{"id":79698,"date":"2026-03-02T20:07:22","date_gmt":"2026-03-02T12:07:22","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/79698.html"},"modified":"2026-03-02T20:07:22","modified_gmt":"2026-03-02T12:07:22","slug":"c-string-%e5%85%a8%e9%9d%a2%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/79698.html","title":{"rendered":"C++ string \u5168\u9762\u6307\u5357"},"content":{"rendered":"

\u4e00\u3001\u6a21\u677f<\/h3>\n

1. \u51fd\u6570\u6a21\u677f<\/h4>\n

\u4ec0\u4e48\u662f\u6a21\u677f\u5462？\u6a21\u677f\u5c31\u662f\u4e00\u4e2a\u6a21\u5177，\u53ea\u9700\u8981\u5f80\u8fd9\u4e2a\u6a21\u5177\u91cc\u5012\u5165\u4e0d\u540c\u7684\u6750\u6599，\u5c31\u53ef\u4ee5\u83b7\u5f97\u4e0d\u540c\u6750\u6599\u7684\u94f8\u4ef6\u3002<\/p>\n

\u5982\u679c\u6211\u4eec\u8981\u5b9e\u73b0\u4e00\u4e2a\u4ea4\u6362\u51fd\u6570\u5462？\u8fd9\u662f\u5f88\u5bb9\u6613\u7684\u4e8b\u60c5\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u4f46\u662f\u8fd9\u79cd\u4ea4\u6362\u51fd\u6570\u53ea\u80fd\u5b9e\u73b0\u6574\u578b\u4e4b\u95f4\u7684\u4ea4\u6362，\u5982\u679c\u6211\u60f3\u8fdb\u884c\u6d6e\u70b9\u6570\u4ea4\u6362\u5462，\u5b57\u7b26\u578b\u4ea4\u6362\u5462？\u662f\u4e0d\u662f\u5c31\u4e0d\u53ef\u4ee5\u4e86\u3002<\/p>\n

\u867d\u7136\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u51fd\u6570\u91cd\u8f7d\u5b9e\u73b0\u4e0d\u540c\u7684\u4ea4\u6362\u51fd\u6570，\u4f46\u662f\u8fd9\u6837\u505a\u592a\u6d6a\u8d39\u65f6\u95f4\u4e86，\u6ca1\u6709\u610f\u4e49\u3002\u6bd5\u7adf\u53ea\u662f\u6539\u53d8\u4e86\u4ea4\u6362\u51fd\u6570\u53c2\u6570\u7684\u7c7b\u578b，\u4ee3\u7801\u4e0d\u9700\u8981\u53d8\u5316\u3002\u6240\u4ee5，\u8fd9\u79cd\u65b9\u6cd5\u662f\u6709\u7f3a\u9677\u7684\u3002<\/p>\n

1.\u4ee3\u7801\u590d\u7528\u7387\u4f4e\u3002<\/p>\n

2.\u53ef\u7ef4\u62a4\u6027\u5dee\u3002<\/p>\n

\u6240\u4ee5，\u6709\u4e86\u51fd\u6570\u6a21\u677f，\u8fd9\u662f\u5b9e\u73b0\u6cdb\u578b\u7f16\u7a0b\u7684\u57fa\u7840\u3002<\/p>\n

\u6240\u8c13\u6cdb\u578b\u7f16\u7a0b\u5c31\u662f\u7f16\u5199\u4e0e\u7c7b\u578b\u65e0\u5173\u7684\u901a\u7528\u4ee3\u7801，\u662f\u4ee3\u7801\u590d\u7528\u7684\u4e00\u79cd\u624b\u6bb5\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

template<typename T>\u5c31\u662f\u5b9a\u4e49\u4e86\u4e00\u4e2a\u6a21\u677f，\u901a\u8fc7\u4e00\u4efd\u4ee3\u7801\u5c31\u53ef\u4ee5\u5b9e\u73b0\u591a\u4e2a\u8981\u6c42\u3002<\/p>\n

\u8fd9\u91cc\u7684typename\u4e5f\u53ef\u4ee5\u6362\u6210class，\u8fd9\u4e24\u4e2a\u7684\u533a\u522b\u4f1a\u5728\u540e\u9762\u8bb2\u89e3\u3002<\/p>\n

\u8fd9\u4e2a\u5c31\u53eb\u505a\u51fd\u6570\u6a21\u677f，\u51fd\u6570\u6a21\u677f\u4ee3\u8868\u4e86\u4e00\u4e2a\u51fd\u6570\u5bb6\u65cf，\u8be5\u51fd\u6570\u6a21\u677f\u4e0e\u7c7b\u578b\u65e0\u5173，\u5728\u4f7f\u7528\u65f6\u88ab\u53c2\u6570\u5316，\u6839\u636e\u5b9e\u53c2\u7c7b\u578b\u4ea7\u751f\u51fd\u6570\u7684\u7279\u5b9a\u7c7b\u578b\u7248\u672c\u3002<\/p>\n

\u51fd\u6570\u6a21\u677f\u7684\u683c\u5f0f：template<typename T1, typename T2, …, typename Tn>\u3002<\/p>\n

