ex3_03.cpp

Visual C++ 2005的源代码

// 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;
}