u4f1a\u76f4\u63a5\u5220\u5b8c \u90a3\u4e48\u4e45\u4e0d\u9700\u8981\u989d\u5916\u7684\u79fb\u52a8\u4e86 pos\u4f4d\u7f6e\u4e3a&#039;\\\\0&#039; \u7136\u540e\u6539\u53d8size\u5c31\u53ef\u4ee5<\/p>\n<p>\u5f53\u5927\u4e8elen\u7684\u65f6\u5019\u00a0 pos\u4e4b\u540e\u5269\u4f59\u7684\u5143\u7d20\u5c31\u9700\u8981\u6574\u4f53\u5411\u5de6\u79fb\u52a8 \u5269\u4f59\u7684\u4e2a\u6570\u4e3asize-pos-len \u79fb\u52a8\u7684\u957f\u5ea6\u5c31\u662f\u5220\u7684\u957f\u5ea6len<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"366\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141027-689f3fd37c47e.png\" width=\"681\" \/><\/p>\n<p>\u5982\u4e0b\u56fe\u9488\u5bf9\u7b2c\u4e8c\u79cd\u60c5\u51b5\u56fe\u6765\u7406\u89e3\u00a0 \u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u5220\u4e24\u4e2a\u5143\u7d20 \u4e5f\u5c31\u662f\u540e\u9762\u6700\u540e\u4f1a\u5269\u4e0b3 4 5 \u8fd9\u4e09\u4e2a\u5143\u7d20\u00a0 \u00a0\u8fd9\u4e09\u4e2a\u5269\u4e0b\u7684\u5143\u7d20\u9700\u8981\u6574\u4f53\u5411\u5de6\u79fb\u52a8\u5220\u6389\u7684\u957f\u5ea6\u4e5f\u5c31\u662flen\u4e2a\u4f4d\u7f6e \u8fd9\u68373\u5230\u4e861 4\u5230\u4e862\u00a0 5\u5230\u4e863<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"230\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141028-689f3fd403eba.png\" width=\"485\" \/><\/p>\n<h3>\u67e5\u627e\u00a0<\/h3>\n<p>\u8fd9\u91cc\u6ce8\u610f \u8fd9\u5757\u90fd\u662f\u58f0\u660e\u5b9a\u4e49\u5206\u79bb\u7684\u00a0 \u7f3a\u7701\u503c\u5728\u58f0\u660e\u5904\u5199 \u5b9a\u4e49\u5904\u4e0d\u5199<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"129\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/08\/20250815141028-689f3fd46f257.png\" width=\"454\" \/><\/p>\n<p>\u00a0find \u5b9e\u73b0\u67e5\u627e \u5b57\u7b26 \u548c\u67e5\u627e\u5b50\u4e32\u7684\u529f\u80fd\u00a0 substr\u5b9e\u73b0\u8fd4\u56destring\u7c7b\u578b\u7684\u5b50\u4e32<\/p>\n<h3>find \u5b57\u7b26<\/h3>\n<p>\u5148\u65ad\u8a00\u8ba9pos\u5408\u6cd5 \u7136\u540e\u76f4\u63a5\u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u904d\u5386 \u627e\u5230\u5c31\u8fd4\u56depos\u4f4d\u7f6e \u6ca1\u6709\u627e\u5230\u8fd4\u56denpos<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"207\" src=\"2025-08-155fo2h2pasnu.png\" width=\"430\" \/><\/p>\n<h3>find \u5b50\u4e32<\/h3>\n<p>\u540c\u6837\u5148\u65ad\u8a00 \u4e4b\u540e\u7528strstr\u51fd\u6570\u6765\u5224\u65ad\u662f\u4e0d\u662f\u5b50\u4e32\u00a0 \u662f\u4f1a\u8fd4\u56de\u4f4d\u7f6e\u7684\u6307\u9488 \u4e0d\u662f\u8fd4\u56denullpre\u00a0 \u8fd9\u91cc\u627e\u5230\u4e86\u8fd4\u56de\u65f6\u5019\u8fd4\u56de\u7684\u662fff-_str\u00a0 \u00a0\u8fd9\u6d89\u53ca\u5230\u6570\u7ec4\u6307\u9488\u7684\u77e5\u8bc6 -str\u5c31\u662fthis\u6307\u5411string\u7c7b\u7684\u6210\u5458\u53d8\u91cf_str \u8fd9\u662f\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\u00a0 _str\u662f\u9996\u5143\u7d20\u7684\u5730\u5740\u00a0 _str&#043;\u52a0\u5c31\u662f\u7b2c\u51e0\u4e2a\u5143\u7d20\u7684\u5730\u5740\u00a0 \u90a3\u8fd9\u4e2a\u5730\u5740\u51cf\u53bb\u9996\u5143\u7d20\u7684\u5730\u5740\u5c31\u662f\u4e0b\u6807<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"243\" src=\"2025-08-15nx0050jhgh5.png\" width=\"860\" \/><\/p>\n<h3>substr\u8fd4\u56destring\u7c7b\u578b\u5b50\u4e32<\/h3>\n<p>len\u5927\u4e8e\u5269\u4f59\u4e2a\u6570\u7684\u8bdd\u5148\u66f4\u65b0len<\/p>\n<p>\u4e4b\u540e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684ss \u9884\u7559len\u4e2a\u7a7a\u95f4 \u7136\u540e\u52a0\u4e0a\u62f7\u8d1d\u7684\u5185\u5bb9\u00a0 \u6700\u540e\u52a0\u4e2a\\\\0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"303\" src=\"2025-08-15qxpuaf0kpf0.png\" width=\"619\" \/><\/p>\n<h2>\u8fd0\u7b97\u7b26\u91cd\u8f7d<\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"222\" src=\"2025-08-15wbzl42sfzrx.png\" width=\"319\" \/><\/p>\n<p>\u5148\u5b9e\u73b0&lt;\u548c&#061;&#061; \u5b9e\u73b0\u7528\u5230\u7684\u662fstrcmp\u51fd\u6570 \u7b2c\u4e00\u4e2a\u5c0f\u4e8e\u7b2c\u4e8c\u4e2a\u8fd4\u56de\u8d1f\u503c \u7b49\u4e8e\u4f1a\u8fd4\u56de0 \u5927\u4e8e\u4f1a\u8fd4\u56de\u6b63\u6570<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"276\" src=\"2025-08-1532it0c3hm11.png\" width=\"777\" \/><\/p>\n<p>\u5269\u4e0b\u7684\u51e0\u4e2a\u548c\u65e5\u671f\u7c7b\u5b9e\u73b0\u90a3\u91cc\u7684\u4e00\u6837 \u53ea\u9700\u8981\u590d\u7528&lt;\u548c&#061;&#061;\u5c31\u53ef\u4ee5\u4e86<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"340\" src=\"2025-08-153ojtkuuvjnj.png\" width=\"389\" \/><\/p>\n<h3>\u6d41\u8fd0\u7b97\u7b26\u91cd\u8f7d<\/h3>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"56\" src=\"2025-08-15h4spkxderzt.png\" width=\"521\" \/><\/p>\n<p>\u5bf9\u4e8e\u8f93\u51fa\u6765\u8bf4 \u5728\u65e5\u671f\u7c7b\u90a3\u91cc\u4f7f\u7528\u7684\u65b9\u5f0f\u662f\u5c06\u5176\u5b9a\u4e49\u4e3a\u53cb\u5143\u51fd\u6570 \u8fd9\u91cc\u91c7\u7528\u8303\u56f4for\u7684\u65b9\u5f0f<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"166\" src=\"2025-08-15fhn1pm2eytx.png\" width=\"545\" \/><\/p>\n<p>\u8f93\u5165<\/p>\n<p>\u5728\u5f00\u59cb\u8bfb\u53d6\u524d\u6211\u4eec\u5148\u628a\u539f\u6765s\u4e2d\u7684\u5185\u5bb9\u7ed9\u6e05\u7406\u6389<\/p>\n<p>\u8f93\u5165\u5b58\u5728\u4e00\u4e9b\u95ee\u9898 cin\u8f93\u5165\u65f6\u5019\u9047\u5230\u7a7a\u683c\u5c31\u4f1a\u505c\u6b62\u8bfb\u53d6 \u6240\u4ee5\u8fd9\u91cc\u7528\u5230\u4e86cin\u91cc\u9762\u7684get get\u53ef\u4ee5\u8bfb\u53d6\u7a7a\u683c\u00a0<\/p>\n<p>\u7136\u540e\u8fd9\u91cc\u505a\u4e86\u4e00\u4e9b\u4f18\u5316\u00a0<\/p>\n<p>\u5f53\u8981\u8bfb\u53d6\u7684\u6570\u636e\u975e\u5e38\u591a\u7684\u65f6\u5019\u5c31\u4f1a\u9891\u7e41\u5730\u6269\u5bb9\u00a0 \u00a0\u8fd9\u91cc\u6211\u4eec\u76f8\u5f53\u4e8e\u7528\u6570\u7ec4\u7684\u65b9\u5f0f\u6765\u505a\u4e86\u4e00\u4e2a\u7f13\u51b2 \u5728\u6570\u636e\u8fdbs\u4e4b\u524d\u5148\u628a\u6570\u636e\u8bfb\u8fdb\u6570\u7ec4\u91cc\u9762 \u6bcf\u5f53\u8bfb\u7684\u6570\u636e\u591f\u4e86200\u518d\u5f80s\u91cc\u9762\u653e\u00a0 \u76f4\u5230\u6570\u636e\u4e0d\u591f200\u6570\u7ec4\u540e\u9762\u653e\u4e2a\\\\0\u518d\u7ed9s\u00a0<\/p>\n<p>\u5982\u679c\u6ca1\u6709\u8fd9\u4e2a\u4f18\u5316 \u521a\u5f00\u59cb\u7684\u7a7a\u95f4\u5c31\u4f1a\u9891\u7e41\u6269\u5bb9 \u4e00\u4e2a\u4e00\u4e2a\u6570\u636e\u6765\u770b\u00a0 \u6269\u5bb9\u60c5\u51b5\u5c31\u4f1a\u662f\u00a0 4 8 16 32 64 128 \u8fd9\u6837\u521a\u5f00\u59cb\u7a7a\u95f4\u5c0f\u5c31\u4f1a\u9891\u7e41\u5730\u6269\u5bb9\u00a0 \u6709\u4e2a\u8fd9\u4e2a\u4f18\u5316\u540e \u521a\u5f00\u59cb\u7a7a\u95f4\u662f0 \u6570\u7ec4\u591f\u4e86200\u4e4b\u540e\u7ed9s \u8df3\u5230&#043;&#061;\u51fd\u6570 \u8bc6\u522b\u5230200\u5b57\u7b26 \u76f4\u63a5\u9884\u7559200\u7a7a\u95f4 \u5c31\u5927\u5927\u51cf\u5c11\u4e86\u6269\u5bb9\u7684\u6b21\u6570\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" alt=\"\" height=\"434\" src=\"2025-08-15bnoggwwhvxo.png\" width=\"385\" 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