2. \u51fd\u6570\u6a21\u677f\u7684\u539f\u7406<\/h4>\n

\u51fd\u6570\u6a21\u677f\u662f\u4e00\u4e2a\u84dd\u56fe，\u5b83\u672c\u8eab\u5e76\u4e0d\u662f\u51fd\u6570，\u662f\u7f16\u8bd1\u5668\u7528\u4f7f\u7528\u65b9\u5f0f\u4ea7\u751f\u7279\u5b9a\u5177\u4f53\u7c7b\u578b\u51fd\u6570\u7684\u6a21\u5177\u3002\u6240\u4ee5，\u5176\u5b9e\u6a21\u677f\u5c31\u662f\u5c06\u672c\u6765\u5e94\u8be5\u6211\u4eec\u91cd\u590d\u6027\u505a\u7684\u5de5\u4f5c\u4ea4\u7ed9\u4e86\u7f16\u8bd1\u5668\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u5728\u7f16\u8bd1\u5668\u7f16\u8bd1\u9636\u6bb5，\u5bf9\u4e8e\u6a21\u677f\u51fd\u6570\u7684\u4f7f\u7528，\u7f16\u8bd1\u5668\u9700\u8981\u6839\u636e\u4f20\u5165\u7684\u5b9e\u53c2\u7c7b\u578b\u6765\u63a8\u6f14\u751f\u6210\u5bf9\u5e94\u7c7b\u578b\u7684\u51fd\u6570\u4ee5\u4f9b\u8c03\u7528\u3002<\/p>\n

3. \u51fd\u6570\u6a21\u677f\u7684\u5b9e\u4f8b\u5316<\/h4>\n

\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u53c2\u6570\u4f7f\u7528\u51fd\u6570\u6a21\u677f\u65f6，\u79f0\u4e3a\u51fd\u6570\u6a21\u677f\u7684\u5b9e\u4f8b\u5316\u3002<\/p>\n

\u6a21\u677f\u53c2\u6570\u5b9e\u4f8b\u5316\u5206\u4e3a：\u9690\u5f0f\u5b9e\u4f8b\u5316\u548c\u663e\u793a\u5b9e\u4f8b\u5316\u3002<\/p>\n

. \u9690\u5f0f\u5b9e\u4f8b\u5316：\u8ba9\u7f16\u8bd1\u5668\u6839\u636e\u5b9e\u53c2\u63a8\u6f14\u6a21\u677f\u53c2\u6570\u7684\u5b9e\u9645\u7c7b\u578b\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

. \u663e\u793a\u5b9e\u4f8b\u5316：\u5728\u51fd\u6570\u540d\u540e\u7684<>\u4e2d\u6307\u5b9a\u6a21\u677f\u53c2\u6570\u7684\u5b9e\u9645\u7c7b\u578b\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

4. \u6a21\u677f\u53c2\u6570\u7684\u5339\u914d\u539f\u5219<\/h4>\n

. \u4e00\u4e2a\u975e\u6a21\u677f\u51fd\u6570\u53ef\u4ee5\u548c\u4e00\u4e2a\u540c\u540d\u7684\u51fd\u6570\u6a21\u677f\u540c\u65f6\u5b58\u5728，\u800c\u4e14\u8be5\u51fd\u6570\u6a21\u677f\u8fd8\u53ef\u4ee5\u5b9e\u4f8b\u5316\u4e3a\u8fd9\u4e2a\u975e\u6a21\u677f\u51fd\u6570\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

. \u5bf9\u4e8e\u975e\u6a21\u677f\u51fd\u6570\u548c\u540c\u540d\u51fd\u6570\u6a21\u677f，\u5982\u679c\u5176\u5b83\u6761\u4ef6\u76f8\u540c，\u5728\u8c03\u7528\u65f6\u4f1a\u4f18\u5148\u8c03\u7528\u975e\u6a21\u677f\u51fd\u6570\u800c\u4e0d\u4f1a\u4ece\u8be5\u6a21\u677f\u4ea7\u751f\u51fa\u4e00\u4e2a\u5b9e\u4f8b\u3002\u5982\u679c\u6a21\u677f\u53ef\u4ee5\u4ea7\u751f\u51fa\u4e00\u4e2a\u66f4\u597d\u5339\u914d\u7684\u51fd\u6570，\u90a3\u4e48\u5c06\u9009\u62e9\u6a21\u677f\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

. \u6a21\u677f\u51fd\u6570\u4e0d\u5141\u8bb8\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362，\u4f46\u666e\u901a\u51fd\u6570\u53ef\u4ee5\u8fdb\u884c\u81ea\u52a8\u7c7b\u578b\u8f6c\u6362\u3002<\/p>\n

5. \u7c7b\u6a21\u677f<\/h4>\n

. \u7c7b\u6a21\u677f\u7684\u5b9a\u4e49\u683c\u5f0f<\/p>\n

template<\/span><<\/span>class<\/span> T1<\/span>,<\/span> class<\/span> T2<\/span>,<\/span>.<\/span>.<\/span>.<\/span>,<\/span> class<\/span> Tn<\/span>><\/span>
\nclass<\/span> \u7c7b\u6a21\u677f\u540d
\n{<\/span>
\n\/\/\u7c7b\u5185\u6210\u5458\u5b9a\u4e49<\/span>
\n}<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

