The document explains the concept of composition in object-oriented programming (OOP) through examples, such as managing hotel rooms and a band. It highlights that when a composite object (like a floor in a hotel or a band) is destroyed, its contained objects (like rooms or band members) should also be destroyed. Composition represents a relationship in which one class is composed of other class instances, distinguishing it from inheritance.

1. Composition in OOP
Presented by Huba Akhtar

2. Definition:Definition:

3. What is Composition?What is Composition?

4. Lets Suppose:Lets Suppose:
Let's say we must manage rooms in a hotel.
We will have a class Hotel that has several
objects Floor. And each floor is composed of
several Rooms.
Using "is composed" give us a hint on the
relationship between Floor and Room.

5. Continue…Continue…
If we happen to destroy the object Floor,
what should happen to the Rooms??
If a Floor is destroy then all the Rooms
inside should also be destroy. That is aThat is a
compositioncomposition

6. Example:Example:
For Example, you could have a class called
Band. The data member of Band class
could consist of objects from the Guitarist,
Drummer, and Vocalist classes. These
objects are data member of the Band class,
but not the parent classes. They are related
by composition, not by inheritance.