using System;

interface ibook

{

     ////int bid;

     //string book_name;

     //double bprice;

     void book_det(int id,string n,double p);

}

interface ibooks{

     void book_dets(int y,string au);

}

public class data:ibook

{

    public void book_det(int id,string n,double p)

    {

        Console.WriteLine("BOOK ID "+ id);

        Console.WriteLine("BOOK NAME "+ n);

        Console.WriteLine("BOOK PRICE "+ p);

    }

}

public class dan:ibooks

{

    public void book_dets(int y,string au)

    {

        Console.WriteLine("PUBLISH YEAR "+ y);

        Console.WriteLine("AUTHOR NAME"+ au);

        //Console.WriteLine("BOOK PRICE "+ p);

    }

}

////class all:ibooks

​

 //  Console.WriteLine("WELCOME");

  //public void jen(int p)

    //{

       // Console.WriteLine("PAGES "+ p);

        //Console.WriteLine("AUTHOR NAME"+ au);

        //Console.WriteLine("BOOK PRICE "+ p);

    //}

​

​

public class ban{

    public static void Main()

    {

        //ibook dd1=new data();

        ibooks dd = new dan();

        dd.book_dets(2345,"life style of harbour",1278);

    }

}