C++ was developed by Bjarne Stroustrup as an extension of C with classes and objects. It allows for real-world modeling through classes that can represent objects with both attributes and behaviors. A class is a user-defined datatype that is similar to a structure but includes data hiding - data is private by default. An object is an instance of a class, representing a variable of a user-defined type like a class.

2. BASICS OF C++

3. INTRODUCTION
• Developed by Bjarne Stroustrup
• Initially known as C with classes
• C + Simula 67  C++
Increment
operator

4. WHY C++
PROBLEMS WITH STRUCTURED PROGRAMMING:
Unrestricted Access to GLOBAL DATA

5. WHY C++
RealWorld Modelling
• In the physical world we deal with objects such as people and cars.
• Such objects aren’t like data and they aren’t like functions. Complex real-
world objects have both attributes and behaviour.

6. Examples of attributes (sometimes called characteristics) are,
for people - eye colour and job title;
Behaviour is something a real-world object does in response to some
stimulus.
If you ask your boss for a raise,
she will generally say yes or no.

7. What is class???
User defined datatype
Similar to structure datatype
Structure + Data Hiding  class
Data is private by default
Includes member variables and member functions in class definition
Hiding data from another
functions in order to avoid
unintentional modification

8. What is class???
Member variable
Member function

9. What is object???
Blueprint of a class
Instance of a class
Variable of type class
int rollno;
student S1;
Basic datatype
User-defined datatype