ExchangeIfGreater

using System;

    //  Write an if-statement that takes two integer variables a and b and
    //  exchanges their values if the first one is greater than the second one.
    //  As a result print the values a and b, separated by a space.

class ExchangeIfGreater
{
    static void Main()
    {
        Console.Write("Enter a value for a: ");
        double a = double.Parse(Console.ReadLine());
        Console.WriteLine();
        Console.Write("Enter a value for b: ");
        double b = double.Parse(Console.ReadLine());
        bool decimalpointA = Convert.ToString(a).IndexOf(".") > 0;
        bool decimalpointB = Convert.ToString(b).IndexOf(".") > 0;
        if ((decimalpointA == false) && (decimalpointB == false))
        {
            if (a > b)
            {
                a = a + b;
                b = a - b;
                a = a - b;
                Console.WriteLine();
                Console.WriteLine("{0} {1}", a, b);
                Console.WriteLine();
            }
            else
            {
                Console.WriteLine();
                Console.WriteLine("{0} {1}", a, b);
                Console.WriteLine();
            }
        }
        else
        {
            Console.WriteLine();
            Console.WriteLine("{0} {1}", a, b);
        }
    }
}