. \u7c7b\u6a21\u677f\u7684\u5b9e\u4f8b\u5316<\/p>\n

\u7c7b\u6a21\u677f\u5b9e\u4f8b\u5316\u4e0e\u51fd\u6570\u6a21\u677f\u5b9e\u4f8b\u5316\u4e0d\u540c，\u7c7b\u6a21\u677f\u5b9e\u4f8b\u5316\u9700\u8981\u5728\u7c7b\u6a21\u677f\u540d\u5b57\u540e\u8ddf<>，\u5c06\u5b9e\u4f8b\u5316\u7684\u7c7b\u578b\u653e\u5728<>\u4e2d\u5373\u53ef，\u7c7b\u6a21\u677f\u540d\u5b57\u4e0d\u662f\u771f\u6b63\u7684\u7c7b，\u800c\u5b9e\u4f8b\u5316\u7684\u7ed3\u679c\u624d\u662f\u771f\u6b63\u7684\u7c7b\u3002<\/p>\n

\/\/ Stack\u662f\u7c7b\u540d，Stack<int>\u624d\u662f\u7c7b\u578b<\/span>
\nStack<<\/span>int<\/span>><\/span> st1;<\/span> \/\/ int<\/span>
\nStack<<\/span>double<\/span>><\/span> st2;<\/span> \/\/ double<\/span><\/p>\n

\u4e8c\u3001STL\u7b80\u4ecb<\/h3>\n

\u4ec0\u4e48\u662fSTL\u5462？<\/p>\n

STL\u662fC++\u6807\u51c6\u5e93\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206，\u4e0d\u4ec5\u662f\u4e00\u4e2a\u53ef\u590d\u7528\u7684\u7ec4\u4ef6\u5e93，\u800c\u4e14\u662f\u4e00\u4e2a\u5305\u7f57\u6570\u636e\u7ed3\u6784\u4e0e\u7b97\u6cd5\u7684\u8f6f\u4ef6\u6846\u67b6\u3002<\/p>\n

\u90a3\u4e48，\u6211\u4eec\u9700\u8981\u5b66\u4e60STL\u7684\u54ea\u4e9b\u90e8\u5206\u5462？<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u4e3b\u8981\u5b66\u4e60\u4e94\u4e2a\u90e8\u5206，\u7a7a\u95f4\u914d\u7f6e\u5668\u76f4\u63a5\u4f7f\u7528\u5373\u53ef\u3002<\/p>\n

\u4e09\u3001String<\/h3>\n

\u5b66\u4e60string\u4ece\u4e24\u65b9\u9762\u53bb\u5b66\u4e60，\u4e00\u4e2a\u662f\u4e86\u89e3string\u7c7b\u7684\u63a5\u53e3，\u53e6\u4e00\u4e2a\u4fbf\u662f\u6a21\u62df\u5b9e\u73b0string\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

string\u662f\u88ab typedef \u7684，\u771f\u540d\u53eb\u505abasic_string<char>，\u662f\u7528\u6765\u5b58\u50a8\u5b57\u7b26\u7684\u3002<\/p>\n

1. constructor<\/h4>\n

\/\/\u6784\u9020\u51fd\u6570，\u6700\u5e38\u7528\u7684\u51e0\u4e2a<\/span>
\ndefault<\/span>(<\/span>1<\/span>)<\/span> string<\/span>(<\/span>)<\/span>;<\/span>\/\/\u65e0\u53c2\u6784\u9020<\/span>
\ncopy<\/span>(<\/span>2<\/span>)<\/span> string<\/span> (<\/span>const<\/span> string&<\/span> str)<\/span>;<\/span>\/\/\u62f7\u8d1d\u6784\u9020<\/span>
\nfrom c–<\/span>string<\/span>(<\/span>4<\/span>)<\/span> string<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s)<\/span>;<\/span>\/\/\u5b57\u7b26\u4e32\u6784\u9020<\/span>
\n\/\/\u4e0d\u592a\u5e38\u7528\u7684<\/span>
\n\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb，\u62f7\u8d1dstr\u5b57\u7b26\u4e32\u7684\u540elen\u4e2a\u5b57\u7b26，\u5982\u679cstr\u5b57\u7b26\u4e32<\/span>
\n\/\/\u592a\u77ed\u6216\u8005len\u4e3anpos，\u90a3\u5c31\u4ecepos\u4f4d\u7f6e\u62f7\u8d1d\u5230str\u5b57\u7b26\u4e32\u672b\u5c3e<\/span>
\nsubstring<\/span>(<\/span>3<\/span>)<\/span> string<\/span>(<\/span>const<\/span> string&<\/span> str,<\/span> size_t pos,<\/span> size_t len =<\/span> npos)<\/span>;<\/span>
\n\/\/\u62f7\u8d1ds\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u7684\u524dn\u4e2a\u5b57\u7b26<\/span>
\nfrom sequence<\/span>(<\/span>5<\/span>)<\/span> string<\/span>(<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t n)<\/span>;<\/span>
\n\/\/\u7528n\u4e2a\u8fde\u7eed\u7684\u5b57\u7b26c\u7684\u62f7\u8d1d\u586b\u5145string<\/span>
\nfill<\/span>(<\/span>6<\/span>)<\/span> string<\/span>(<\/span>size_t n,<\/span> char<\/span> c)<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\/\/\u8d4b\u503c<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> operator<\/span>=<\/span> (<\/span>const<\/span> string&<\/span> str)<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

