Inheritance in C++

          Inheritance is one of the object oriented concepts which deals with methods and attributes. It is the process of getting properties from base class to child class.

It has the following features.

• Reusability of code.
• Promotes logical hierarchy.
• Parent child relationships.

Key terms:

Base class: it is foundation class which has methods and attributes definition. It is also known as “Parent” class.

Derived class: it gets the details from base class. It is called “Child” class.

Types of inheritance:

The types of inheritance are given below.

Single: it has a base class and derived class.

Hierarchical: it deals with a base class with multiple derived class.

Hybrid: it is a combination of all types.

Multiple: a single inherited class with multiple base class.

Multilevel: it is a chain of inheritance.(X->Y->Z).

Let us create a c++ program to display message using inheritance:

This code creates a parent class with msg() function.

It derives a child class and creates a msgchild() function.

‘main()’ function creates the objects for both classes and call its member functions.

Program:

#include <iostream>

using namespace std;

class Parent {

public:

    void msg() {

        cout << "Hi,this is the message from parent class!" << endl;

    }

};

class child : public Parent {

public:

    void msgchild() {

        cout << "Hello, this is the message from the child class!" << endl;

    }

};

int main()

{

 Parent o1;

 o1.msg();

 child c1;

 c1.msgchild();

}

Output:

Hi,this is the message from parent class!

Hello, this is the message from the child class!

Hope, this code is helpful to you. Inheritance always utilises the code reusability. Keep coding!!!