VIRTUAL FUNCTION #include #include class shape { protected: double x,y,z; public: void get_area(double x1,double y1,double z1) { x=x1; y=y1; z=z1; } virtual void disp()=0; }; class rect:public shape { void disp() { cout<<"area of rectangle="<< x*y <<"\n"; cout<<"\n"; } }; class tria:public shape { void disp() { cout<<"area of triangle="<<(x*y)/2<<"\n"; cout<<"\n"; } }; class cir:public shape { void disp() { cout<<"area of circle="<<(3.14*y*y)<<"\n"; cout<<"\n"; } }; int main() { float x,y,z; clrscr(); cout<<"enter the value of x,y,z\n"; cin>>x>>y>>z; shape *p; rect r; p=&r; p->get_area(x,y,z); p->disp(); tria t; p=&t; p->get_area(x,y,z); p->disp(); cir c; p=&c; p->get_area(x,y,z); p->disp(); getch(); return 0; }