26.8.15

Create a base class called 'SHAPE'

 Create a base class called 'SHAPE' having

-          two data members of type double

-          member function get-data( ) to initialize base class data members

-          pure virtual member function display-area( ) to compute and display the area of

the geometrical object.

Derive two specific classes 'TRIANGLE' and 'RECTANGLE' from the base class. Using these three classes design a program that will accept dimension of a triangle / rectangle interactively and display the area.

#include<iostream.h>

#include<conio.h> class shape

{
protected:double x, y;
public:void getdata(double a, double b)
{
x=a;
y=b;
}
virtual void display_area()=0;
};
class triangle:public shape
{

double triangle_area; void display_area()
{

triangle_area=(1*x*y)/2;
cout<<"area of triangle is:"<<triangle_area<<endl;
}
};
class rectangle:public shape
{
double rectangle_area; void display_area()

{
rectangle_area=x*y;
cout<<"area of rectangle is:"<<rectangle_area;
}
};
int main()
{


clrscr(); shape *p; triangle t; rectangle r;

p=&t; p->getdata(10,30); p->display_area(); p=&r; p->getdata(20,30); p->display_area(); getch();

return 0;
}

*******************************OUTPUT*******************************

area of triangle is:150 area of rectangle is:600


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