Explore OOP in C++ to write cleaner, modular, and scalable code. Learn classes in C++, data hiding, encapsulation, abstraction, inheritance, and polymorphism in C++.

Become  a C++ Programmer

This module aims to teach us how to write cleaner, more modular, and scalable code in C++ by providing an understanding of OOP in C++. We'll start with the basics of object-oriented programming and build up to advanced concepts such as inheritance, data hiding, and polymorphism. Along the way, we'll explore how each concept applies to C++ and how various C++ features facilitate OOP.

Object-Oriented Programming in C++

## Why do We Need Inheritance?

In the [classes](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/what-is-a-class) chapter, we've covered the `HAS-A` relationship. We know a class `HAS-A` data members and member functions.  Now, we want the data members, and member functions of the class are accessible from other classes. So, the capability of a class to derive properties and characteristics from another class is called `Inheritance`. In inheritance, we have `IS-A` relationship between classes e.g a *car* is a *vehicle* and a *ship* is a *vehicle*.

Let's take the example of `Vehicle` here.

## Vehicle Class

In a Vehicle class, we have many data members like *Make*, *Color*, *Year* and *Model*. A `Vehicle` *HAS-A*  Model, Year, Color and Make. 

### Implementation of `Vehicle` Class

Let's look at the implementation of `Vehicle` class:

# Why do We Need Inheritance?

In the [classes](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/what-is-a-class) chapter, we've covered the `HAS-A` relationship. We know a class `HAS-A` data members and member functions.  Now, we want the data members, and member functions of the class are accessible from other classes. So, the capability of a class to derive properties and characteristics from another class is called `Inheritance`. In inheritance, we have `IS-A` relationship between classes e.g a *car* is a *vehicle* and a *ship* is a *vehicle*.

Let's take the example of `Vehicle` here.

# Vehicle Class

In a Vehicle class, we have many data members like *Make*, *Color*, *Year* and *Model*. A `Vehicle` *HAS-A*  Model, Year, Color and Make. 

## Implementation of `Vehicle` Class

Let's look at the implementation of `Vehicle` class:

In this lesson, we'll be learning about the core concept of the object-oriented paradigm, i.e., Inheritance and why there is a need for it? 

Introduction

Classes

Data Hiding

Inheritance

Polymorphism

Conclusion

What is Inheritance?

Why do We Need Inheritance?

Vehicle Class

Implementation of `Vehicle` Class