BookStore

import java.util.Scanner;

public class BookStore {
    Book[] books = new Book[10];
    int length=books.length;
    void sell(String bookTitle,int noOfCopies)
    {
        int i;
        for (i=0;i<length;i++)
        {
            if(books[i]==null)
            {
                break;
            }

            if(bookTitle.equals(books[i].bookTitle))
            {
                if(books[i].numOfCopies>noOfCopies)
                {
                    books[i].numOfCopies-=noOfCopies;
                    break;
                }
                else
                    System.out.println("Number of copies is not available");

            }
        }
    }
    void order(String isbn,int noOfCopies)
    {
        int i,flag=0;
        for (i=0;i<length;i++)
        {
            if(books[i]==null)
            {
                flag=1;
                break;
            }
            if(isbn.equals(books[i].isbn))
            {
                books[i].numOfCopies+=noOfCopies;
                break;
            }
            if(flag==1)
            {
                Scanner sc = new Scanner(System.in);
                System.out.println("Enter the author name: ");
                books[i]=new Book(isbn, isbn, isbn, noOfCopies);
                books[i].author=sc.nextLine();
                System.out.println("Enter the book title: ");
                books[i].bookTitle=sc.nextLine();
                books[i].isbn=isbn;
                books[i].numOfCopies=noOfCopies;
            }

        }

    }
    void display()
    {
        for(int i=0;i<10;i++)
        {
            if(books[i]==null)
                break;
            else
                System.out.println("Title: " + books[i].bookTitle + " Author: " + books[i].author + " ISBN: " + books[i].isbn + " Quantity: " + books[i].numOfCopies);
        }
    }
}