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++

## Java and C# (Pure Object-Oriented Language)

**Java** emerged as an object-oriented language in the `90's`. In **Java**, even the main function has to be inside a class, unlike **C++**. Although the design goals for creating Java were different than that of **C++**, **Java** had the leverage of overcoming and rectifying all object-oriented issues the programmers identified in **C++**, such as the [diamond problem](https://en.wikipedia.org/wiki/Multiple_inheritance#The_diamond_problem). **C#** was introduced by Microsoft in 2001 as a Java competitor. It is also a pure object-oriented language and the syntax is much similar to that of Java. 

Let's look at the implementation of `calculateSum` function in all three languages:




# Java and C# (Pure Object-Oriented Language)

**Java** emerged as an object-oriented language in the `90's`. In **Java**, even the main function has to be inside a class, unlike **C++**. Although the design goals for creating Java were different than that of **C++**, **Java** had the leverage of overcoming and rectifying all object-oriented issues the programmers identified in **C++**, such as the [diamond problem](https://en.wikipedia.org/wiki/Multiple_inheritance#The_diamond_problem). **C#** was introduced by Microsoft in 2001 as a Java competitor. It is also a pure object-oriented language and the syntax is much similar to that of Java. 

Let's look at the implementation of `calculateSum` function in all three languages:




In this lesson, we'll get to know the difference between the three popular object-oriented languages, i.e., C++, Java, and C#.

Introduction

Classes

Data Hiding

Inheritance

Polymorphism

Conclusion

C++ vs Java vs C#

Java and C# (Pure Object-Oriented Language)