2. Iterators<\/h4>\n

\/\/\u5982\u679cstring\u5bf9\u8c61\u662f\u4e00\u4e2aconst\u7c7b\u578b\u7684，\u51fd\u6570\u8fd4\u56deconst_iterator，\u5426\u5219，\u8fd4\u56deiterator<\/span>
\n\/\/\u666e\u901a\u8fed\u4ee3\u5668<\/span>
\niterator begin<\/span>(<\/span>)<\/span>;<\/span>\/\/\u6307\u5411\u5b57\u7b26\u4e32\u7684\u5f00\u59cb<\/span>
\niterator end<\/span>(<\/span>)<\/span>;<\/span>\/\/\u6307\u5411\u5b57\u7b26\u4e32\u7684\u672b\u5c3e（\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e）<\/span>
\n\/\/const\u8fed\u4ee3\u5668<\/span>
\nconst_iterator begin<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\nconst_iterator end<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u53cd\u5411\u8fed\u4ee3\u5668<\/span>
\n\/\/\u53cd\u5411\u8fed\u4ee3\u5668\u6307\u5411string\u7684\u53cd\u5411\u5f00\u59cb\u4f4d\u7f6e（\u4e5f\u5c31\u662fstring\u7684\u672b\u5c3e\u6700\u540e\u4e00\u4e2a\u5b57\u7b26）<\/span>
\nreverse_iterator rbegin<\/span>(<\/span>)<\/span>;<\/span>
\nconst_reverse_iterator rbegin<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u6307\u5411string\u7684\u672b\u5c3e\u7684\u53cd\u5411（\u4e5f\u5c31\u662fstring\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u524d\u4e00\u4e2a\u4f4d\u7f6e）<\/span>
\nreverse_iterator rend<\/span>(<\/span>)<\/span>;<\/span>
\nconst_reverse_iterator rend<\/span>(<\/span>)<\/span> const<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u6ce8：\u8fed\u4ee3\u5668\u53ef\u4ee5\u7406\u89e3\u6210\u50cf\u6307\u9488\u4e00\u6837，\u4f46\u662f\u8fed\u4ee3\u5668\u4e0d\u662f\u6307\u9488\u3002<\/p>\n

3. Capacity<\/h4>\n

\/\/size\u548clength\u4e24\u4e2a\u51fd\u6570\u7684\u529f\u80fd\u662f\u4e00\u81f4\u7684<\/span>
\n\/\/\u5b57\u7b26\u4e32\u7684\u5b57\u8282\u6570<\/span>
\nsize_t size<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\nsize_t length<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u5b57\u7b26\u4e32\u7684\u5bb9\u91cf<\/span>
\nsize_t capacity<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u6e05\u7a7a\u5b57\u7b26\u4e32<\/span>
\nvoid<\/span> clear<\/span>(<\/span>)<\/span>;<\/span>
\n\/\/\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a，length\u4e3a0\u8fd4\u56detrue，\u5426\u5219，\u8fd4\u56defalse<\/span>
\nbool<\/span> empty<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/n\u4ee3\u8868\u65b0\u7684\u5b57\u7b26\u4e32\u7684\u957f\u5ea6，c\u662f\u7528\u6765\u586b\u5145\u5b57\u7b26\u4e32\u4e2d\u65b0\u7684\u5b57\u7b26\u7a7a\u95f4\u7684\u5b57\u7b26<\/span>
\n\/\/\u5982\u679cn\u5c0f\u4e8e\u5f53\u524d\u5b57\u7b26\u4e32\u7684\u957f\u5ea6，\u5b57\u7b26\u4e32\u4f1a\u7f29\u77ed\u81f3\u524dn\u4e2a\u5b57\u7b26，\u5220\u9664\u7b2c<\/span>
\n\/\/n\u4e2a\u5b57\u7b26\u4e4b\u540e\u7684\u6240\u6709\u5b57\u7b26<\/span>
\n\/\/\u5982\u679cn\u5927\u4e8e\u5f53\u524d\u5b57\u7b26\u4e32\u7684\u957f\u5ea6，\u5728\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u63d2\u5165\u5b57\u7b26\u5230n\u4e2a<\/span>
\n\/\/（c\u662f\u4e00\u4e2a\u5177\u4f53\u7684\u5b57\u7b26，\u5c31\u7528c\u6765\u521d\u59cb\u5316，\u5426\u5219\u5c31\u7528\u7a7a\u5b57\u7b26\u521d\u59cb\u5316）<\/span>
\nvoid<\/span> resize<\/span> (<\/span>size_t n)<\/span>;<\/span>
\nvoid<\/span> resize<\/span> (<\/span>size_t n,<\/span> char<\/span> c)<\/span>;<\/span>
\n\/\/\u8bf7\u6c42\u8c03\u6574\u5b57\u7b26\u4e32\u7684\u5bb9\u91cf，\u9002\u5e94\u5c06\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u66f4\u6539\u4e3a\u6700\u591an\u4e2a\u5b57\u7b26\u7684\u9700\u6c42<\/span>
\n\/\/\u5982\u679cn > str.capacity，\u5bb9\u5668\u7684\u5bb9\u91cf\u4f1a\u589e\u52a0\u5230n\u4e2a\u5b57\u7b26（capacity >= n）<\/span>
\n\/\/\u5176\u5b83\u60c5\u51b5，\u7f29\u5c0f\u5b57\u7b26\u4e32\u7684\u5bb9\u91cf\u662f\u4e00\u4e2a\u975e\u5f3a\u5236\u6027\u7684\u8bf7\u6c42<\/span>
\n\/\/\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4f1a\u5f71\u54cd\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u548c\u5185\u5bb9，\u4e5f\u5c31\u662f\u8bf4\u5373\u4f7f\u7f29\u5bb9\u4e5f\u4e0d\u4f1a<\/span>
\n\/\/\u6bd4\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u5c0f<\/span>
\nvoid<\/span> reserve<\/span> (<\/span>size_t n =<\/span> 0<\/span>)<\/span>;<\/span>
\n\/\/\u51cf\u5c11\u5b57\u7b26\u4e32\u7684\u5bb9\u91cf\u53bb\u9002\u5e94\u5b83\u7684size<\/span>
\n\/\/\u4e0d\u5f71\u54cd\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u548c\u5185\u5bb9<\/span>
\nvoid<\/span> shrink_to_fit<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

