Question

A bookshelf is designed to store the books in a stack with LIFO(LastInFirstOut) operation. Define a class Book with the following specifications:
Classname:Book
Data members/instance variables:

name[ ]:stores the names of the books
point:stores the index of the top most book

max:stores the maximum capacity of the bookshelf
Methods/Member functions:
Book(int cap):constructor to initialise the data members max=cap and point=-1
void tell():displays the name of the book which was last entered in the shelf.If there is no book left in the shelf,displays the message”SHELF EMPTY”
void add(String v):adds the name of the book to the shelf if possible,otherwise displays the message”SHELF FULL”
void display():displays all the names of the books available in the shelf
Specify the class Book giving the details of ONLY the functions void tell( ) and void add(String). Assume that the other functions have been defined.
The main function need not be written.

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Code

				
					public class Book
{
    String name[];
    int point,max;
    Book(int cap)
    {
        max=cap;
        point=-1;
        name=new String[max];
    }
    
    void tell()
    {
        if(point< 0)
        {
            System.out.println("SHELF EMPTY");
        }
        else
        {
            System.out.println(name[point]);
        }
    }

    void add(String v)
    {
        if(point< max-1)
        {
            name[++point]=v;
        }
        else
        {
            System.out.println("SHELF FULL");
        }
    }

    void display()
    {
        for(int i=point;i>=0;i--)
        {
            System.out.println(name[i]);
        }
    }
}