#include <iostream>

int main( void )
{
        char again = 'y';

        while ( again == 'y' ) {
                std::cout << "Please enter a number: ";
                int num;
                if ( ! ( std::cin >> num ) )
                        break;
                int square = num * num;
                std::cout << "Square of " << num
                     << " = " << square << '\n';
                std::cout << "Another square? (y/n) ";
                std::cin >> again;
        }
}