shrink_to_fit\u901a\u5e38\u662f\u5f02\u5730\u7f29\u5bb9，\u56e0\u4e3a\u65e0\u6cd5\u4ece\u5185\u5b58\u5757\u7684\u4e2d\u95f4\u91ca\u653e\u4e00\u90e8\u5206\u5185\u5b58\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"
\n\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u8fd9\u662f\u5728vs\u4e0a\u8fd0\u884c\u7684\u7ed3\u679c，\u662f\u6ca1\u6709\u7f29\u5bb9\u7684，\u90a3\u4e48，\u770b\u4e00\u4e0bg++\u7f16\u8bd1\u5668\u4f1a\u4e0d\u4f1a\u8fdb\u884c\u7f29\u5bb9\u5462？<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

g++\u4e0b\u4e5f\u662f\u6ca1\u6709\u7f29\u5bb9\u7684\u3002\u662f\u5426\u7f29\u5bb9，\u53d6\u51b3\u4e8e\u5e73\u53f0\u3002<\/p>\n

4. Element access<\/h4>\n

\/\/\u8fd4\u56de\u5728\u5b57\u7b26\u4e32\u4e2dpos\u4f4d\u7f6e\u7684\u5b57\u7b26\u7684\u5f15\u7528<\/span>
\nchar<\/span>&<\/span> operator<\/span>[<\/span>]<\/span> (<\/span>size_t pos)<\/span>;<\/span>
\nconst<\/span> char<\/span>&<\/span> operator<\/span>[<\/span>]<\/span> (<\/span>size_t pos)<\/span> const<\/span>;<\/span>
\n\/\/\u4e0e[]\u7684\u529f\u80fd\u4e00\u6837，\u8fd9\u4e5f\u662f\u4e3a\u4ec0\u4e48string\u88ab\u5410\u69fd\u7684\u539f\u56e0，\u8bbe\u8ba1\u4e86\u592a<\/span>
\n\/\/\u591a\u7684\u51fd\u6570，\u6709\u4e9b\u51fd\u6570\u529f\u80fd\u662f\u4e00\u6837\u7684，\u91cd\u70b9\u638c\u63e1[]\u7684\u4f7f\u7528<\/span>
\nchar<\/span>&<\/span> at<\/span> (<\/span>size_t pos)<\/span>;<\/span>
\nconst<\/span> char<\/span>&<\/span> at<\/span> (<\/span>size_t pos)<\/span> const<\/span>;<\/span>
\n\/\/\u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32\u4e2d\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u5f15\u7528<\/span>
\nchar<\/span>&<\/span> back<\/span>(<\/span>)<\/span>;<\/span>
\nconst<\/span> char<\/span>&<\/span> back<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32\u4e2d\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u5f15\u7528<\/span>
\nchar<\/span>&<\/span> front<\/span>(<\/span>)<\/span>;<\/span>
\nconst<\/span> char<\/span>&<\/span> front<\/span>(<\/span>)<\/span> const<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

5. Modifiers<\/h4>\n

\/\/\u5728\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u8ffd\u52a0\u53e6\u4e00\u4e2astd::string str\u5bf9\u8c61<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> operator<\/span>+=<\/span> (<\/span>const<\/span> string&<\/span> str)<\/span>;<\/span>
\n\/\/\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u8ffd\u52a0C\u98ce\u683c\u7684s\u5b57\u7b26\u4e32<\/span>
\nc–<\/span>string<\/span>(<\/span>2<\/span>)<\/span> string&<\/span> operator<\/span>+=<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s)<\/span>;<\/span>
\n\/\/\u5728\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u8ffd\u52a0\u5355\u4e2a\u5b57\u7b26<\/span>
\ncharacter<\/span>(<\/span>3<\/span>)<\/span> string&<\/span> operator<\/span>+=<\/span> (<\/span>char<\/span> c)<\/span>;<\/span><\/p>\n

