Method updateInventory

Programs/bookShop.java:65–102

()

	
	// function to update inventory - 
	public void updateInventory() {
		System.out.println("Menu: ");
		System.out.println("1. Engineering");
		System.out.println("2. Non-fiction");
		System.out.println("3. Fiction");
		System.out.println("4. Children's ");
		System.out.println("5. Comics");
		System.out.println("6. Classics");
		System.out.println("7. Exit");
		do {
			System.out.println("Enter genre of book that was purchased by customer: ");
			ch = sc.nextInt();
			switch (ch) {
			case 1:
				engg--;
				break;
			case 2:
				nonfiction--;
				break;
			case 3:
				fiction--;
				break;
			case 4:
				childrens--;
				break;
			case 5:
				comics--;
				break;
			case 6:
				classics--;
				break;
			default:
				if (ch != 7) {
					System.out.println("Invalid input! Please enter correct choice!");
				}
			} 
		} while (ch != 7);
	}
	
	// function to display details of book inventory - 
	public void displayInventory() {