import java.util.Scanner;
import java.io.*;

public class Store {
    public static void main(String[] args) throws Exception {
Book[] books = readInventory();

    for (Book book : books) {
        System.out.printf("ISBN: %s, Price: %f, Copies: %d%n", book.getISBN(),    book.getPrice(), book.getCopies());
    }
 }

        public static Book[] readInventory() throws Exception {
            Book[] books = new Book[10];
            java.io.File file = new java.io.File("../instr/prog4.dat");
            Scanner fin = new Scanner(file);
            String isbn;
            double price;
            int copies;
            int i = 0;

            while (fin.hasNext()) {
                isbn = fin.next();
                    if (fin.hasNextDouble()); {
                        price = fin.nextDouble();
                    }
                    if (fin.hasNextInt()); {
                        copies = fin.nextInt();
                    }
                 Book book = new Book(isbn, price, copies);
                 books[i] = book;
                 i++;
            }
            fin.close();
            return books;
      }

     public void printInfo(Book[] books) {
        for(int x=0; x<books.length; x++)
            System.out.println("ISBN: " + books[x].getISBN() + "n Price: " +
            books[x].getPrice() + "n Copies: " + books[x].getCopies());
        }
     }

class Book {
     private String isbn;
     private double price;
     private int copies;

     public Book(String isbnNum, double priceOfBook, int copiesInStock) {
         isbn = isbnNum;
         price = priceOfBook;
         copies = copiesInStock;
     }

     public String getISBN() {
        return isbn;
     }

     public double getPrice() {
        return price;
    }

     public int getCopies() {
        return copies;
     }

     public void setISBN(String isbn) {
        this.isbn = isbn;
     }

     public void setPrice(double price) {
        this.price = price;
     }

     public void setCopies(int copies) {
        this.copies = copies;
     }

   @Override
   public String toString() {
      return String.format("ISBN: %s, Price: %f, Copies: %d%n",
        this.getISBN(), this.getPrice(), this.getCopies());
   }

}

public Book[] purchase(String isbn, double price, int copies) {
    int itemsSold;
    double totalMade;
    Scanner input = new Scanner(System.in);

    System.out.println("Please enter the ISBN number of the book you would like to purchase: ");
        desiredISBN = input.next(); // not sure if this would work since I think I'd need the whole book object that contains that ISBN?
            // search array for book object containing this ISBN number
               // if (found)
                  System.out.println("How many copies would you like to purchase?: ");
                      desiredCopies = input.nextInt();
                          if(copies == 0)
                              System.out.println("I'm sorry, but that book is currently out of stock.");
                          if(desiredCopies > copies) // copies is the number of copies in the inventory
                              System.out.println("I'm sorry, but we only have" + copies " copies of that book in our inventory. How many would you like to purchase?: ");
                                  desiredCopies = input.nextInt();
                                  itemsSold++;
                                  price +=;

System.out.println("Enter ISBN");
    isbn = input.next();
    // search array for this ISBN?

// else if (not found)
                   System.out.println("I'm sorry, we do not have that item in our store.");