This document provides an overview of basic object-oriented programming concepts including objects, classes, data abstraction and encapsulation, inheritance, polymorphism, dynamic binding, and message passing. It defines objects as run-time entities that contain both data and code, and can represent user-defined data types. Classes are introduced as templates that define common properties and behaviors of objects. The concepts of encapsulation, abstraction, inheritance and polymorphism are described as key pillars of object-oriented design. Dynamic binding and message passing are discussed as mechanisms for communication between objects at run-time.

1. Programming with c++
By
P.Kaleeshwaran(181615)
II B.Sc Mathematics(CA)
SBK College,Aruppukottai
To
K.Padma Priya M.Sc(cs),M.Phill.
Assistent Profecser
Dept of Mathematics(CA)
SBK College,Aruppukottai

2. Basicconceptsof object – oriented
programming
 Objects
 Classes
 Data abstraction and encapsulation
 Inheritance
 Polymorphism
 Dynamic binding
 Message passing

3. Object :
 Object are the basic run-time entities in
the object-oriended system.
 They may also represent user-defined
data such as vectors,time and lists.
 When a program is executed, the object
by sending messages to one another.
 Each object contains data, and code to
manipulate the data.

4. Two ways of represending an object.
Object:STUDENT
DATA
Name
Date of birth
Marks
………
FUNCTIONS
Total
Average
Display
……..
STUDENT
Total
Average
Display

5. Classes:
 The entire set of data and code of an object can
be made a user-defined data type with the help
of a class.
 Each object is associated with the data of type
class with which they are created.
 A class is thus a collection of object of similar
type.
fruit mango;
Will create an object mango belonging to the class
fruit.

6. Data abstraction and encapsulation:
ENCAPSULATION
 The wrapping up of data and function into a
single unit is known as encapsulation.
 Data encapsulation is the most striking
feature of a class.
 The insulation of the data from direct access
by program is called data hiding or
information hinding.

7. ABSTRACTION
 Abstraction refers to the act of representing
essential without including the background
details or explanations.
 The attributes are sometimes called data
member because they hold information.
 The function that operate on these data are
sometimes called methods or member
function.
 Since the classes use the concept of data
abstraction they are known as abstract data
types(ADT).

8. Inheritance
 Inheritance is the process by which object of
class acquire the properties of object of another
class.
 It supports the concept of hierarchical
classification.
 In OOP, the concept of inheritance provides the
idea of reusability
 This is possible by deriving a new class from
the existing one.

10. Polymorphism
 Polymorphism is another important OOP
concept.
 The behaviors depends upon the types of data
used in data used in the operation.
 The process of making an operator to exhibit
different behaviors in different instances is
known as operator overloading
 Using a single function name to perform
different types of tasks is known as function
overloading.

11.  Polymorphism plays an important roll in
allowing objects having different internal
structure to share the same external
interface.
Shape
Draw()
Triangle object
Draw( triangle)
Circle object
Draw (circle)
Box object
Draw (box)

12. Dynamic binding:
 Dynamic binding means that code
associated with a given procedure
call is not known util the time of the
call at run-time.
 A function call associated with a
plomorphic reference depends on the
dynamic type of that reference.

13. Message passing:
 An object-oriented program consists of a set of
object that communication with each other.
o Creating classes that define objects
and their behavior.
o Creating objects from class definitions.
o Establishing communication among objects.
 Object communication with one another by
sending and receiving information much the
same way as people pass message to one
another.

14.  Message passing involves specifying the
name of the object, the name of the function
and the information to be send.
employee.salary(name);
Object information
message
 Object have a life cycle.They can be created
and destroyed.

15. thank You