\u8981\u6c42：<\/p>\n
1.\u5c06\u5b57\u7b26\u4e32s\u8f6c\u4e3a\u6574\u6570\u5e76\u8fd4\u56de，\u5373：s = "123456"，\u8f93\u51fa：123456<\/p>\n
2.\u524d\u9762\u6709\u7a7a\u683c\u65f6，\u5ffd\u7565，\u5373：s = "\u00a0 \u00a0 \u00a0 \u00a0123"，\u8f93\u51fa：123<\/p>\n
3.\u524d\u9762\u7684\u6570\u5b57\u4e3a0\u65f6，\u5ffd\u7565，\u5373：s = "00000123"，\u8f93\u51fa：123<\/p>\n
4.\u4ece\u7b2c\u4e00\u4e2a\u975e\u7a7a\u683c\u5b57\u7b26\u5f00\u59cb，\u975e\u6570\u5b57\u5b57\u7b26\u7ed3\u675f\u3002\u4e0d\u662f\u6570\u5b57\u5747\u8f93\u51fa0，\u5373：<\/p>\n
（1）s = "\u00a0 -00000123"，\u8f93\u51fa：-123<\/p>\n
（2）s = " 00+000123"，\u8f93\u51fa：0<\/p>\n
（3）s = "\u00a0 \u00a0 \u00a0 +123gr"，\u8f93\u51fa：123<\/p>\n
（4）s = "\u00a0 \u00a0 \u00a0adw -123gr"，\u8f93\u51fa：0<\/p>\n
\u6574\u578b\u6570\u636e\u8303\u56f4：2^31~2^31-1（-2147483648~2147483647）<\/p>\n
\u4ee3\u7801：<\/p>\n
\/\/\u5b57\u7b26\u4e32\u8f6c\u6362\u6574\u6570
\nint myAtoi(char* s)
\n{
\n\/\/\u53c2\u6570\u68c0\u6d4b
\nif (s == NULL)
\nreturn 0;<\/p>\n
\/\/\u53bb\u9664\u591a\u4f59\u7a7a\u683c
\nint i = 0;
\nwhile (s[i] == ' ')
\ni++;<\/p>\n
\/\/\u8d1f\u6570\u6807\u5fd7
\nint flag = 1;<\/p>\n
\/\/\u7b2c\u4e00\u4e2a\u975e\u7a7a\u683c\u5b57\u7b26\u5224\u65ad
\nif (s[i] == '+')
\ni++;
\nelse if (s[i] == '-')
\n{
\ni++;
\nflag = -1;
\n}
\nelse if (s[i] < '0' || s[i] > '9')
\nreturn 0;<\/p>\n
\/\/\u6574\u6570\u8fb9\u754c\u503c
\nconst int maxInt = 2147483647;
\nconst int minInt = -2147483647 – 1;<\/p>\n
\/\/\u5b57\u7b26\u8f6c\u5316\u6570\u5b57
\nint result = 0;
\nwhile (s[i] >= '0' && s[i] <= '9' && s[i] != '\\\\0')
\n{
\n\/\/\u6ea2\u51fa\u5224\u65ad
\nif (flag == 1)
\n{
\nif (result > maxInt \/ 10 || result == maxInt \/ 10 && s[i] – '0' >= 7 || result \/ 1000000000 > 0)
\nreturn maxInt;
\n}
\nif (flag == -1)
\n{
\nif (result > maxInt \/ 10 || result == maxInt \/ 10 && s[i] – '0' >= 8 || result \/ 1000000000 > 0)
\nreturn minInt;
\n}<\/p>\n
result *= 10;
\nresult += s[i] – '0';
\ni++;
\n}<\/p>\n
return result * flag;
\n}<\/p>\n
\u601d\u8def：<\/p>\n
\u9996\u5148，\u8fdb\u884c\u53c2\u6570\u68c0\u6d4b，\u5e76\u5c06\u6307\u9488i\u79fb\u81f3\u7b2c\u4e00\u4e2a\u4e0d\u4e3a\u7a7a\u683c\u5b57\u7b26\u7684\u4f4d\u7f6e\u3002<\/p>\n
\u6b64\u65f6，\u5bf9\u6b64\u5b57\u7b26\u5224\u65ad，\u53ea\u8981\u4e0d\u662f\u4ee5\u6b63\u8d1f\u53f7\u548c\u6570\u5b57\u5f00\u5934\u5747\u8fd4\u56de0；\u4e3a\u6b63\u8d1f\u53f7，\u6307\u9488i\u5411\u540e\u79fb\u52a81\u4f4d；\u4e14\u7ed9\u5b9a\u6b63\u8d1f\u6570\u6807\u8bb0flag\u3002<\/p>\n
\u63a5\u7740，\u904d\u5386\u5b57\u7b26\u4e32\u76f4\u5230\u51fa\u73b0\u975e\u6570\u5b57\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u4e32\u7ed3\u675f，\u6309\u4f4d\u8f6c\u5316\u6570\u5b57\u5b57\u7b26\u4e3a\u5bf9\u5e94\u7684\u6570\u5b57，\u8f6c\u5316\u65b9\u6cd5\u4e5f\u5f88\u7b80\u5355，\u7528\u6570\u5b57\u5b57\u7b26\u51cf\u53bb\u5b57\u7b260\u5373\u53ef\u5f97\u5230\u5b83\u5bf9\u5e94\u7684\u6570\u5b57\u3002<\/p>\n
