字符串回文判断

字符串回文就是从左到右阅读字符串和从右向左阅读的结果是一样的，就是说字符串是对称的。

#include <stdio.h>#include <stdlib.h>#include <string.h>intIsReverse(const char *str){if (str == NULL)return (-1);int left, right;left = 0;right = strlen(str)-1;while (left < right) {if (str[left] == str[right])left++, right--; else return (0);}return (1);}//test IsReverseStrintmain(int argc, char **argv){if (argc != 2) {printf("usage: ./a.out testStr\n");exit(1);}int res = IsReverse(argv[1]);if (res == 1)printf("true\n");else if (res == 0)printf("false\n");elseprintf("argument error\n");return 0;}