![](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032318-6abdd226d398f.png\")
https:\/\/blog.csdn.net\/Bai_YangSQ\/article\/details\/166643289<\/span><\/span>）\u3002\u4ece\u4eca\u5929\u5f00\u59cb\u9010\u4e2a\u62c6\u89e3\u5bb9\u5668，\u7b2c\u4e00\u7ad9\u2014\u2014string\u3002<\/p>\nstring \u53ef\u80fd\u662f\u4f60 STL \u751f\u6daf\u91cc\u4f7f\u7528\u9891\u7387\u6700\u9ad8\u7684\u5bb9\u5668，\u6ca1\u6709\u4e4b\u4e00\u3002\u5185\u5bb9\u6bd4\u8f83\u591a，\u6211\u62c6\u6210\u4e09\u7bc7：<\/p>\n
- \n
- \u4e0a\u7bc7（\u672c\u6587）：\u8ba4\u8bc6 string\u2014\u2014\u4e3a\u4ec0\u4e48\u5b66\u3001\u600e\u4e48\u6784\u9020\u3001\u4e09\u5927\u904d\u5386\u65b9\u5f0f\u4e00\u6761\u9f99（operator[] \u2192 \u8fed\u4ee3\u5668 \u2192 auto \u2192 \u8303\u56f4for，\u73af\u73af\u76f8\u6263）<\/li>\n
- \u4e2d\u7bc7：\u63a5\u53e3\u5927\u5168\u2014\u2014\u5bb9\u91cf\u64cd\u4f5c\u3001\u589e\u5220\u6539\u67e5，\u4e00\u7bc7\u5403\u900f\u6240\u6709\u5e38\u7528\u63a5\u53e3<\/li>\n
- \u4e0b\u7bc7：\u5b9e\u6218\u4e0e\u539f\u7406\u2014\u2014OJ \u5237\u9898 + \u624b\u5199\u6a21\u62df\u5b9e\u73b0（\u9762\u8bd5\u5b98\u6700\u7231\u95ee\u7684\u6d45\u62f7\u8d1d\/\u6df1\u62f7\u8d1d）<\/li>\n<\/ul>\n
\u5185\u5bb9\u4f9d\u65e7\u5e72\u8d27\u6ee1\u6ee1，\u8ba9\u6211\u4eec\u5f00\u59cb\u5427！！！<\/p>\n
\u4e00\u3001\u4e3a\u4ec0\u4e48\u5b66\u4e60string\u7c7b<\/h3>\n
1.1 C\u8bed\u8a00\u5b57\u7b26\u4e32\u7684\u75db<\/h4>\n
\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
C \u8bed\u8a00\u7684\u5b57\u7b26\u4e32\u662f \u2018\\\\0\u2019 \u7ed3\u5c3e\u7684\u5b57\u7b26\u96c6\u5408，\u9760 str \u7cfb\u5217\u5e93\u51fd\u6570\u64cd\u4f5c：\u51fd\u6570\u548c\u6570\u636e\u5206\u79bb\u3001\u7a7a\u95f4\u8981\u81ea\u5df1\u7ba1\u3001\u4e00\u4e0d\u5c0f\u5fc3\u5c31\u8d8a\u754c\u3002<\/p>\n
\u5728 C \u91cc\u64cd\u4f5c\u5b57\u7b26\u4e32\u7684\u65e5\u5e38：strlen<\/span> <\/span><\/span>\u8981\u81ea\u5df1\u7b97\u957f\u5ea6\u3001strcat<\/span> <\/span><\/span>\u8981\u81ea\u5df1\u7ba1\u5bb9\u91cf\u3001strstr<\/span> <\/span><\/span>\u8981\u5224\u7a7a\u2014\u2014\u5b57\u7b26\u4e32\u548c\u64cd\u4f5c\u5b83\u7684\u51fd\u6570\u662f\u5206\u79bb\u7684，\u5e95\u5c42\u7a7a\u95f4\u8fd8\u5f97\u81ea\u5df1\u7ef4\u62a4，\u7a0d\u4e0d\u7559\u795e\u5c31\u8d8a\u754c\u8bbf\u95ee\u3002\u800c string \u628a\u6570\u636e\u548c\u64cd\u4f5c\u5c01\u88c5\u5728\u4e00\u8d77，\u81ea\u52a8\u7ba1\u7406\u5185\u5b58\u3001\u81ea\u52a8\u6269\u5bb9，\u63a5\u53e3\u76f4\u89c2\u597d\u8bb0\u3002<\/p>\n
1.2 \u73b0\u5b9e\u4e2d\u7684\u9700\u6c42<\/h4>\n
\u73b0\u5b9e\u4e2d\u6709\u592a\u591a"\u6570\u5b57\u5927\u5230\u5b58\u4e0d\u4e0b"\u7684\u573a\u666f：\u8eab\u4efd\u8bc1\u53f7\u3001\u94f6\u884c\u5361\u53f7\u3001\u8ba2\u5355\u53f7\u2026\u2026\u8fd9\u4e9b"\u6570\u5b57"\u65e9\u5c31\u8d85\u8fc7\u4e86 int \u751a\u81f3 long long \u7684\u5b58\u50a8\u4e0a\u9650，\u66f4\u522b\u8bf4\u5b83\u4eec\u524d\u9762\u8fd8\u53ef\u80fd\u6709\u524d\u5bfc 0\u3002\u8fd9\u7c7b\u6570\u636e\u672c\u8d28\u4e0a\u5c31\u662f\u4e00\u4e32\u5b57\u7b26，string <\/span>\u5c31\u662f\u4e3a\u5b83\u4eec\u800c\u751f\u7684\u3002<\/p>\n
<\/h4>\n
1.3 \u4e24\u4e2a\u9762\u8bd5\u9898（\u5148\u611f\u53d7\u4e00\u4e0b）<\/h4>\n
- \n
- \u5b57\u7b26\u4e32\u8f6c\u6574\u5f62\u6570\u5b57 \u2192 LeetCode 8. \u5b57\u7b26\u4e32\u8f6c\u6362\u6574\u6570 (atoi)<\/li>\n
- \u5b57\u7b26\u4e32\u76f8\u52a0 \u2192 LeetCode 415. \u5b57\u7b26\u4e32\u76f8\u52a0<\/li>\n<\/ul>\n