\u7136\u540e，\u8003\u8651\u5230\u6574\u578b\u6570\u636e\u7684\u8fb9\u754c\u95ee\u9898，\u5b9a\u4e49\u6574\u578b\u6570\u636e\u8fb9\u754c\u503cminInt\u548cmaxInt，\u5224\u65ad\u6ea2\u51fa\u67093\u79cd\u60c5\u51b5：<\/p>\n
（1）\u5f53\u524d\u6570\u636eresult\u5927\u4e8e\u8fb9\u754c\u7684\u5341\u5206\u4e4b\u4e00，\u7531\u4e8e\u6b64\u6b21\u5faa\u73af\u4f1a\u518d\u7ed9result\u4e5810，\u6ea2\u51fa；<\/p>\n
（2）\u5f53\u524d\u6570\u636eresult\u7b49\u4e8e\u8fb9\u754c\u7684\u5341\u5206\u4e4b\u4e00，\u6b64\u65f6\u518d\u5224\u65ad\u6700\u540e\u4e00\u4f4d\u662f\u5426\u6ea2\u51fa；<\/p>\n
（3）\u5f53\u524d\u6570\u636eresult\u4e3a10\u4f4d\u6570，\u7531\u4e8e\u6b64\u6b21\u5faa\u73af\u4f1a\u518d\u7ed9result\u4e5810，\u6ea2\u51fa\u3002<\/p>\n
\u6700\u540e，\u7ed9\u8fd4\u56de\u7ed3\u679cresult\u52a0\u4e0a\u6b63\u8d1f\u53f7flag\u5e76\u8fd4\u56de\u3002<\/p>\n
\u8bed\u53e5\u89e3\u91ca：<\/p>\n
（1）const int minInt = -2147483647 – 1，\u4e4b\u6240\u4ee5\u4e0d\u76f4\u63a5\u5199-2147483648，\u662f\u56e0\u4e3a\u518dvs\u7f16\u8bd1\u5668\u4e0a\u4f1a\u5c062147483648\u8bc6\u522b\u4e3a\u65e0\u7b26\u53f7\u6574\u578b，\u65e0\u6cd5\u5728\u524d\u9762\u52a0\u8d1f\u53f7\u3002<\/p>\n
（2）result \/ 1000000000 > 0，\u8fd9\u91cc\u662f\u5728\u5224\u65adresult\u662f\u5426\u4e3a10\u4f4d\u6570，\u7528\u5b83\u9664\u4ee5\u6700\u5c0f\u768410\u4f4d\u6570\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb647\u6b21\uff0c\u70b9\u8d5e25\u6b21\uff0c\u6536\u85cf5\u6b21\u3002\uff081\uff09const int minInt = -2147483647 – 1\uff0c\u4e4b\u6240\u4ee5\u4e0d\u76f4\u63a5\u5199-2147483648\uff0c\u662f\u56e0\u4e3a\u518dvs\u7f16\u8bd1\u5668\u4e0a\u4f1a\u5c062147483648\u8bc6\u522b\u4e3a\u65e0\u7b26\u53f7\u6574\u578b\uff0c\u65e0\u6cd5\u5728\u524d\u9762\u52a0\u8d1f\u53f7\u3002\u63a5\u7740\uff0c\u904d\u5386\u5b57\u7b26\u4e32\u76f4\u5230\u51fa\u73b0\u975e\u6570\u5b57\u5b57\u7b26\u6216\u8005\u5b57\u7b26\u4e32\u7ed3\u675f\uff0c\u6309\u4f4d\u8f6c\u5316\u6570\u5b57\u5b57\u7b26\u4e3a\u5bf9\u5e94\u7684\u6570\u5b57\uff0c\u8f6c\u5316\u65b9\u6cd5\u4e5f\u5f88\u7b80\u5355\uff0c\u7528\u6570\u5b57\u5b57\u7b26\u51cf\u53bb\u5b57\u7b260\u5373\u53ef\u5f97\u5230\u5b83\u5bf9\u5e94\u7684\u6570\u5b57\u30022.\u524d\u9762\u6709\u7a7a\u683c\u65f6\uff0c\u5ffd\u7565\uff0c\u5373\uff1as = " 123"\uff0c\u8f93\u51fa\uff1a123\u30023.\u524d\u9762\u7684\u6570\u5b57\u4e3a0\u65f6\uff0c\u5ffd\u7565\uff0c\u5373\uff1as = "00000123"\uff0c\u8f93\u51fa\uff1a123\u3002<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[174,427],"topic":[],"class_list":["post-56885","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-427"],"yoast_head":"\n