Presented by :• Kunal N. Sharma

• Shyam D. Hathaliya

Presentation on POP vs OOP

Outline:•Procedure oriented programming language.

•Introduction to pop

•Characteristics

•Advantages

•Disadvantages

•Object Oriented programming language.•Introduction to OOP

•Concepts of OOP

•Advantages

•Disadvantages

•Difference between OOP vs. POP.

What is procedural oriented programming?

•computer programming language that specifies a series of well-

structured steps and procedures within its programming context to

compose a program.

•It contains a systematic order of statements, functions and

commands to complete a computational task or program.

• In the procedure oriented approach, the problem is viewed as

a sequence of things to be done such as reading, calculating and

printing.

Some characteristics of Procedure Oriented

Programming:

•Large programs are divided into smaller programs known

as functions.

•Most of the functions share

global data.

•Data can easily flow from

one function to another.

•Functions transform data from one form to another.

•Employs top-down approach in program design.

Advantages of procedural oriented programming:

•Allows quick completion. It is faster than oop.

•It is good for general purpose programming.

•It has portable source code-use different compiler to target

Different CPUs.

•Large reference is available on well-tired tested algorithms

No need to reinvent the wheel.

•Requires less memory space.

Disadvantages of procedural oriented programming:

•It is difficult to relate with the real world objects.

•The codes are difficult to maintain, if code grow large.

•It does not have automatic memory management like java.

•There is no security of data.

•Difficult to modify old codes.

•There are no access specifies.

What Object-Oriented Programming?

• Object-oriented programming is centred on

creating objects rather than procedures/

functions.

• Objects are a melding of data and procedures

that manipulate that data.

• Data in an object are known as attributes.

• Procedures/functions in an object are known

as methods.

• Object

• Class

• Message

• Basic Principles of Object Orientation

• Abstraction

• Encapsulation

• Inheritance

• Polymorphism

• Interface and Abstract Class

Concepts of object oriented programming:

• Informally, an object represents an entity, either physical,

conceptual, or software.

– Physical entity

– Conceptual entity

– Software entity

Truck

Chemical Process

Linked List

• The state of an object normally changes over time.

Name: J ClarkEmployee ID: 567138HireDate: 07/25/1991Status: TenuredDiscipline: FinanceMaxLoad: 3

Name: J ClarkEmployee ID: 567138Date Hired: July 25, 1991Status: TenuredDiscipline: FinanceMaximum Course Load: 3 classes

Professor Clark

Professor Clark

• Behavior determines how an object acts and reacts.

• The visible behavior of an object is modeled by the set of

messages it can respond to (operations the object can perform).

Professor Clark’s behaviorSubmit Final GradesAccept Course OfferingTake SabbaticalMaximum Course Load: 3 classes TakeSabbatical()

Professor Clark

Professor Clark

Modularity is a fundamental aspect of all

successful large programs.

Abstraction

Emphasizes relevant characteristics.

Suppresses other characteristics

Data Abstraction:

BriefCase- Capacity- Weight

+ open()

+ close()

• Encapsulation means to design, produce, and describe software so that it can be easily used without knowing the details of how it works.

• Also known as information hiding

Interface

Implementation details which are invisible for client

Information which can’t be accessed by client

Client Deposit()Withdraw()Transfer()

BalanceinsterestYTDOwnerAccount_number

Deposit() {…}Withdraw() {…}Transfer() {…}

• Inheritance —a way of organizing classes

• Term comes from inheritance of traits like eye color, hair color,

and so on.

• Classes with properties in common can be grouped so that

their common properties are only defined once.

• Is an “is a kind of” relationship

Vehicle

Automobile Motorcycle Bus

Sedan Sports Car School Bus Luxury Bus

Polymorphism:

•The word polymorphism comes from Greek and means having

several different forms. This is one of the essential concepts of

object-oriented programming.

• Where inheritance is related to classes and (their hierarchy),

polymorphism is related to object methods.

•Types of polymorphism :Overloading polymorphismParametric polymorphism

Advantages of Object-Oriented languages include:

•Ease of management.

•Understand ability.

•Re-usability.

•Improved software-development productivity.

•Improved software maintainability.

•Faster development.

•Lower cost of development.

•Higher-quality software.

•The disadvantages of Object-Oriented languages include:

•Over-generalization.

•Programs that are built using this language tend to take

longer to initially create.

•Slower program.

Object oriented programming.Vs

Procedural oriented programming.

OOP POP

Centres in data types (classes,

prototypes)

Functions.

Data scope encapsulated data global data

What is firstdata types then algorithms algorithms then data types

Subroutines are calledmethods functions

Who access who

data is accessed by code, i.e.

ObjectInstance.getMeARando

mNumber();

code is accessed by data, i.e.

random_number =

getMeARandomNumber();

Have global dataNo, but objects can have

public members

Yes, but functions can have

private variables

Data is calledmember variable

Any Questions?