// Ex3_03.cpp
  // Testing for a letter using logical operators
  include <iostream>
  
  using std::cin;
  using std::cout;
  using std::endl;
  
  int main()
  {
     char letter = 0;                                 // Store input in here
  
     cout << endl
          << "Enter a character: ";
     cin >> letter;
  
     if(((letter >= 'A') && (letter <= 'Z')) ||
        ((letter >= 'a') && (letter <= 'z')))         // Test for alphabetic
        cout << endl
             << "You entered a letter." << endl;
     else
        cout << endl
             << "You didn't enter a letter." << endl;
     return 0;
  }