// Name : Matthew Reeves 
// This is a program to create inventory for books

//creates BookInventory class
public class BookInventory
{
	//initializes instance variables
	private Book theBook;
	private int count; 	
		
	//constructor, initializes Book object to values passedin, and count to 0
	public BookInventory(Book abook) 
	{
		count=0;
		theBook=abook;
				
	}
	
	//addBook method validates number of book to add to inv, and updates inventory
	public boolean addBook (int amount)
	{
		if (amount>=0)
		{
			count+=amount;
			return true;
		}
		else 
		{
			return false;
		}
	}

	//removeBook method validates number of book to remove from inv, and updates inventory
	public boolean removeBook (int amount)
	{
		if (amount>=0 && amount<=count)
		{
			count-=amount;
			return true;
		}
		else
		{	
			return false;
		}
	}

	//allows count value to be easily retrieved
	public int getCount()
	{
		return count;
	}

	//returns a formatted string with book attributesm and number of books in inventory
        public String toString()
        {
		return String.format("%sNumber in inventory:\t %d",theBook.toString(),getCount());
	}
}