Object Oriented Programming : Part 2

Sep 24, 20133 likes1,364 views

This document discusses object-oriented programming concepts including: - OOP revolves around objects and classes, with classes functioning as structures and functions to define objects as instances. - The four main OOP concepts are data abstraction, encapsulation, inheritance, and polymorphism. Data abstraction treats the class as a black box, encapsulation combines related attributes and methods together in a class, inheritance allows more generalized classes to be created from the intersection of other classes' functionality, and polymorphism allows the same name to have different functionality depending on context. - Examples are provided of each concept to illustrate how they work in OOP.

OOPs
●
Object Oriented Paradigm
●
Other Paradigms :
●
Procedural : ANSI C
●
Functional : Lisp , Python Lambda/Map
●
OO : Java, Small talk, C++(Not pure)Which of the following are Pure object oriented programming languages?
a. Java
b. C++
c. Small Talk
d. C

Most read

OOPs
●
Object Oriented Paradigm
●
Other Paradigms :
●
Procedural : ANSI C
●
Functional : Lisp , Python Lambda/Map
●
OO : Java, Small talk, C++(Not pure)

OOPs
●
OOPs revolves around Objects and Classes
●
Class may be seen as Structures+Functions
●
But it is much much more

OOPs
●
OOPs revolves around Objects and Classes
●
Class may be seen as Structures+Functions
●
But it is much much more
●
Objects are INSTANCES of CLASSES

Classes and Objects
Private, can be accessed only by
class functions.
Public, can be accessed thru objects
Object!
Accessing Object members

OOPs
●
The 4 OOPs terms
●
Data Abstraction
●
Encapsulation
●
Inheritance
●
Polymorphism

OOPs – Data Abstraction
●
Treat the class as a black box
●
Dont care what algorithm is used
●
Expose usable members as interfaces.

OOPs – Encapsulation
●
All the attributes associated with a certain
object are “Encapsulated” in a Class.
●
Everything related to 1 kind of thing, in one
place.
●
Also used for Information Hiding

OOPs – Inheritance
●
More Generalization!
●
If there are 2 classes, create a new class
that has the INTERSECTION of the 2
classes' functionality.

OOPs – Polymorphism
●
Same name – different functionality
●
Function Overloading is a TYPE of
polymorphism
●
Adhoc polymorphism is another (Operator
overload)

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