Question

Implement a simple program that simulates a book library. Your program should use object-oriented concepts such as inheritance, polymorphism, and encapsulation. Only submit the text of your source code, not the program file. Here are the requirements for your program:

1. Define a class named Book that contains the following instance variables:

Answer 1

The question involves creating a program simulating a book library using object-oriented principles. The base class should be 'Book' with subclasses for different book types.

Step-by-step explanation:

The student's question is about implementing a simple program that simulates a book library with object-oriented concepts such as inheritance, polymorphism, and encapsulation. Consider beginning with a class Book that contains instance variables like title, author, and ISBN. You could then extend this base class with derived classes representing different types of books. Use encapsulation by making the instance variables private and providing getter and setter methods. Polymorphism can be applied by defining methods that behave differently in derived classes. Each class should use encapsulation with private variables and public getters and setters, and polymorphism through methods like 'getDescription()' that behave differently in each subclass.

For example, you might have a method getDescription() that returns a string. In a subclass ScienceBook, it could return a description including the field of science the book covers. In FictionBook, it could return the genre of the fiction. This illustrates how the same method call, book.getDescription(), can yield different results depending on the object's class.