CSE 219

Object oriented Paradigm and Programming

By

G.SasiKumar., M.E., (Ph.D).,Assistant Professor

School of Computing Science and EngineeringVIT University

04/12/231 VIT - SCSE

Instructor G. Sasi Kumar , sasichief@gmail.com

Venue : SJT – 302 Textbook

K.R. Venugopal, T. Ravishankar, and Rajkumar, "Mastering C++”, Tata McGraw Hill, 2008 .

Requirements Homework x2 5% (do not copy) CAT 30% Quiz & Oral presentation 15% Final exam 50%

Course Webpage

intranet.vit.ac.inhttps://www.facebook.com/groups/

oopskg2013/ Mail: oopskg2013@groups.facebook.com

Office: SasiKumar Gurumurthy SJT -310-A08 mobile:8870919338 g.sasikumar@vit.ac.in

Software1. System software2. Application software

System software: Directly interacts with the computer system. Operating system, compiler, interpreter are examples for this.Application software: All the programs written by a user with the help of any software is called as application software.

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Introduction to Programming Languages

The shift in programming language is categorized as following:

1.Monolithic Programming2.Procedural Programming3.Structural Programming4.Object Oriented Programming

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Monolithic Programming

This programming consists only global

data and sequential code.

Assembly language and BASIC

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Procedural Oriented Programming

Mainly comprises of algorithms.

FORTRAN and COBOL

The important features of Procedural Programming

areEmphasis is on doing things (algorithms)Large programs are divided into smaller programs

known as functions.Most of the functions share global dataData move openly around the system from function to

functionFunctions transform data from one form to anotherEmploys top-down approach in program design

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Structured programming

Pascal and CStructured programming is based upon the

algorithm rather than dataPrograms are divided into individual modules

that perform different task.Introduction of user defined data types

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Object Oriented Programming

C++, Smalltalk, Eiffel, Java, C# etc.Object oriented programming is a

programming methodology that associates data structures with a set of operators, which act upon it.

Depending on the object features supported, the languages are classified into two categories:

Object-Based Programming LanguagesObject-Oriented Programming Languages

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Object-based programming languages support encapsulation and object identity without supporting inheritance, polymorphism and message communications.

Example ADA.Object – Based language = Encapsulation + Object Identity

Object-Oriented Programming Language incorporate all the features of object-based programming languages along with inheritance and polymorphism.Object-oriented programming language = Object Based Language + Polymorphism +Inheritance

04/12/2310 VIT - SCSE

Features of Object oriented Programming

Improvement of over the structured programming languages.

Emphasis on data rather than algorithmData is hidden and cannot be accessed by

external functionsObjects may communicate with each other

through functionsNew data and functions can be easily added

whenever necessaryFollows bottom –up approach in program

design04/12/2311 VIT - SCSE

Basic concepts of object oriented programming

Objects – data and functionClassesData Abstraction : the act of representing

essential features without including the background details or explanations.

Encapsulation – data and function into a single unit

InheritancePolymorphismMessage Passing : It is the process of invoking

an operation on an object.Ex: ob.add(50);

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Advantages of OOPThrough inheritance we can eliminate redundant

(Unnecessary) code and extend the use of existing classes.

The principle of data hiding helps for security.It is possible to have multiple objects.It is easy to partition the work in a project based

on objects.Object-oriented systems can be easily upgraded

from small to large systems.Message passing techniques for communication

between objectsCode reuse is possible.

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Applications of OOPReal time systemsSimulation and modeling Object oriented databasesHypertext and hypermediaAI and expert systemsNeural networks and parallel programmingOffice automation systemsCIM / CAM / CAD systems

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