C++ PROGRAM: implement the following class hierarchy and implement the methods to input dimensions of shape and also calculate area of each shape.

SOLUTION:

#include<iostream.h>

#include<conio.h>

#include<math.h>

class shape

{

public:

int a;

};

class two_dimensional:public shape

{

public:

int d1,d2;

};

class three_dimensional:public shape

{

public:

int d1,d2;

};

class triangle:public two_dimensional

{

public:

void area()

{

cout<<"\n\nEnter the Triangle dimensions (Base,Vertical Height):";

cin>>d1>>d2;

a=0.5*(d1*d2);

cout<<"The area of Triangle is="<<a;

}

};

class rectangle:public two_dimensional

{

public:

void area()

{

cout<<"\n\n Enter the Rectangle dimenssions (Width,Height):";

cin>>d1>>d2;

a=d1*d2;

cout<<"The area of Rectangle is="<<a;

}

};

class box:public three_dimensional

{

public:

void area()

{

cout<<"\n\nEnter the Box dimenssion of any side:";

cin>>d1;

a=d1*d1*d1;

cout<<"The area of Box is="<<a;

}

};

class cone:public three_dimensional

{

public:

void area()

{

cout<<"\n\nEnter the dimenssions of Cone (Radius,Height):";

cin>>d1>>d2;

a=M_PI*d1*(d1+sqrt(d1*d1+d2*d2));

cout<<"The area of the Cone is="<<a;

}

};

class sphere:public three_dimensional

{

public:

void area()

{

cout<<"\n\nEnter the dimensssion of Sphere (Radius):";

cin>>d1;

a=4*M_PI*d1*d1;

cout<<"The area of Sphere is="<<a;

}

};

void main()

{

int ch;

triangle t;

rectangle r;

box b;

cone c;

sphere s;

clrscr();

cout<<"Press:\n1.Area of Triangle\n2.Area of Rectangle\n3.Area of Box\n4.Area of Cone\n5.Area of Sphere";

cout<<"\n\nEnter your choice:";

cin>>ch;

switch (ch)

{

case 1:

t.area();

break;

case 2:

r.area();

break;

case 3:

b.area();

break;

case 4:

c.area();

break;

case 5:

s.area();

break;

default:

cout<<"\nYou didnot enter the correct choice.";

break;

}

getch();

}

OUTPUT: