C++ Constructor2 min read

In C++, a constructor is a special type of method that is called automatically when an instance of the class (object) is created. The compiler calls the constructor and is used to initialize the data members of a newly created object.

The constructor has the same name as its class. Also, it doe not have any return type not even void.

Let us first look at the syntax of constructor in c++


Types of Constructor in C++

  1. Default constructor
  2. Parameterized constructor

C++ Default constructor

The constructor with no arguments is called a default constructor.

Let us look into the example of the C++ default Constructor.

Output:

Side: 12.4

Note: Default Constructor is used if the user does not define a constructor then the compiler creates a default constructor and initializes the member variables to its default values.


C++ Parameterized Constructor

A Constructor having a specific number of parameters is called Parameterized Constructor. Passing parameters is useful when you want to assign an initial value to an object at the time of its creation.

Let us look into the example of the C++ Parameterized Constructor.

Output:

Area: 24
Area: 9.8


MORE

Keith Number Program in C

In this tutorial, we will write a Keith number in C. It is one of the most asked questions in an interview. Before that, you …
Read More

Keith Number Program in C++

In this tutorial, we will write a Keith number in C++. It is one of the most asked questions in an interview. Before that, you …
Read More

Singly linked list Program C++

In this tutorial, we will write a C++ program to implement singly linked list. In this program, we will create a separate function for each …
Read More

Fascinating Number Program in C

In this tutorial, we will write a C program to check whether the given number is a Fascinating number or not. You may go through …
Read More

Peterson Number in C

In this tutorial, we will learn about the Peterson number and check if the number is Peterson or not in C. What is Peterson Number? …
Read More

Peterson Number in C++

In this tutorial, we will learn about the Peterson number and write a C++ program to check if the given number is a Peterson number …
Read More