using System;

public class Program

{

    public static void Main()

    {

        int a = 5;

        int b = 3;

        Console.WriteLine("Valores de a y b antes de funcion: {0}, {1}", a,b);

        Cambiar(ref a, ref b);

        Console.WriteLine("Valores de a y b despues de funcion: {0}, {1}", a,b);

    }

    static void Cambiar(ref int x, ref int y){

        int temp = 0 ;

        temp = x;

        x = y;

        y = temp;

    }

}