算法训练 字符串比较

 1 #include<iostream>
 2 #include<string>
 3 //author:QIANG
 4 using namespace std;
 5 int main(){
 6     string s1,s2;
 7     cin>>s1>>s2;
 8     int n,n1,n2;
 9     char c1,c2;
10     cin>>n;
11     int i;
12     for(i=0;i<n;i++){
13         c1=s1[i];
14         c2=s2[i];
15         n1=c1-‘A‘;
16         n2=c2-‘A‘;
17         if(n1>n2){
18             cout<<1;
19             break;
20         }
21         if(n1<n2){
22             cout<<-1;
23             break;
24         }
25     }
26     if(i>=n){
27         cout<<0;
28     }
29     return 0;
30 }