\u5148\u522b\u6025\u7740\u505a\u2014\u2014\u73b0\u5728\u4f60\u8fde string \u7684\u63a5\u53e3\u90fd\u8fd8\u6ca1\u5b66，\u786c\u505a\u53ea\u4f1a\u6253\u51fb\u4fe1\u5fc3\u3002\u8fd9\u4e24\u9898\u7684\u5b8c\u6574\u601d\u8def\u548c\u89e3\u7b54\u6211\u90fd\u653e\u5728\u4e86\u4e0b\u7bc7\u7684 OJ \u5b9e\u6218\u91cc（\u672a\u6765\u5373\u5c06\u66f4\u65b0），\u5b66\u5b8c\u63a5\u53e3\u56de\u6765\u6536\u5b83\u4eec，\u6b63\u597d\u68c0\u9a8c\u4f60\u7684\u719f\u7ec3\u5ea6\u3002<\/p>\n
\u5728 OJ \u4e2d，\u5b57\u7b26\u4e32\u76f8\u5173\u7684\u9898\u57fa\u672c\u90fd\u4ee5 string \u5f62\u5f0f\u51fa\u73b0；\u5de5\u4f5c\u4e2d\u4e5f\u51e0\u4e4e\u6ca1\u4eba\u518d\u7528 C \u5e93\u5b57\u7b26\u4e32\u51fd\u6570\u3002string \u4e0d\u662f\u9009\u4fee，\u662f\u521a\u9700\u3002<\/p>\n
\u4e8c\u3001\u4e00\u5f20\u56fe\u7406\u6e05string<\/h3>\n
\u521d\u89c1 string，\u5148\u634b\u4e00\u634b\u77e5\u8bc6\u7ed3\u6784，\u5fc3\u91cc\u6709\u5f20\u5730\u56fe，\u540e\u9762\u5c31\u4e0d\u8ff7\u8def：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032318-6abdd226d9b36.png\")
<\/p>\n2.1 \u5934\u6587\u4ef6\u4e0e\u4e8c\u516b\u539f\u5219<\/h4>\n
\u5934\u6587\u4ef6\u53eb #include <string><\/span>（<\/span>\u6ce8\u610f\u533a\u5206 C \u8bed\u8a00\u7684 <string.h><\/span><\/span>）\u3002<\/p>\n
string \u56e0\u4e3a\u5386\u53f2\u95ee\u9898\u63a5\u53e3\u975e\u5e38\u591a，\u4f46\u6839\u636e\u4e8c\u516b\u539f\u5219，\u6211\u4eec\u53ea\u9700\u8981\u638c\u63e1\u5e38\u7528\u7684 20% \u5c31\u591f\u4e86，\u5269\u4e0b\u51b7\u95e8\u7684\u7528\u5230\u4e86\u518d\u67e5\u6587\u6863\u3002\u672c\u6587\u6bcf\u5f20\u8868\u683c\u91cc\u6211\u90fd\u4f1a\u6807\u6ce8：<\/p>\n
- \n
- （\u91cd\u70b9）：\u5fc5\u987b\u4f1a\u7528<\/li>\n
- （\u4e86\u89e3）：\u77e5\u9053\u6709\u8fd9\u56de\u4e8b，\u7528\u5230\u4e86\u518d\u67e5<\/li>\n
- （\u5197\u4f59）：\u6709\u5176\u4ed6\u63a5\u53e3\u53ef\u4ee5\u66ff\u4ee3，\u9762\u8bd5\u80fd\u8bf4\u4e0a\u4e24\u53e5\u5373\u53ef<\/li>\n<\/ul>\n
\u67e5\u63a5\u53e3\u7684\u4f20\u9001\u95e8：<string> – C++ Reference （C++ Reference \u6587\u6863，\u9047\u5230\u4e0d\u4f1a\u7684\u63a5\u53e3\u5c31\u6765\u8fd9\u67e5）<\/p>\n
\u4e09\u3001string \u7684\u6784\u9020\u63a5\u53e3<\/h3>\n
3.1 \u63a5\u53e3\u901f\u67e5\u8868\u683c<\/h4>\n
\n
\u540d\u79f0\u51fd\u6570\u7b7e\u540d\u8bf4\u660e<\/tr>\n \n\n \u9ed8\u8ba4\u6784\u9020（\u91cd\u70b9）<\/td>\n string()<\/span><\/span><\/td>\n \u6784\u9020\u7a7a\u7684 string \u5bf9\u8c61<\/td>\n<\/tr>\n \n \u62f7\u8d1d\u6784\u9020（\u91cd\u70b9）<\/td>\n string(const string& str)<\/span><\/span><\/td>\n \u7528\u53e6\u4e00\u4e2a string \u5bf9\u8c61\u62f7\u8d1d<\/td>\n<\/tr>\n \n \u5b50\u4e32\u6784\u9020<\/td>\n string(const string& str, size_t pos, size_t len = npos)<\/span><\/span><\/td>\n \u53d6 str \u4ece pos \u5f00\u59cb\u7684 len \u4e2a\u5b57\u7b26；len \u8d85\u51fa\u8303\u56f4\u5219\u53d6\u5230\u672b\u5c3e<\/td>\n<\/tr>\n \n C \u5b57\u7b26\u4e32\u6784\u9020（\u91cd\u70b9）<\/td>\n string(const char* s)<\/span><\/span><\/td>\n \u7528 C \u98ce\u683c\u5b57\u7b26\u4e32\u521d\u59cb\u5316<\/td>\n<\/tr>\n \n \u5b57\u7b26\u5e8f\u5217\u6784\u9020<\/td>\n string(const char* s, size_t n)<\/span><\/span><\/td>\n \u53d6\u5b57\u7b26\u6570\u7ec4\u7684\u524d n \u4e2a\u5b57\u7b26<\/td>\n<\/tr>\n \n \u586b\u5145\u6784\u9020<\/td>\n string(size_t n, char c)<\/span><\/span><\/td>\n \u6784\u9020\u5305\u542b n \u4e2a\u5b57\u7b26 c \u7684\u5b57\u7b26\u4e32<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 3.2 \u6d4b\u8bd5\u4ee3\u7801<\/h4>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\nint main()
\n{
\n string s1; \/\/ (1) \u9ed8\u8ba4\u6784\u9020：\u7a7a\u4e32
\n string s2("hello bit"); \/\/ (4) C\u5b57\u7b26\u4e32\u6784\u9020
