using System;

public class calc

{

    internal void test(int x,int y)

    {

        x++;

        y--;

        Console.WriteLine("Formal parameters :{0},{1}",x,y);

    }

    internal void test1(ref int x,ref int y)

    {

        x=x+y;

        y++;

        Console.WriteLine("Formal parameters :{0},{1}",x,y);

    }

    internal void test2(int x,int y,out int z)

    {

        z=x+y;

        Console.WriteLine("Formal Parameters : {0},{1},{2}",x,y,z);

    }

    internal void test3(params int[] now)

    {

        for(int i=0;i<now.Length;i++)

        {

            Console.Write(now[i]);

            Console.Write(" ");

        }

    }

​

}

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        calc c= new calc();

        int a = Convert.ToInt32(Console.ReadLine());

        int b = Convert.ToInt32(Console.ReadLine());

        c.test(a,b);//Pass by value

        Console.WriteLine("Actual Paramters:{0},{1}",a,b);

        c.test1(ref a, ref b);//Pass by refernce

        Console.WriteLine("Actual Paramters:{0},{1}",a,b);

        int d;

        c.test2(a,b,out d);

        Console.WriteLine("Actual Paramters:{0},{1},{2}",a,b,d);

        c.test3(1 ,2 ,3, 4, 5);

    }

}