Write a C++ program to incorporate Heirarchial Inheritance.

AIM: Write a C++ program to incorporate Heirarchial Inheritance.

THEORY:

 In Object Oriented Programming, the root meaning of inheritance is to establish a relationship between objects. In Inheritance, classes can inherit behaviour and attributes from pre-existing classes, called Base Classes or Parent Classes. The resulting classes are known as derived classes or child classes. 

So in Hierarchical Inheritance, we have 1 Parent Class and Multiple Child Classes, as shown in the pictorial representation given on this page, Inheritance. Many programming problems can be cast into a hierarchy where certain features of one level are shared by many others below that level. One example could be classification of accounts in a commercial bank or classification of students in a university.

In C++, such problems can be easily converted into hierarchies. The base class will include all the features that are common to the subclasses. A subclass can be constructed by inheriting the properties of the base class. A subclass can serve as a base class for the lower level classes and so on.

     A derived class with hierarchical inheritance is declared as follows:

        class A {.....};            // Base class

        class B: public A {.....};             // B derived from A

        class C: public A {.....};             // C derived from A

This process can be extended to any number of levels. Let us understand this concept by a simple C++ program:

SOURCE CODE:

nclude<iostream>

using namespace std;

class A

{

            protected:

            char name[10];

            int age;

};

class B:public A

{

            public:

            int h,w;

            void get_data1()

            {

                        cout<<"\n enter name:";

                        cin>>name;

                        cout<<"\n enter weight and height:";

                        cin>>w>>h;

            }         

                        void show()

                        {

                                    cout<<name<<endl<<w<<endl<<h<<endl;

                        }

};

class C:public A

{

            public:

            char gender;

            void get_data2()

            {

                        cout<<"\n enter age:";

                        cin>>age;

                        cout<<"enter gender:";

                        cin>>gender;

                        }         

                        void show()

                        {

                                    cout<<age;

                                    cout<<gender;

                        }

 };

 int main()

 {

            B ob;

            C ob1;

            ob.get_data1();

            ob1.get_data2();

            ob.show();

            ob1.show();

 }