\n string s3(s2); \/\/ (2) \u62f7\u8d1d\u6784\u9020
\n string s4(3, 'x'); \/\/ (6) \u586b\u5145\u6784\u9020："xxx"
\n string s5 = "hello bit"; \/\/ \u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\u6784\u9020
\n string s6("hello world", 5);\/\/ (5) \u53d6\u524d5\u4e2a\u5b57\u7b26："hello"<\/p>\ncout << "s1: [" << s1 << "]" << endl;
\n cout << "s2: " << s2 << endl;
\n cout << "s3: " << s3 << endl;
\n cout << "s4: " << s4 << endl;
\n cout << "s5: " << s5 << endl;
\n cout << "s6: " << s6 << endl;
\n return 0;
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：\u5982\u4e0b\u56fe<\/p>\n
s1: [] s2: hello bit s3: hello bit s4: xxx s5: hello bit s6: hello<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032319-6abdd2271ce50.png\")
<\/p>\n3.3 npos \u662f\u4ec0\u4e48（\u91cd\u70b9\u8865\u5145）<\/h4>\n
\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
npos \u662f string \u7684\u9759\u6001\u6210\u5458\u5e38\u91cf，\u503c\u4e3a size_t \u7684\u6700\u5927\u503c（size_t \u662f\u65e0\u7b26\u53f7\u7c7b\u578b，-1 \u8f6c\u8fc7\u53bb\u5c31\u662f\u6700\u5927\u503c）\u3002\u7528\u4f5c\u53c2\u6570\u65f6\u8868\u793a"\u76f4\u5230\u5b57\u7b26\u4e32\u672b\u5c3e"，\u7528\u4f5c\u8fd4\u56de\u503c\u65f6\u8868\u793a"\u6ca1\u627e\u5230"\u3002<\/p>\n
\u5f88\u591a\u63a5\u53e3\u90fd\u9ed8\u8ba4\u5e26 <\/span>pos<\/span> <\/span><\/span>\u53c2\u6570，\u6bd4\u5982\u5b50\u4e32\u6784\u9020 <\/span>string(str, pos, len = npos)<\/span>\u2014\u2014len<\/span><\/span> \u9ed8\u8ba4\u5c31\u662f npos，\u610f\u601d\u662f"\u4e0d\u6307\u5b9a\u5c31\u4ece pos \u53d6\u5230\u7ed3\u5c3e"\u3002\u8fd9\u4e2a\u8001\u670b\u53cb\u5728\u67e5\u627e\u63a5\u53e3（find）<\/span>\u91cc\u8fd8\u4f1a\u518d\u89c1\u9762\u3002<\/p>\n
\u56db\u3001\u4e09\u5927\u904d\u5386\u65b9\u5f0f（\u4e00\u6761\u9f99）<\/h3>\n
\u904d\u5386 string \u6709\u4e09\u79cd\u65b9\u5f0f，\u5b83\u4eec\u7684\u8bb2\u89e3\u987a\u5e8f\u662f\u7cbe\u5fc3\u8bbe\u8ba1\u7684：operator[]（\u6700\u6734\u7d20）\u2192 \u8fed\u4ee3\u5668（\u6700\u901a\u7528，\u4f46\u7c7b\u578b\u540d\u957f）\u2192 auto（\u89e3\u51b3\u7c7b\u578b\u540d\u957f\u7684\u75db\u70b9）\u2192 \u8303\u56f4for（auto + \u8fed\u4ee3\u5668\u7684\u96c6\u5927\u6210）\u3002\u5b66\u5b8c\u4f60\u4f1a\u53d1\u73b0\u5b83\u4eec\u73af\u73af\u76f8\u6263，\u4e0d\u662f\u4e09\u4e2a\u5b64\u7acb\u7684\u77e5\u8bc6\u70b9\u3002<\/p>\n
4.1 \u7b2c\u4e00\u79cd：operator[] + \u4e0b\u6807<\/h4>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032319-6abdd227702b6.png\")
<\/p>\n\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
string \u672c\u8d28\u662f"\u5b57\u7b26\u6570\u7ec4"，\u53ef\u4ee5\u50cf\u6570\u7ec4\u4e00\u6837\u7528 [\u4e0b\u6807] \u8bbf\u95ee\u548c\u4fee\u6539\u6bcf\u4e2a\u5b57\u7b26\u3002\u4e0b\u6807\u8303\u56f4\u662f [0, size)\u3002<\/p>\n
\u5728\u6b63\u5f0f\u904d\u5386\u524d，\u5148\u8865\u4e24\u4e2a\u5c0f\u63a5\u53e3：<\/p>\n
\n
\u63a5\u53e3\u4f5c\u7528\u8bf4\u660e<\/tr>\n \n\n size()<\/span><\/span><\/td>\n \u8fd4\u56de\u5b57\u7b26\u4e32\u6709\u6548\u5b57\u7b26\u4e2a\u6570<\/td>\n \u4e0d\u542b \u2018\\\\0\u2019<\/td>\n<\/tr>\n \n c_str()<\/span><\/span><\/td>\n \u8fd4\u56de C \u98ce\u683c\u5b57\u7b26\u4e32\u6307\u9488（const char*）<\/td>\n \u548c C \u5e93\u51fd\u6570\u914d\u5408\u65f6\u7528<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n ![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032319-6abdd2278e365.png\")
<\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032319-6abdd227b0c57.png\")
