using System;

​

#region Abstraction - Marketplace

abstract class Marketplace

{

    public string NamaMarketplace { get; set; }

    public string EmailAkun { get; set; }

​

    public Marketplace(string nama, string email)

    {

        NamaMarketplace = nama;

        EmailAkun = email;

    }

​

    public void TampilkanInfo()

    {

        Console.WriteLine($"Marketplace: {NamaMarketplace}, Email: {EmailAkun}");

    }

}

​

class Shopee : Marketplace

{

    public Shopee(string email) : base("Shopee", email) { }

}

​

class Tokopedia : Marketplace

{

    public Tokopedia(string email) : base("Tokopedia", email) { }

}

​

class Alibaba : Marketplace

{

    public Alibaba(string email) : base("Alibaba", email) { }

}

​

class JDID : Marketplace

{

    public JDID(string email) : base("JD.ID", email) { }

}

#endregion

​

#region Polymorphism - Shopee Services

class ShopeeBase

{

    public virtual void Layanan()

    {

        Console.WriteLine("Layanan dari Shopee");

    }

}

​

class ShopeePay : ShopeeBase

{

    public override void Layanan()

    {

        Console.WriteLine("Layanan ShopeePay: Dompet Digital Shopee");

    }

}

​

class SeaBank : ShopeeBase

{

    public override void Layanan()

    {

        Console.WriteLine("Layanan SeaBank: Bank Digital Shopee");

    }

}

​

class SPayLater : ShopeeBase

{

    public override void Layanan()

    {

        Console.WriteLine("Layanan SPayLater: Kredit Belanja Shopee");

    }

}

#endregion

​

#region Abstraction & Polymorphism - Pajak

abstract class Pajak

{

    public abstract void DetailPajak(string jenis, string nama, string wajibPajak);

    public abstract void PeriodePajak(int bulan, int tahun);

}

​

class PajakKendaraan : Pajak

{

    public override void DetailPajak(string jenis, string nama, string wajibPajak)

    {

        Console.WriteLine($"Jenis Pajak: {jenis}, Nama Pajak: {nama}, Wajib Pajak: {wajibPajak}");

    }

​

    public override void PeriodePajak(int bulan, int tahun)

    {

        Console.WriteLine($"Periode Pajak: {bulan}/{tahun}");

    }

}

#endregion

​

class Program

{

    static void Main()

    {

        Console.WriteLine("°°°°°°°°°°°°°°°°");

        Console.WriteLine("    by nanda    ");

        Console.WriteLine("°°°°°°°°°°°°°°°°");

        Console.WriteLine("=== Abstraction - Marketplace ===");

        Marketplace[] marketplaces = {

            new Shopee("user@shopee.com"),

            new Tokopedia("user@tokopedia.com"),

            new Alibaba("user@alibaba.com"),

            new JDID("user@jdid.com")

        };

​

        foreach (var marketplace in marketplaces)

        {

            marketplace.TampilkanInfo();

        }

​

        Console.WriteLine("\n=== Polymorphism - Shopee Services ===");

        ShopeeBase[] layanan = {

            new ShopeePay(),

            new SeaBank(),

            new SPayLater()

        };

​

        foreach (var item in layanan)

        {

            item.Layanan();

        }

​

        Console.WriteLine("\n=== Abstraction & Polymorphism - Pajak ===");

        Pajak pajakKendaraan = new PajakKendaraan();

        pajakKendaraan.DetailPajak("Pajak Kendaraan", "PKB", "Budi Santoso");

        pajakKendaraan.PeriodePajak(3, 2025);

​

        Console.WriteLine("\nTekan tombol apa saja untuk keluar...");

        Console.ReadKey();

    }

}

​