//********************************************************************
//  Textbook.java       Author: yourname
//
//  Represents a textbook - with a title, author and edition number.
//********************************************************************
import java.text.NumberFormat;

public class Textbook
{
   private static int bookcount = 0;  // counts the number of books
   private static double value = 0;   // keeps the total value of all books

   private String  title;
   private String  author;
   private int     edition;
   private double  price;
   private boolean used;

   public Textbook(String title, String author, int edition, double price, boolean used)
   {
      this.title = title;
      this.author = author;
      this.edition = edition;
      this.price = price;
      this.used = used;

      bookcount++;
      value += price;
   }

   public void discount(double percent)
   {  
      double disc = price * percent;

      price = price - disc;
      value = value - disc;
   }

   public void discount()
   {
      double disc;

      if (used)
         disc = price * .12;
      else
         disc = price * .07; 
      
      price = price - disc;
      value = value - disc;
   }

   public static int getCount()
   { 
      return bookcount;
   }

   public static double getValue()
   {
      return value;
   }

   public String toString()
   {
      NumberFormat money = NumberFormat.getCurrencyInstance();
      return title + " by " + author + ", edition " + edition 
             + (used?" USED ":" NEW ") + money.format(price);
   }

}