Single Inheritance in c++

In this tutorial we learn the concept of Inheritance in c++.

    Inheritance is the most powerful feature in the c++ language that allows us to the code re usability. That is better for every programmer when we are required the data again and again  then instead of writing that code again use inheritance. This feature save the time as well as money and also increases the reliability.

Que:What is mean by Inheritance?

Ans: The inheritance is the creating a new class form already exiting class. The old or existing class is known as Base class (super class or parent class) and the new class is known as Derived class(child class or sub class.

Types of Inheritance:

1)Single Inheritance

2)Multiple Inheritance
 

3)Multilevel Inheritance

4)Hierarchical Inheritance
 

5)Hybrid Inheritance

Here we learn first Single Inheritance:

 This type of Inheritance is done when the new class is creating only a one Base class. The Inheritance feature is allows us to use the data of the parent class.

Syntax:

 

 Class base-Class

{

                …………………

                ………………..

};

Class derived-class:base-class

                …………………….;

                ……………………;

}

The following code shows the single inheritance of student and teacher class in this code Teacher is the super class and the Student is the drived class. The Student class is uses the feature of the Teacher class.

#include<iostream.h>

#include<conio.h>

#include<stdio.h>

class Teacher

{

                char name[20];

                public:

                                char sub[20];

                                void getdata()

                                {

                                                cout<<"\nFor Teacher:";

                                                cout<<"\nEnter Teacher Name:";

                                                gets(name);

                                                cout<<"\nEnter subject:";

                                                gets(sub);

                                }

                                void display()

                                {

                                                cout<<"\n*****Teacher Information*****";

                                                cout<<"\nName:"<<name;

                                                cout<<"\nSubject:"<<sub;

                                }

};

class Student:public Teacher

{

                char sname[20],cls[20];

                int rno;

                public:

                                void getinfo()

                                {

                                                getdata();

                                                cout<<"\nFor Student:";

                                                cout<<"\nEnter Student Name:";

                                                gets(sname);

                                                cout<<"\nEnter class of Student:";

                                                gets(cls);

                                                cout<<"\nEnter roll no of Student:";

                                                cin>>rno;

                                }

                                void show()

                                {

                                                display();

                                                cout<<"\n*****Student Information*****";

                                                cout<<"\nName:"<<sname;

                                                cout<<"\nClass:"<<cls;

                                                cout<<"\nRoll No.:"<<rno;

                                }

};

void main()

{

                Student s1;

                clrscr();

                s1.getinfo();

                s1.show();

                getch();

}

The following code shows the OUTPUT:

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Multiple Inheritance in C++.