C语言 · 比较字符串

 1 #include<stdio.h>
 2 #include<string.h>
 3 int main(){
 4     char s1[100],s2[100];
 5     scanf("%s%s",&s1,&s2);
 6     int len1 = strlen(s1);
 7     int len2 = strlen(s2);
 8     if(len1 == len2){
 9         for(int i=0;i<len1;i++){
10             if(s1[i] == s2[i]){
11                 printf("0");
12                 return 0;
13             }
14         }
15     }else if(len1<len2){
16         for(int i=0;i<len1;i++){
17             if(s1[i] != s2[i]){
18                 printf("%d",s1[i]-s2[i]);
19                 return 0;
20             }
21         }
22     }else if(len1>len2){
23         for(int i=0;i<len2;i++){
24             if(s1[i] != s2[i]){
25                 printf("%d",s1[i]-s2[i]);
26                 return 0;
27             }
28         }
29     }
30 }