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++


>**Virtual** means existing in appearance but not in reality.

### Definition

A `virtual` function is a member function which is declared within the base class and is *overridden* by the derived class. When you refer to a derived class object using a pointer or a reference to the base class, you can call a virtual function for that object and execute the derived class’s version of the function.

**Virtual** functions ensure that the correct function is called for an object, regardless of the type of reference (or pointer) used for the function call. They are mainly used to achieve Runtime polymorphism. Functions are declared with a `virtual` keyword in a base class. The function resolution call is done at run-time.


>**Virtual** means existing in appearance but not in reality.

# Definition

A `virtual` function is a member function which is declared within the base class and is *overridden* by the derived class. When you refer to a derived class object using a pointer or a reference to the base class, you can call a virtual function for that object and execute the derived class’s version of the function.

**Virtual** functions ensure that the correct function is called for an object, regardless of the type of reference (or pointer) used for the function call. They are mainly used to achieve Runtime polymorphism. Functions are declared with a `virtual` keyword in a base class. The function resolution call is done at run-time.

In this lesson, we'll be learning about a very important concept of polymorphism, i.e.,  Virtual member.

Introduction

Classes

Data Hiding

Inheritance

Polymorphism

Conclusion

Virtual Member Functions

Definition