using System;

​

public abstract class Voucher //titik awal Abstarct 

{

    public abstract void NomorVoucher();

    public abstract void JudulVoucher();

}

​

public class IdVoucher : Voucher

{

    public int noVoucher=827373;

    public string JdlVoucher="Voucher Top Up Gratis";

    public override void NomorVoucher()

    {

        Console.WriteLine("Nomor Voucher Anda : "+noVoucher);

    }

    public override void JudulVoucher()

    {

        Console.WriteLine("Judul Voucher : "+JdlVoucher);

    }

}//titik akhir abstarct

​

public interface IClient

{

    public void ClientVoucher();

    public void HpClientVoucher();

    public void ArmadaVoucher();

}

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

    }

}