using System;

public class swapprob

{

    public static void interchange(ref int num1, ref int num2)

    {

        int newnum;

        newnum = num1;

        num1 = num2;

        num2 = newnum;

    }

    public static void Main()

    {

        int n1,n2;

        Console.Write("\nWelcome to Variable Swapping Problem!\n");

        Console.Write("firstNumber is the first variable in our program and currently holding the value of: ");

        n1= Convert.ToInt32(Console.ReadLine());

        Console.Write("secondNumber is the second variable in our program and currently holding the value of: ");

        n2= Convert.ToInt32(Console.ReadLine());        

        interchange( ref n1, ref n2 );

        Console.Write("Starting the Swapping Process...\n");

        Console.WriteLine( "firstNumber is the first variable in our program and now holding the value of: {0}\nsecondNumber is the second variable in our program and now holding the value of: {1}", n1, n2 );

    }

}