<\/p>\n\u622a\u56fe\u7686\u6765\u81ea：<string> – C++ Reference\u00a0<\/p>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\nint main()
\n{
\n string str("123456789");<\/p>\n\/\/ \u7528 size() \u63a7\u5236\u4e0b\u6807\u8303\u56f4
\n for (size_t i = 0; i < str.size(); ++i)
\n cout << str[i] << " ";
\n cout << endl;<\/p>\n\/\/ operator[] \u8fd8\u652f\u6301\u4fee\u6539
\n str[0] = 'A';
\n cout << str << endl; \/\/ A23456789<\/p>\n\/\/ c_str()：\u548c C \u5e93\u51fd\u6570\u914d\u5408
\n printf("%s\\\\n", str.c_str());
\n return 0;
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：\u5982\u56fe<\/p>\n
1 2 3 4 5 6 7 8 9\u00a0 \u00a0 \u00a0\u00a0 A23456789\u00a0 \u00a0 \u00a0A23456789<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032319-6abdd227d4032.png\")
<\/p>\n\u5751\u70b9：operator[] \u8d8a\u754c\u8bbf\u95ee\u4e0d\u4f1a\u62a5\u7f16\u8bd1\u9519\u8bef，\u8fd0\u884c\u65f6\u76f4\u63a5\u5d29（assert \u65ad\u8a00\u5931\u8d25）\u3002\u6570\u7ec4\u53ef\u6ca1\u8fd9\u79cd"\u5b89\u5168\u68c0\u67e5"\u3002<\/p>\n<\/p>\n
4.2 \u7b2c\u4e8c\u79cd：\u8fed\u4ee3\u5668<\/h4>\n
4.2.1 \u8fed\u4ee3\u5668\u662f\u4ec0\u4e48\u3001\u4e3a\u4ec0\u4e48\u5b58\u5728<\/h5>\n
\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
\u8fed\u4ee3\u5668\u662f\u4e00\u4e2a"\u62bd\u8c61\u7684\u8bbf\u95ee\u5668"，\u7528\u7edf\u4e00\u7684\u65b9\u5f0f\u987a\u5e8f\u8bbf\u95ee\u5bb9\u5668\u5143\u7d20，\u800c\u4e0d\u66b4\u9732\u5bb9\u5668\u7684\u5e95\u5c42\u5b58\u50a8\u7ed3\u6784\u3002\u5b83\u7684\u7528\u6cd5\u548c\u6307\u9488\u975e\u5e38\u50cf，\u4f46\u5e95\u5c42\u4e0d\u4e00\u5b9a\u662f\u6307\u9488\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u8981\u8d39\u52b2\u53d1\u660e\u8fed\u4ee3\u5668？\u56e0\u4e3a\u6bcf\u4e2a\u5bb9\u5668\u7684\u5b58\u50a8\u7ed3\u6784\u4e0d\u540c（string \u662f\u6570\u7ec4\u3001list \u662f\u94fe\u8868\u3001map \u662f\u7ea2\u9ed1\u6811），\u5982\u679c\u6bcf\u4e2a\u5bb9\u5668\u90fd\u7528\u81ea\u5df1\u7684\u4e00\u5957\u904d\u5386\u65b9\u5f0f，\u7a0b\u5e8f\u5458\u6bcf\u5b66\u4e00\u4e2a\u5bb9\u5668\u5c31\u8981\u5b66\u4e00\u5957\u65b0\u8bed\u6cd5\u3002\u8fed\u4ee3\u5668\u628a\u904d\u5386\u7edf\u4e00\u6210\u4e00\u5957：begin()<\/span> \u62ff\u8d77\u70b9\u3001++ <\/span>\u5f80\u540e\u8d70\u3001* <\/span>\u53d6\u5143\u7d20\u3001end()<\/span> \u5224\u65ad\u7ed3\u675f\u2014\u2014\u4e00\u6b21\u5b66\u4f1a，\u5904\u5904\u901a\u7528\u3002<\/p>\n
string \u5e95\u5c42\u662f\u6570\u7ec4，\u6240\u4ee5 string \u7684\u8fed\u4ee3\u5668\u5e95\u5c42\u5c31\u662f\u6307\u9488；<\/span><\/span>\u4f46\u540e\u9762\u5b66\u7684 list\u3001map \u7684\u8fed\u4ee3\u5668\u5e95\u5c42\u5c31\u4e0d\u662f\u6307\u9488\u4e86\u3002<\/p>\n
4.2.2 \u8fed\u4ee3\u5668\u56db\u5144\u5f1f<\/h5>\n
\u6211\u4eec\u5148\u7406\u89e3\u4e00\u4e0b\u8fd9\u4e00\u5806\u63a5\u53e3：<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032320-6abdd2284cd51.png\")
<\/p>\n\n
\u51fd\u6570\u8bf4\u660e<\/tr>\n \n\n begin()<\/span> \/ <\/span>end()<\/span><\/span><\/td>\n \u6b63\u5411\u8fed\u4ee3\u5668：begin \u6307\u5411\u7b2c\u4e00\u4e2a\u5b57\u7b26，end \u6307\u5411\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e<\/td>\n<\/tr>\n \n rbegin()<\/span> \/ <\/span>rend()<\/span><\/span><\/td>\n \u53cd\u5411\u8fed\u4ee3\u5668：rbegin \u6307\u5411\u6700\u540e\u4e00\u4e2a\u5b57\u7b26，rend \u6307\u5411\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u524d\u4e00\u4e2a\u4f4d\u7f6e<\/td>\n<\/tr>\n \n cbegin()<\/span> \/ <\/span>cend()<\/span><\/span><\/td>\n const \u6b63\u5411\u8fed\u4ee3\u5668（\u53ea\u8bfb），C++11<\/td>\n<\/tr>\n \n crbegin()<\/span> \/ <\/span>crend()<\/span><\/span><\/td>\n const \u53cd\u5411\u8fed\u4ee3\u5668（\u53ea\u8bfb），C++11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n 4.2.3 \u6d4b\u8bd5\u4ee3\u7801（\u9010\u6b65\u5206\u6790）<\/h5>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\nint main()
