Write a program in C++ to create a base class shape and derive two classes named Circle and Square from it. Create and initialize objects from these classes using appropriate constructors.

 #include<iostream>

#include<string.h>

using namespace std;

class Shape

{

public:

double radius;

double side;

//constructor to assign initial values to side and circle;

Shape()

{

side=0;;

radius-=0;

}

void get_data()

{

cout<<"\nEnter side of square to compute area  :";

cin>>side;

cout<<"\nEnter radius of circle to compute area  :";

cin>>radius;

}

virtual void display_area()

{

}

};

class Square: public Shape

{

public:

void display_area()

{

cout<<side;

cout<<"\nArea of Square = "<<(side*side);

}

};

class Circle : public Shape

{

public:

void display_area()

{

cout<<"\nArea of Circle= "<<(3.14*radius*radius);

}

};

int  main()

{

Shape *s;

Square t;

t.get_data();

s=&t;

s->display_area();

Circle r;

r.get_data();

s=&r;

s->display_area();

return 0;

}