C语言不用strcmp函数比较字符串大小

C语言不用strcmp函数比较字符串大小

#include <stdio.h>int main(){int i, res;char s1[100], s2[100];printf("请输入两个字符串：");gets(s1);gets(s2);i = 0;while ((s1[i] == s2[i]) && (s1[i] != '\0'))i++;if (s1[i] == '\0'&&s2[i] == '\0') {res = 0;}else {res = s1[i] - s2[i];}printf("%d\n",res);return 0;}