\n{
\n string str("hello");
\n string::iterator it = str.begin(); \/\/ 1.\u62ff\u5230\u6307\u5411\u9996\u5b57\u7b26\u7684\u8fed\u4ee3\u5668
\n while (it != str.end()) \/\/ 2.end() \u662f\u7ed3\u675f\u6807\u5fd7
\n {
\n cout << *it << " "; \/\/ 3.\u89e3\u5f15\u7528\u62ff\u5230\u5b57\u7b26
\n ++it; \/\/ 4.\u8fed\u4ee3\u5668\u5411\u540e\u79fb\u52a8
\n }
\n cout << endl;
\n return 0;
\n} <\/p>\n\u9010\u6b65\u5206\u6790：<\/p>\n
- begin() <\/span>\u8fd4\u56de\u4e00\u4e2a\u6307\u5411\u5b57\u7b26\u4e32\u9996\u5b57\u7b26\u7684\u8fed\u4ee3\u5668，\u4ea4\u7ed9 it<\/span><\/li>\n
- \u5faa\u73af\u6761\u4ef6 it != end()：<\/span>end() \u662f\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e，it \u8d70\u5230\u90a3\u8bf4\u660e\u904d\u5386\u5b8c\u4e86<\/li>\n
- *it<\/span> \u89e3\u5f15\u7528，\u62ff\u5230\u5f53\u524d\u6307\u5411\u7684\u5b57\u7b26<\/li>\n
- ++it<\/span> \u8ba9\u8fed\u4ee3\u5668\u5411\u540e\u8d70\u4e00\u4e2a\u5b57\u7b26<\/li>\n
\u6253\u5370\u7ed3\u679c：h e l l o<\/p>\n
\u53cd\u5411\u8fed\u4ee3\u5668\u540c\u7406：<\/p>\n
string::reverse_iterator rit = str.rbegin(); \/\/ \u6307\u5411\u6700\u540e\u4e00\u4e2a\u5b57\u7b26
\nwhile (rit != str.rend()) \/\/ rend \u662f\u7b2c\u4e00\u4e2a\u5b57\u7b26\u7684\u524d\u4e00\u4e2a\u4f4d\u7f6e
\n{
\n cout << *rit << " ";
\n ++rit; \/\/ \u6ce8\u610f：\u53cd\u5411\u8fed\u4ee3\u5668 ++ \u662f\u5f80\u524d\u8d70
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：<\/p>\n
o l l e h<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032320-6abdd2287465b.png\")
<\/p>\n4.2.4 \u8fed\u4ee3\u5668\u7684\u6ce8\u610f\u4e8b\u9879<\/h5>\n
- \u6c38\u8fdc\u662f\u5de6\u95ed\u53f3\u5f00\u533a\u95f4：[begin(), end())<\/span>\u3001<\/span>[rbegin(), rend())<\/span><\/span><\/li>\n
- const \u8fed\u4ee3\u5668\u548c const \u4fee\u9970\u7684\u8fed\u4ee3\u5668\u4e0d\u662f\u4e00\u56de\u4e8b：const \u8fed\u4ee3\u5668（const_iterator<\/span>）\u662f\u5b83\u6307\u5411\u7684\u5185\u5bb9\u4e0d\u80fd\u6539；const \u4fee\u9970\u7684\u8fed\u4ee3\u5668（const string::iterator<\/span>）\u662f\u8fd9\u4e2a\u8fed\u4ee3\u5668\u672c\u8eab\u4e0d\u80fd\u6539（\u4e0d\u80fd ++，\u4e00\u822c\u6ca1\u4eba\u8fd9\u4e48\u7528）<\/li>\n
- \u8fed\u4ee3\u5668\u5931\u6548\u95ee\u9898\u7b49\u5b66\u5230 vector \u7ec6\u8bb2，\u5148\u57cb\u4e2a\u4f0f\u7b14<\/li>\n
\u5230\u8fd9\u91cc，\u4f60\u5e94\u8be5\u5df2\u7ecf\u5f00\u59cb\u89c9\u5f97\u54ea\u91cc\u4e0d\u5bf9\u52b2\u4e86：string::iterator <\/span>\u8fd9\u4e2a\u7c7b\u578b\u540d\u600e\u4e48\u8fd9\u4e48\u957f？ \u522b\u6025，\u4e0b\u4e00\u4e2a\u4e3b\u89d2\u5c31\u662f\u6765\u89e3\u51b3\u8fd9\u4e2a\u75db\u70b9\u7684\u3002<\/p>\n
4.3 \u7b2c\u4e09\u79cd：auto\u2014\u2014\u7c7b\u578b\u592a\u957f？\u4ea4\u7ed9\u7f16\u8bd1\u5668<\/h4>\n
\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
auto \u662f\u7c7b\u578b\u6307\u793a\u7b26，\u7f16\u8bd1\u5668\u5728\u7f16\u8bd1\u671f\u6839\u636e\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u63a8\u5bfc\u53d8\u91cf\u7c7b\u578b\u3002\u5b83\u6700\u5927\u7684\u7528\u6b66\u4e4b\u5730，\u5c31\u662f\u4e0a\u4e00\u8282\u6211\u4eec\u521a\u4f53\u9a8c\u8fc7\u7684"\u7c7b\u578b\u540d\u957f\u5230\u79bb\u8c31"\u7684\u573a\u666f\u3002<\/p>\n
