Polymorphism and Virtual Function in C++ – Shape Example

Create Class Shape. Derived the class Triangle and class Rectangle. Create a draw function in each class. Demonstrate polymorphism by accessing draw function using pointers of Shape class.

#include <iostream.h>
#include <conio.h>

class Shape
{
 public:
 void virtual draw()
 {
 cout<<"I am shape"<<endl;
 }
};

class Triangle : public Shape
{
 public:
 void draw()
 {
 cout<<"I am Traingle"<<endl;
 }
};

class Rectangle: public Shape
{
 public:
 void draw()
 {
 cout<<"I am Rectangle"<<endl; 
} 
}; 

void main() 
{ 
clrscr(); 
Shape *ps; 
Triangle t; 
Rectangle r; 
ps=&t; 
ps->draw();
 ps=&r;
 ps->draw();
 getch();
}