\/\/\u8ffd\u52a0str\u7684\u62f7\u8d1d<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> append<\/span> (<\/span>const<\/span> string&<\/span> str)<\/span>;<\/span>
\n\/\/\u4ecestr\u7684subpos\u4f4d\u7f6e\u5f00\u59cb，\u62ff\u53d6sublen\u4e2a\u5b57\u7b26，\u8ffd\u52a0\u5230string<\/span>
\n\/\/\u7684\u5bf9\u8c61\u4e2d，\u5982\u679cstr\u592a\u77ed\u6216\u8005sublen\u7b49\u4e8enpos，\u90a3\u5c31\u53d6\u5230str\u7684<\/span>
\n\/\/\u672b\u5c3e<\/span>
\nsubstring<\/span>(<\/span>2<\/span>)<\/span> string&<\/span> append<\/span> (<\/span>const<\/span> string&<\/span> str,<\/span> size_t subpos,<\/span> size_t sublen)<\/span>;<\/span>
\n\/\/s\u6307\u5411\u7684\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u5c3e\u7684\u5b57\u7b26\u5e8f\u5217，\u8ffd\u52a0\u5230string\u5bf9\u8c61\u4e2d<\/span>
\nc–<\/span>string<\/span>(<\/span>3<\/span>)<\/span> string&<\/span> append<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s)<\/span>;<\/span>
\n\/\/\u53d6s\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u524dn\u4e2a\u5b57\u7b26，\u8ffd\u52a0\u5230string\u5bf9\u8c61\u4e2d<\/span>
\nbuffer<\/span>(<\/span>4<\/span>)<\/span> string&<\/span> append<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t n)<\/span>;<\/span>
\n\/\/n\u4e2a\u5b57\u7b26c\u7684\u62f7\u8d1d，\u8ffd\u52a0\u5230string\u5bf9\u8c61\u4e2d<\/span>
\nfill<\/span>(<\/span>5<\/span>)<\/span> string&<\/span> append<\/span> (<\/span>size_t n,<\/span> char<\/span> c)<\/span>;<\/span><\/p>\n

\/\/\u5728string\u5bf9\u8c61\u7684\u672b\u5c3e\u6dfb\u52a0\u5b57\u7b26c，string\u5bf9\u8c61\u7684\u957f\u5ea6\u589e\u52a01<\/span>
\nvoid<\/span> push_back<\/span> (<\/span>char<\/span> c)<\/span>;<\/span>
\n\/\/\u5220\u9664string\u5bf9\u8c61\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26，string\u5bf9\u8c61\u7684\u957f\u5ea6\u51cf1<\/span>
\nvoid<\/span> pop_back<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

\/\/\u5728pos\u4f4d\u7f6e\u63d2\u5165str\u7684\u62f7\u8d1d<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> insert<\/span> (<\/span>size_t pos,<\/span> const<\/span> string&<\/span> str)<\/span>;<\/span>
\n\/\/\u4ecestr\u4e2d\u7684subpos\u4f4d\u7f6e\u5f00\u59cb，\u53d6sublen\u4e2a\u5b57\u7b26，\u63d2\u5165\u5230string<\/span>
\n\/\/\u5bf9\u8c61\u4e2d，\u5982\u679cstr\u592a\u77ed\u6216\u8005sublen\u7b49\u4e8enpos，\u5c31\u4ecesubpos\u4f4d\u7f6e<\/span>
\n\/\/\u5f00\u59cb\u4e00\u76f4\u5230str\u5b57\u7b26\u4e32\u7684\u672b\u5c3e<\/span>
\nsubstring<\/span>(<\/span>2<\/span>)<\/span> string&<\/span> insert<\/span> (<\/span>size_t pos,<\/span> const<\/span> string&<\/span> str,<\/span> size_t subpos,<\/span> size_t sublen)<\/span>;<\/span>
\n\/\/s\u6307\u5411\u7684\u4ee5\u7a7a\u5b57\u7b26\u7ed3\u5c3e\u7684\u5b57\u7b26\u5e8f\u5217，\u63d2\u5165\u5230string\u5bf9\u8c61\u4e2d<\/span>
\nc–<\/span>string<\/span>(<\/span>3<\/span>)<\/span> string&<\/span> insert<\/span> (<\/span>size_t pos,<\/span> const<\/span> char<\/span>*<\/span> s)<\/span>;<\/span>
\n\/\/s\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u7684\u524dn\u4e2a\u5b57\u7b26\u7684\u62f7\u8d1d\u63d2\u5165\u5230string\u5bf9\u8c61\u4e2d<\/span>
\nbuffer<\/span>(<\/span>4<\/span>)<\/span> string&<\/span> insert<\/span> (<\/span>size_t pos,<\/span> const<\/span> char<\/span>*<\/span> s,<\/span> size_t n)<\/span>;<\/span>
\n\/\/\u63d2\u5165\u5b57\u7b26c\u7684n\u6b21\u62f7\u8d1d<\/span>
\nfill<\/span>(<\/span>5<\/span>)<\/span> string&<\/span> insert<\/span> (<\/span>size_t pos,<\/span> size_t n,<\/span> char<\/span> c)<\/span>;<\/span><\/p>\n

