{"id":61524,"date":"2019-07-02T16:10:44","date_gmt":"2019-07-02T10:40:44","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=61524"},"modified":"2021-07-23T13:17:40","modified_gmt":"2021-07-23T07:47:40","slug":"constructor-and-destructor-in-cpp","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/constructor-and-destructor-in-cpp\/","title":{"rendered":"Learn Constructor and Destructor in C++ in 6 Min."},"content":{"rendered":"

The terms constructor and destructor in C++ go hand in hand. Constructors<\/strong> are called each and every time you create an object and a destructor<\/strong> is called every time you destroy an object. <\/em>Today, we come up with this complete tutorial dedicated to constructors and\u00a0destructor in C++, which will help you to master this concept with syntax and examples.<\/p>\n

Before we begin, revise the concept of classes and objects in C++<\/a>.<\/strong><\/em><\/p>\n

Constructor and Destructor in C++<\/h2>\n

Constructor and Destructor in C++ are basically subtopics of Classes and Objects. It is safe to say that both of these topics are important features offered by Classes and Objects that help you dive deeper into exploring the depth of object-oriented programming. We will cover each and every topic in detail.<\/p>\n

1. What are Constructors in C++?<\/h3>\n

Till now, we studied that after defining the data members and member functions of a class, we need to create instances of the class, that is, objects through which we can access the members of the class. We do this in order to reserve memory in the computer system for the class data type.<\/p>\n

There is an important feature offered by C++<\/strong><\/a><\/em> that comes along with classes and objects. They are called constructor and destructor in C++.<\/p>\n

In programming terminology, C++ constructor is nothing but a special class function that allows you to initialize the value of each and every object associated with that class.<\/em><\/p>\n

The C++ compiler automatically calls the constructor after the creation of an object.
\nThe same purpose which a constructor in C++ serves can be served by any other member function of that class but the only difference is that we need to call that member function in the program explicitly.<\/p>\n

Key takeaway:<\/strong> It is important to note that the constructor in C++ has the same name as that of the class and it is invoked whenever the object of that class is created.<\/p>\n

From the above discussion, we infer that constructors not only saves time in implementing classes but also serves as a unique function making C++ ubiquitous.<\/em><\/p>\n

Do you know how to implement Data Abstraction in C++<\/a>?<\/strong><\/em><\/p>\n

1.1 Syntax of Constructor in C++<\/h3>\n

In this portion, we will cover the declaration and definition part of the constructor.<\/p>\n