聿均

1. #include <bits/stdc++.h>
   
2. using namespace std;
   
3. int main()
   
4. {
   
5.     int n;
   
6.     string str;
   
7.     cin>>str>>n;
   
8.     if(str[n]<='Z')
   
9.         str[n]+=32;
   
10.     else
    
11.         str[n]-=32;
    
12.     cout<<"The letter that was selected is: "<<str[n]<<endl;
    
13.     cout<<str;
    
14.     return 0;
    
15. }

複製代碼