Write a C++ program to illustrate runtime polumorphism.

AIM: Write a C++ program to illustrate runtime polumorphism.

THEORY:

The word polymorphism means having many forms. In simple words, we can define polymorphism as the ability of a message to be displayed in more than one form.
Real life example of polymorphism, a person at a same time can have different characteristic. Like a man at a same time is a father, a husband, a employee. So a same person posses have different behavior in different situations. This is called polymorphism.
Polymorphism is considered as one of the important features of Object Oriented Programming.
In C++ polymorphism is mainly divided into two types:

§  Compile time Polymorphism

§  Runtime Polymorphism

SOURCE CODE:

#include<iostream>

using namespace std;

float add(float m,float n)

{

            return m+n;

}

float sub(float m,float n)

{

            return m-n;

}

float mul(float m,float n)

{

            return m*n;

}

int main()

{

            float x,y;

            cout<<"\ enter two numbers:";

            cin>>x>>y;

            int task;

            do

            {

                        int task;

                        cout<<"enter task(1=add,2=sub,3=mul,4=exit)";

                        cin>>task;

                        float(*pt)(float,float);

                        switch(task)

                        {

                                    case 1:

                                    pt=add;

                                    break;

                                    case 2:

                                    pt=sub;

                                    break;

                                    case 3:

                                    pt=mul;

                                    break;

                                    case 4:

                                    exit(0);

                                    break;

                        }

                        cout<<"result of operation is:"<<pt(x,y)<<endl;

            }while(task>=1||task<=4);

            return 0;

}