p17johnny

1. #include <iostream>
   
2. #include <cstdlib>
   
3. using namespace std;
   
4. int main(void){
   
5.    
   
6.     char a;
   
7.     int word;
   
8.    
   
9.     cout << "請輸入一個英文字母:" << endl;
   
10.     cin >> a;
    
11.      
    
12.     word = (int)a;
    
13.      
    
14.     if(word >= 65 && word <= 90){
    
15.     cout << (char)(word + 32) << endl;
    
16.     }else if(word >= 97 && word <= 122){
    
17.     cout << (char)(word - 32) << endl;
    
18.     }
    
19.    
    
20.     system("pause");
    
21.     return 0;
    
22. }

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