\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb，\u5220\u9664string\u7684len\u4e2a\u5b57\u7b26，\u5982\u679cstring\u592a\u77ed\u6216\u8005len\u4e3anpos，\u5c31\u5220\u5230string\u7684\u672b\u5c3e\u3002<\/span>
\n\/\/\u6ce8\u610f，\u8be5\u51fd\u6570\u9ed8\u8ba4\u5220\u9664string\u7684\u6240\u6709\u5b57\u7b26<\/span>
\nsequence<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> erase<\/span> (<\/span>size_t pos =<\/span> 0<\/span>,<\/span> size_t len =<\/span> npos)<\/span>;<\/span><\/p>\n

\/\/\u4ecestring\u5bf9\u8c61\u4e2d\u7684pos\u4f4d\u7f6e，\u7528str\u5b57\u7b26\u4e32\u66ff\u6362\u6389string\u5bf9\u8c61\u4e2d\u7684len\u4e2a\u5b57\u7b26<\/span>
\nstring&<\/span> replace<\/span>(<\/span>size_t pos,<\/span> size_t len,<\/span> const<\/span> string&<\/span> str)<\/span>;<\/span><\/p>\n

\/\/\u62f7\u8d1dstr\u5b57\u7b26\u4e32\u8d4b\u503c\u7ed9string\u5bf9\u8c61<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> string&<\/span> assign<\/span> (<\/span>const<\/span> string&<\/span> str)<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u6ce8：insert，erase，replace\u9700\u614e\u7528，\u56e0\u4e3astring\u7684\u5e95\u5c42\u662f\u6570\u7ec4，\u5728\u63d2\u5165，\u5220\u9664，\u6570\u636e\u65f6，\u90fd\u9700\u8981\u79fb\u52a8\u6570\u636e，\u8fd9\u4e5f\u5c31\u610f\u5473\u7740\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(N)，\u800c\u66ff\u6362\u6570\u636e，\u5982\u679c\u66ff\u6362\u7684\u5b57\u7b26\u4e32\u548c len \u662f\u76f8\u7b49\u7684，\u90a3\u8fd8\u662f\u5f88\u9ad8\u6548\u7684，\u4f46\u662f\u5982\u679c\u4e0d\u76f8\u7b49，\u4e5f\u9700\u8981\u79fb\u52a8\u6570\u636e，\u65f6\u95f4\u590d\u6742\u5ea6\u4e5f\u4e3aO(N)\u3002<\/p>\n

\/\/\u5f97\u5230\u4e00\u4e2aC\u98ce\u683c\u7684\u5b57\u7b26\u4e32<\/span>
\nconst<\/span> char<\/span>*<\/span> c_str<\/span>(<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u67e5\u627e\u4e00\u4e2astring\u5bf9\u8c61<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> size_t find<\/span> (<\/span>const<\/span> string&<\/span> str,<\/span> size_t pos =<\/span> 0<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u67e5\u627e\u4e00\u4e2a\u5b57\u7b26\u4e32<\/span>
\nc–<\/span>string<\/span>(<\/span>2<\/span>)<\/span> size_t find<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t pos =<\/span> 0<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u4ecepos\u4f4d\u7f6e\u67e5\u627es\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u7684\u524dn\u4e2a\u5b57\u7b26<\/span>
\nbuffer<\/span>(<\/span>3<\/span>)<\/span> size_t find<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t pos,<\/span> size_t n)<\/span> const<\/span>;<\/span>
\n\/\/\u4ecepos\u4f4d\u7f6e\u67e5\u627e\u5355\u4e2a\u5b57\u7b26<\/span>
\ncharacter<\/span>(<\/span>4<\/span>)<\/span> size_t find<\/span> (<\/span>char<\/span> c,<\/span> size_t pos =<\/span> 0<\/span>)<\/span> const<\/span>;<\/span>
\n\/\/\u53cd\u5411\u67e5\u627e，\u4e0efind\u7684\u529f\u80fd\u662f\u4e00\u6837\u7684，\u53ea\u4e0d\u8fc7\u4e00\u4e2a\u4ecestring\u7684\u5f00\u5934\u5904\u67e5\u627e，\u4e00\u4e2a\u4ecestring\u7684\u672b\u5c3e\u67e5\u627e<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> size_t rfind<\/span> (<\/span>const<\/span> string&<\/span> str,<\/span> size_t pos =<\/span> npos)<\/span> const<\/span>;<\/span>
\nc–<\/span>string<\/span>(<\/span>2<\/span>)<\/span> size_t rfind<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t pos =<\/span> npos)<\/span> const<\/span>;<\/span>
\nbuffer<\/span>(<\/span>3<\/span>)<\/span> size_t rfind<\/span> (<\/span>const<\/span> char<\/span>*<\/span> s,<\/span> size_t pos,<\/span> size_t n)<\/span> const<\/span>;<\/span>
\ncharacter<\/span>(<\/span>4<\/span>)<\/span> size_t rfind<\/span> (<\/span>char<\/span> c,<\/span> size_t pos =<\/span> npos)<\/span> const<\/span>;<\/span>
\n\/\/\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u7b2c\u4e00\u4e2a\u51fa\u73b0\u5728\u6307\u5b9a\u5b57\u7b26\u96c6\u5408\u4e2d\u7684\u5b57\u7b26<\/span>
\n\/\/\u6210\u529f\u8fd4\u56de\u7b2c\u4e00\u4e2a\u5339\u914d\u5b57\u7b26\u7684\u4f4d\u7f6e，\u5931\u8d25\u8fd4\u56denpos<\/span>
\nstring<\/span>(<\/span>1<\/span>)<\/span> size_t find_first_of<\/span> (<\/span>const<\/span> string&<\/span> str,<\/span> size_t pos =<\/span> 0<\/span>)<\/span> const<\/span>;<\/span><\/p>\n

