Inheritance in C++

Inheritance:

It is process by which object of one class acquire the properties and functionalities of object of another class.

The class that is predefined is called as base or super class, and the class which use the existing class is called as derived class or sub class.

The various type of inheritance those are provided by C++ is as follows:

                                i.            Single Inheritance

                              ii.            Multi level Inheritance

                            iii.            Multiple Inheritance

                           iv.            Hierarchical Inheritance

                             v.            Hybrid Inheritance

i.                    Single Inheritance:

In this, there is only one super class & only one sub class, means they have one to one communication between them.

ii.                  Multi level Inheritance:

In this, a derived class can also inherited by another class, means when a derived class again will be inherited by another class then it create multiple levels of class.

iii.                Multiple inheritance:

In this, a class inherits the features of two or more base classes.

iv.               Hierarchical Inheritance:

In this, a base class has two or more sub classes or when a base class is used or inherited by many sub classes, it is called hierarchical inheritance.

v.                 Hybrid Inheritance:

In this type, it is a mixture of two or more inheritance. A code may contain two or three types of inheritance in a single call.

	Derived Class OR Inheritance type
Base Class		Public	Protected	Private
	Public	Public	Protected	Not Inherit
	Protected	Protected	Protected	Not Inherit
	Private	Private	Private	Not Inherit

class college

{

            protected:

                        char clg_name[10];

            public:

                        void clg_getvalue()

                        {

                                    cout<<”value of college”;

                                    cin>>clg_name;

                        }

};

class dept:public college

{

            private:

                        char dept_name[10];

            public:

                        void dept_getvalue()

                        {

                                    cout<<”value of dept”;

                                    cin>>dept_name;

                        }

                        void display()

                        {

                                    cout<<”College name ”<<clg_name;

                                    cout<<”Department name ”<<dept_name;

                        }

};

void main()

{

            dept obj;

            clrscr();

            obj.clg_getvalue();

            obj.dept_getvalue();

            obj.display();

            getch();

}