using System;

​

public class A

{

    public void B(ref int c)

    {

        c*=c;

        System.Console.Write("\n \n We just changed the value in function : "+ c);

    }

    public static void Main()

    {

        int y;

        Console.Write("\n \n Hey,Please enter a value : ");

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

        Console.Write("\n \n You just entered "+ y +" Okay... ");

        Console.Write("\n \n Calling the function now");

        A call=new A();

        call.B(ref y);

        Console.Write("\n\n After change here is updated value : " + y);

    }

}