Delve into Object-Oriented Programming in C++ and discover key concepts like classes, objects, inheritance, and polymorphism to create efficient, reusable, and secure code through hands-on challenges.

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Object-oriented programming (OOP) has been around for decades. If you have a basic understanding of C++ and are interested in leveling up your skills, this class will help you do just that. 

Starting with an overview of the basics, you’ll dive into understanding the time-honored technique for implementing complex applications using user-defined classes. Followed up by discussing classes and objects, and then building up to the high-level topics including inheritance and polymorphism. 

Throughout the course, you’ll be fully immersed in OOP for C++, with illustrations, exercises, quizzes, and hands-on challenges every step of the way. You’ll walk away with an understanding of classes and objects behavior and be able to easily create simple, efficient, reusable and secure code.

Learn Object-Oriented Programming in C++

# What is a Constructor?

As the name suggests, the constructor is used to *construct* the object of a class. It is a special member function that outlines the steps that are performed when an instance of a class is created in the program.

>A constructor's **name** must be exactly the **same** as the name of its class.

The constructor is a special function because it **does not have a return type**. We do not even need to write `void` as the return type. It is a good practice to declare/define it as the first member function.

So, let's study the different types of constructors and use them to create class objects.

# Default Constructor

The default constructor is the most basic form of a constructor. Think of it this way: 

> In a default constructor, we define the default values for the data members of the class. Hence, the constructor creates an object in which the data members are initialized to their default values.

This will make sense when we look at the code below. Here, we have a **Date** class, with its default constructor, and we'll create an object out of it in `main()`:



In this lesson, we explore the world of constructors and learn why they are necessary for a class.

Introduction

Functions

Pointers

Classes

OOP in C++ Exam 1

Data Hiding

Inheritance

Polymorphism

Composition, Aggregation and Association

OOP in C++ Exam 2

Constructors

What is a Constructor?