int Factorial(int input)
{
    if (input > 1)
        return input * Factorial(input - 1);
    else if (input < 0)
        throw NegativeException(input);
    else
        return 1;
}

int main()
{
    using std::cout;
    using std::cin;
    int input;

    while (1)
    {
        try
        {
            cout << "Please enter an integer to find its factorial: ";
            cin >> input;
            cout << "The factorial of " << input << " is " << Factorial(input) << endl;
        }
        catch (const std::bad_typeid & ex)
        {
            cout << "Exception: " << ex.what();
            cout << "Try another integern" << endl;
        }
        catch (NegativeException& ex1)
        {
            cout << ex1.what();
            cout << "Try another integern" << endl;
        }
    }

    return 0;
}