\u521a\u5199\u5b8c \u00a0\u00a0string::iterator it = str.begin()<\/span>，\u518d\u628a\u8fed\u4ee3\u5668\u7c7b\u578b\u66ff\u6362\u6210 auto：<\/p>\n
string str("hello");<\/p>\n
\/\/ \u5b8c\u6574\u5199\u6cd5：\u7c7b\u578b\u540d\u5f88\u957f
\nstring::iterator it1 = str.begin();<\/p>\n\/\/ auto \u5199\u6cd5：\u8ba9\u7f16\u8bd1\u5668\u81ea\u5df1\u63a8\u5bfc
\nauto it2 = str.begin(); <\/p>\n\u4e24\u8005\u5b8c\u5168\u7b49\u4ef7\u3002\u5982\u679c\u89c9\u5f97 string::iterator \u8fd8\u4e0d\u591f\u957f，\u770b\u770b map \u7684\u8fed\u4ee3\u5668\u2014\u2014\u6ca1\u6709 auto \u7684\u65f6\u5019，\u4e00\u884c\u90fd\u5199\u4e0d\u4e0b：<\/p>\n
#include <iostream>
\n#include <string>
\n#include <map>
\nusing namespace std;<\/p>\nint main()
\n{
\n map<string, string> dict = { { "apple", "\u82f9\u679c" }, { "orange", "\u6a59\u5b50" }, { "pear", "\u68a8" } };<\/p>\n\/\/ \u6ca1\u6709 auto：\u4e00\u884c\u5199\u4e0d\u4e0b，\u624b\u90fd\u5199\u62bd\u7b4b
\n \/\/ map<string, string>::iterator it = dict.begin();<\/p>\nauto it = dict.begin(); \/\/ \u6709 auto：\u723d！
\n while (it != dict.end())
\n {
\n cout << it->first << ":" << it->second << endl;
\n ++it;
\n }
\n return 0;
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：<\/p>\n
apple:\u82f9\u679c\u00a0 \u00a0orange:\u6a59\u5b50\u00a0 \u00a0 pear:\u68a8<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032320-6abdd228c04ab.png\")
<\/p>\nauto \u7684\u4f7f\u7528\u89c4\u5219（\u91cd\u70b9）：<\/p>\n
int x = 10;
\nauto y = &x; \/\/ y \u662f int*，auto \u548c auto* \u6ca1\u533a\u522b
\nauto* z = &x; \/\/ z \u662f int*，\u540c\u4e0a
\nauto& m = x; \/\/ m \u662f int&，\u58f0\u660e\u5f15\u7528\u5fc5\u987b\u52a0 &<\/p>\nauto aa = 1, bb = 2; \/\/ OK：\u540c\u4e00\u884c\u7c7b\u578b\u5fc5\u987b\u4e00\u81f4
\n\/\/ auto cc = 3, dd = 4.0; \/\/ error：\u7f16\u8bd1\u5668\u53ea\u5bf9\u7b2c\u4e00\u4e2a\u7c7b\u578b\u63a8\u5bfc，3 \u548c 4.0 \u7c7b\u578b\u4e0d\u540c
\n\/\/ auto e; \/\/ error：auto \u5fc5\u987b\u521d\u59cb\u5316
\n\/\/ auto array[] = {4,5,6}; \/\/ error：auto \u4e0d\u80fd\u76f4\u63a5\u58f0\u660e\u6570\u7ec4 <\/p>\n\u5751\u70b9\u603b\u7ed3：<\/p>\n
- auto \u58f0\u660e\u7684\u53d8\u91cf\u5fc5\u987b\u521d\u59cb\u5316\u2014\u2014\u7f16\u8bd1\u5668\u8981"\u770b\u89c1"\u521d\u59cb\u503c\u624d\u80fd\u63a8\u5bfc<\/li>\n
- \u540c\u4e00\u884c\u591a\u4e2a auto \u53d8\u91cf\u7c7b\u578b\u5fc5\u987b\u76f8\u540c<\/li>\n
- auto \u58f0\u660e\u5f15\u7528\u8981\u52a0 &<\/span>；\u58f0\u660e\u6307\u9488 auto <\/span>\u548c auto* <\/span>\u7b49\u4ef7<\/li>\n
- auto \u4e0d\u80fd\u505a\u51fd\u6570\u53c2\u6570（void f(auto a) \u62a5\u9519）；\u53ef\u4ee5\u505a\u8fd4\u56de\u503c，\u4f46\u5efa\u8bae\u8c28\u614e\u4f7f\u7528（\u964d\u4f4e\u4e86\u53ef\u8bfb\u6027）<\/li>\n
- auto \u4e0d\u80fd\u76f4\u63a5\u58f0\u660e\u6570\u7ec4<\/li>\n
\u5982\u4f55\u67e5\u770b\u63a8\u5bfc\u51fa\u6765\u7684\u7c7b\u578b？\u7528 typeid(x).name()：<\/span><\/p>\n
int a = 10;
\nauto b = a; \/\/ int
\nauto c = 'a'; \/\/ char
\ncout << typeid(b).name() << endl;
\ncout << typeid(c).name() << endl; <\/p>\n\u6253\u5370\u7ed3\u679c<\/p>\n
int\u00a0 \u00a0 char<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032321-6abdd22929ac0.png\")
<\/p>\n\u987a\u5e26\u8bf4\u4e00\u53e5：auto \u4e0d\u53ea\u662f\u7ed9\u8fed\u4ee3\u5668\u7528\u7684，\u5b83\u9002\u7528\u4e8e\u4e00\u5207\u7c7b\u578b\u63a8\u5bfc\u573a\u666f（\u6bd4\u5982 auto d = 3.14;<\/span>），\u53ea\u4e0d\u8fc7\u5728 STL \u91cc\u5b83\u7684\u4e3b\u573a\u5c31\u662f\u8fed\u4ee3\u5668\u3002<\/p>\n
4.4 \u7b2c\u56db\u79cd：\u8303\u56f4for\u2014\u2014\u5168\u81ea\u52a8\u904d\u5386<\/h4>\n
