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a guest Apr 18th, 2019 71 Never
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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class Letter{
  6. private:
  7.     char c;
  8. public:
  9.     Letter(char a){
  10.         c = a;
  11.     }
  12.  
  13.     void print(){
  14.         cout << c << endl;
  15.     }
  16.  
  17.     void changeTo(char a){
  18.         c = a;
  19.     }
  20.  
  21.     char toLowerCase(){
  22.         return tolower(c);
  23.     }
  24.  
  25.     char toUpperCase(){
  26.         return toupper(c);
  27.     }
  28.  
  29.     bool isVowel() {
  30.         char ch = tolower(c);
  31.         if(ch=='a' || ch=='e' || ch=='i' || ch=='o' || ch=='u' || ch == 'y')
  32.             return true;
  33.         else return false;
  34.     }
  35. };
  36.  
  37. int main() {
  38.     Letter a('a');
  39.  
  40.     Letter b('B');
  41.  
  42.     cout << a.isVowel() << endl;
  43.     cout << b.isVowel() << endl;
  44.     cout << a.toUpperCase() << endl;
  45.     cout << b.toLowerCase() << endl;
  46.  
  47.  
  48.  
  49.     return 0;
  50. }
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