\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u53d6len\u4e2a\u5b57\u7b26\u7ec4\u6210\u4e00\u4e2a\u5b50\u4e32，\u6784\u9020\u4e00\u4e2a\u65b0\u7684string\u5bf9\u8c61\u5e76\u8fd4\u56de（\u6216\u8005\u5230\u5b57\u7b26\u4e32\u7684\u672b\u5c3e，\u5982\u679clen\u5927\u4e8e\u4ecepos\u4f4d\u7f6e\u5f00\u59cb\u5269\u4f59\u5b57\u7b26\u7684\u957f\u5ea6）<\/span>
\nstring substr<\/span>(<\/span>size_t pos =<\/span> 0<\/span>,<\/span> size_t len =<\/span> npos)<\/span> const<\/span>;<\/span><\/p>\n

\/\/\u4ecepos\u4f4d\u7f6e\u5f00\u59cb，\u62f7\u8d1dstring\u5bf9\u8c61\u4e2d\u7684len\u4e2a\u5b57\u7b26，\u5b58\u50a8\u5728s\u6307\u5411\u7684\u5b57\u7b26\u6570\u7ec4\u91cc<\/span>
\nsize_t copy<\/span>(<\/span>char<\/span>*<\/span> s,<\/span> size_t len,<\/span> size_t pos =<\/span> 0<\/span>)<\/span> const<\/span>;<\/span><\/p>\n

npos\u662f\u4e00\u4e2a size_t \u7c7b\u578b，\u503c\u4e3a -1，\u5b9e\u9645\u503c\u662f\u4e00\u4e2a\u65e0\u7a77\u5927\u7684\u6570，\u56e0\u4e3a size_t \u662f\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u578b\u3002<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

6. Non-member function<\/h4>\n

\/\/\u83b7\u53d6\u4e00\u884c\u5b57\u7b26<\/span>
\n\/\/is\u8f93\u5165\u6d41\u5bf9\u8c61,str\u5b58\u50a8\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61,delim\u63d0\u53d6\u5b57\u7b26\u7684\u5206\u5272\u7b26<\/span>
\n(<\/span>1<\/span>)<\/span>istream&<\/span> getline<\/span> (<\/span>istream&<\/span> is,<\/span> string&<\/span> str,<\/span> char<\/span> delim)<\/span>;<\/span>
\n(<\/span>2<\/span>)<\/span>istream&<\/span> getline<\/span> (<\/span>istream&<\/span> is,<\/span> string&<\/span> str)<\/span>;<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u4eca\u5929\u7684\u6587\u7ae0\u5206\u4eab\u5230\u6b64\u7ed3\u675f，\u89c9\u5f97\u4e0d\u9519\u7684\u5c0f\u4f19\u4f34\u7ed9\u4e2a\u4e00\u952e\u4e09\u8fde\u5427\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e00\u3001\u6a21\u677f
\n1. \u51fd\u6570\u6a21\u677f
\n\u4ec0\u4e48\u662f\u6a21\u677f\u5462？\u6a21\u677f\u5c31\u662f\u4e00\u4e2a\u6a21\u5177，\u53ea\u9700\u8981\u5f80\u8fd9\u4e2a\u6a21\u5177\u91cc\u5012\u5165\u4e0d\u540c\u7684\u6750\u6599，\u5c31\u53ef\u4ee5\u83b7\u5f97\u4e0d\u540c\u6750\u6599\u7684\u94f8\u4ef6\u3002
\n\u5982\u679c\u6211\u4eec\u8981\u5b9e\u73b0\u4e00\u4e2a\u4ea4\u6362\u51fd\u6570\u5462？\u8fd9\u662f\u5f88\u5bb9\u6613\u7684\u4e8b\u60c5\u3002\u4f46\u662f\u8fd9\u79cd\u4ea4\u6362\u51fd\u6570\u53ea\u80fd\u5b9e\u73b0\u6574\u578b\u4e4b\u95f4\u7684\u4ea4\u6362，\u5982\u679c\u6211\u60f3\u8fdb\u884c\u6d6e\u70b9\u6570\u4ea4\u6362\u5462，\u5b57\u7b26\u578b\u4ea4\u6362\u5462？\u662f\u4e0d\u662f\u5c31\u4e0d\u53ef\u4ee5\u4e86\u3002
\n\u867d\u7136\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u51fd\u6570\u91cd\u8f7d\u5b9e\u73b0\u4e0d\u540c\u7684\u4ea4\u6362\u51fd\u6570，\u4f46\u662f\u8fd9\u6837\u505a\u592a\u6d6a\u8d39\u65f6\u95f4\u4e86，\u6ca1\u6709\u610f\u4e49\u3002\u6bd5\u7adf\u53ea\u662f<\/p>\n","protected":false},"author":2,"featured_media":79678,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-79698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-c","tag-190"],"yoast_head":"\nC++ string \u5168\u9762\u6307\u5357 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/79698.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++ string \u5168\u9762\u6307\u5357 - 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