\u5148\u8bf4\u7ed3\u8bba：<\/p>\n
\u8303\u56f4 for \u81ea\u52a8\u8fed\u4ee3\u3001\u81ea\u52a8\u53d6\u6570\u636e\u3001\u81ea\u52a8\u5224\u65ad\u7ed3\u675f\u3002\u62ec\u53f7\u91cc\u5192\u53f7\u5de6\u8fb9\u662f\u8fed\u4ee3\u53d8\u91cf，\u53f3\u8fb9\u662f\u88ab\u8fed\u4ee3\u7684\u8303\u56f4\u3002\u5b66\u5b8c 4.2 \u518d\u770b\u5b83：\u8303\u56f4 for \u7684\u5e95\u5c42\u5c31\u662f\u8fed\u4ee3\u5668\u2014\u2014\u5982\u679c\u8bf4\u8fed\u4ee3\u5668\u662f\u534a\u81ea\u52a8\u673a，\u8303\u56f4 for \u5c31\u662f\u5168\u81ea\u52a8\u673a\u3002<\/p>\n
\u8fd8\u8bb0\u5f97 4.2 \u7684\u8fed\u4ee3\u5668\u904d\u5386\u5417？\u8303\u56f4 for \u628a\u5b83\u6d53\u7f29\u6210\u4e86\u4e00\u884c：<\/p>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\nint main()
\n{
\n string str("hello world");<\/p>\nfor (auto ch : str) \/\/ \u81ea\u52a8\u53d6\u51fa\u6bcf\u4e2a\u5b57\u7b26\u7ed9 ch
\n cout << ch << " ";
\n cout << endl;<\/p>\nint arr[] = { 1, 2, 3, 4, 5 };
\n for (auto e : arr) \/\/ \u6570\u7ec4\u4e5f\u80fd\u8303\u56f4for
\n cout << e << " ";
\n cout << endl;
\n return 0;
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：<\/p>\n
h e l\u00a0 l o\u00a0 \u00a0 \u00a0w o r l d\u00a0<\/p>\n
1 2 3 4 5\u00a0<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032321-6abdd229715ea.png\")
<\/p>\n4.4.1 \u4e00\u9053\u7ecf\u5178\u9898\u5f15\u5165：\u8303\u56f4for\u4fee\u6539\u5143\u7d20<\/h5>\n
\u4e0b\u9762\u4ee3\u7801\u60f3\u901a\u8fc7\u8303\u56f4 for \u628a\u5b57\u7b26\u4e32\u6bcf\u4e2a\u5b57\u7b26\u90fd\u6539\u6210 \u2018x\u2019，\u770b\u770b\u7ed3\u679c：<\/p>\n
#include <iostream>
\n#include <string>
\nusing namespace std;<\/p>\nint main()
\n{
\n string str("hello");<\/p>\nfor (auto ch : str) \/\/ \u60f3\u4fee\u6539\u6bcf\u4e2a\u5b57\u7b26
\n ch = 'x';<\/p>\ncout << str << endl; \/\/ \u6253\u5370\u51fa\u6765\u662f\u4ec0\u4e48？
\n return 0;
\n} <\/p>\n\u6253\u5370\u7ed3\u679c：<\/p>\n
hello<\/p>\n
\u50bb\u773c\u4e86\u5427，\u6839\u672c\u6ca1\u6539！\u4e3a\u4ec0\u4e48？<\/span><\/p>\n
\u539f\u56e0\u4e0e\u539f\u7406： \u8303\u56f4 for \u5e95\u5c42\u4f1a\u88ab\u7f16\u8bd1\u5668\u66ff\u6362\u6210\u8fed\u4ee3\u5668\u904d\u5386（4.2 \u8bb2\u7684），ch \u62ff\u5230\u7684\u662f *it \u7684\u4e00\u4efd\u62f7\u8d1d，\u6539\u62f7\u8d1d\u5f53\u7136\u5f71\u54cd\u4e0d\u5230\u539f\u5b57\u7b26\u4e32\u3002<\/p>\n
\u89e3\u51b3\u529e\u6cd5： \u628a auto \u6539\u6210 auto&<\/span>\u2014\u2014ch \u53d8\u6210\u5b57\u7b26\u4e32\u91cc\u5b57\u7b26\u7684\u5f15\u7528（\u522b\u540d），\u6539 ch \u5c31\u662f\u6539\u539f\u5b57\u7b26：<\/p>\n
\u770b\u524d\u540e\u8fd0\u884c\u7ed3\u679c：
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261001032321-6abdd229d38bc.png\")
<\/p>\n\u539f\u5219：\u8981\u4fee\u6539\u96c6\u5408\u91cc\u7684\u5143\u7d20，\u8fed\u4ee3\u53d8\u91cf\u5fc5\u987b\u7528\u5f15\u7528 auto&；\u5bf9\u8c61\u6bd4\u8f83\u5927\u7684\u8bdd，\u4e5f\u5efa\u8bae\u52a0\u5f15\u7528（\u907f\u514d\u62f7\u8d1d\u7684\u5f00\u9500）\u3002<\/p>\n
4.4.2 \u4e09\u5927\u904d\u5386\u65b9\u5f0f\u5c0f\u7ed3<\/h5>\n
\n
\u65b9\u5f0f\u9002\u5408\u573a\u666f<\/tr>\n \n\n operator[]<\/td>\n \u9700\u8981\u6309\u4e0b\u6807\u8bbf\u95ee（\u6bd4\u5982\u7b2c i \u4e2a\u5b57\u7b26）<\/td>\n<\/tr>\n \n \u8fed\u4ee3\u5668<\/td>\n \u901a\u7528\u5199\u6cd5，STL \u5168\u5bb6\u6876\u901a\u7528<\/td>\n<\/tr>\n \n \u8303\u56f4 for<\/td>\n \u4ece\u5934\u5230\u5c3e\u65e0\u8111\u904d\u5386（\u6700\u5e38\u7528）<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u4e94\u3001\u6700\u7ec8\u603b\u7ed3<\/h3>\n
