郭又瑄

1. #include<bits/stdc++.h>
   
2. using namespace std;
   
3. string str;
   
4. int n;
   
5. int main()
   
6. {
   
7.     cin>>str>>n;
   
8.     if(str[n]>='a'){
   
9.         str[n]-=32;
   
10.     }else{
    
11.         str[n]+=32;
    
12.     }
    
13.     cout<<"The letter that was selected is: "<<str[n]<<endl;
    
14.     cout<<str;
    
15.     return 0;
    
16. }

複製代碼