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++

You are already familiar with [Access Modifiers](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/access-modifiers) from the [Classes](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/what-is-a-class) chapter. By using these specifiers, we limit the access of the data members and member functions to the other *classes* and *main*. 

## `private` Mode of Inheritance
By using `private` inheritance, the *private* data members and member functions of the base class are inaccessible in the derived class. *Protected* and *Public* members of the base class are accessible to the derived class and behave as `private` members of the derived class.

> Note: any classes inheriting from the above-derived class remain unaware (that is, do not have access) of the base class.

Let's look at the implementation using `private` inheritance: 

You are already familiar with [Access Modifiers](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/access-modifiers) from the [Classes](https://www.educative.io/courses/learn-object-oriented-programming-in-cpp/what-is-a-class) chapter. By using these specifiers, we limit the access of the data members and member functions to the other *classes* and *main*. 

# `private` Mode of Inheritance
By using `private` inheritance, the *private* data members and member functions of the base class are inaccessible in the derived class. *Protected* and *Public* members of the base class are accessible to the derived class and behave as `private` members of the derived class.

> Note: any classes inheriting from the above-derived class remain unaware (that is, do not have access) of the base class.

Let's look at the implementation using `private` inheritance: 

In this lesson, we'll learn about how Public, Private and Protected inheritance is done in C++. 

Introduction

Classes

Data Hiding

Inheritance

Polymorphism

Conclusion

Modes of Inheritance

`private` Mode of Inheritance