- C \u5b57\u7b26\u4e32\u4e4b\u75db：\u51fd\u6570\u4e0e\u6570\u636e\u5206\u79bb\u3001\u7a7a\u95f4\u81ea\u5df1\u7ba1\u3001\u5bb9\u6613\u8d8a\u754c\u2014\u2014string \u4e00\u7ad9\u5f0f\u89e3\u51b3<\/li>\n
- \u4e00\u5f20\u56fe\u8bb0\u4f4f： \u2192 basic_string \u6a21\u677f \u2192 string\/wstring\/u16string\/u32string<\/li>\n
- \u6784\u9020\u91cd\u70b9：\u9ed8\u8ba4\u6784\u9020\u3001C \u5b57\u7b26\u4e32\u6784\u9020\u3001\u62f7\u8d1d\u6784\u9020；npos \u662f size_t \u6700\u5927\u503c<\/li>\n
- \u904d\u5386\u4e00\u6761\u9f99：operator[] \u6309\u4e0b\u6807（\u6700\u6734\u7d20）\u2192 \u8fed\u4ee3\u5668（\u6700\u901a\u7528，\u7c7b\u578b\u540d\u957f）\u2192 auto（\u6551\u661f）\u2192 \u8303\u56f4for（auto + \u8fed\u4ee3\u5668\u96c6\u5927\u6210）<\/li>\n
- \u8fed\u4ee3\u5668\u5de6\u95ed\u53f3\u5f00；const_iterator \u662f\u5185\u5bb9\u53ea\u8bfb；\u7528\u6cd5\u50cf\u6307\u9488，\u5e95\u5c42\u4e0d\u4e00\u5b9a\u662f\u6307\u9488<\/li>\n
- auto：\u7f16\u8bd1\u671f\u63a8\u5bfc\u3001\u5fc5\u987b\u521d\u59cb\u5316；\u4e0d\u80fd\u505a\u53c2\u6570\u3001\u540c\u4e00\u884c\u7c7b\u578b\u8981\u4e00\u81f4\u3001\u4e0d\u80fd\u58f0\u660e\u6570\u7ec4<\/li>\n
- \u8303\u56f4 for：\u5168\u81ea\u52a8\u904d\u5386；\u4fee\u6539\u5143\u7d20\u5fc5\u987b\u7528 auto&，\u5426\u5219\u6539\u7684\u662f\u62f7\u8d1d<\/li>\n
\u597d\u4e86\u672c\u671f\u5185\u5bb9\u5c31\u5230\u8fd9\u91cc\u3002\u4e0b\u7bc7\u8fdb\u5165\u63a5\u53e3\u5927\u5168\u2014\u2014\u5bb9\u91cf\u3001\u589e\u5220\u6539\u67e5，\u6bcf\u4e2a\u63a5\u53e3\u914d\u6d4b\u8bd5\u4ee3\u7801\u548c\u6253\u5370\u7ed3\u679c，\u8ddf\u7740\u6572\u4e00\u904d\u5c31\u80fd\u4e0a\u624b\u3002\u5982\u679c\u5bf9\u4f60\u6709\u5e2e\u52a9，\u4e0d\u8981\u5fd8\u8bb0\u70b9\u8d5e\u4e09\u8fde\u4e00\u6ce2\u54e6，\u6211\u662f\u767d\u6768，\u6211\u4eec\u4e0b\u671f\u89c1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u76ee\u5f55
\n0.1 \u6982\u8ff0&\u5e8f\u8a00
\n\u4e00\u3001\u4e3a\u4ec0\u4e48\u5b66\u4e60string\u7c7b
\n1.1 C\u8bed\u8a00\u5b57\u7b26\u4e32\u7684\u75db
\n1.2 \u73b0\u5b9e\u4e2d\u7684\u9700\u6c42 1.3 \u4e24\u4e2a\u9762\u8bd5\u9898（\u5148\u611f\u53d7\u4e00\u4e0b）
\n\u4e8c\u3001\u4e00\u5f20\u56fe\u7406\u6e05string
\n2.1 \u5934\u6587\u4ef6\u4e0e\u4e8c\u516b\u539f\u5219
\n\u4e09\u3001string \u7684\u6784\u9020\u63a5\u53e3
\n3.1 \u63a5\u53e3\u901f\u67e5\u8868\u683c
\n3.2 \u6d4b\u8bd5\u4ee3\u7801
\n3.3 npos \u662f\u4ec0\u4e48（\u91cd\u70b9\u8865\u5145）
\n\u56db\u3001\u4e09\u5927\u904d\u5386\u65b9\u5f0f（\u4e00\u6761\u9f99）
\n4.1 \u7b2c\u4e00\u79cd：operato<\/p>\n","protected":false},"author":2,"featured_media":111629,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[11653,55,99,3759,190,305],"topic":[],"class_list":["post-111642","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-11653","tag-c","tag-java","tag-stl","tag-190","tag-305"],"yoast_head":"\nC++\u5165\u95e8\u7bc7\uff08\u5341\uff09\uff1astring\uff08\u4e0a\uff09\u2014\u2014\u8ba4\u8bc6string\uff1a\u6784\u9020\u4e0e\u4e09\u5927\u904d\u5386\uff08\u4e00\u6761\u9f99\u8bb2\u900foperator[]\u3001\u8fed\u4ee3\u5668\u3001auto\u3001\u8303\u56f4for\uff09 - \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\/111642.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C++\u5165\u95e8\u7bc7\uff08\u5341\uff09\uff1astring\uff08\u4e0a\uff09\u2014\u2014\u8ba4\u8bc6string\uff1a\u6784\u9020\u4e0e\u4e09\u5927\u904d\u5386\uff08\u4e00\u6761\u9f99\u8bb2\u900foperator[]\u3001\u8fed\u4ee3\u5668\u3001auto\u3001\u8303\u56f4for\uff09 - 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