c++ record- 11)C++ Run time Polymorphism Example: By using two derived class note:- 2nd year b.com 3sem record

 

1. #include <iostream>    
2. using namespace std;    
3. class Shape {                                        //  base class  
4.     public:    
5. virtual void draw(){                             // virtual function  
6. cout<<"drawing..."<<endl;      
7.     }        
8. };     
9. class Rectangle: public Shape                  //  inheriting Shape class.  
10. {      
11.  public:    
12.  void draw()      
13.    {      
14.        cout<<"drawing rectangle..."<<endl;      
15.     }      
16. };    
17. class Circle: public Shape                        //  inheriting Shape class.  
18.   
19. {      
20.  public:    
21.  void draw()      
22.    {      
23.       cout<<"drawing circle..."<<endl;      
24.    }      
25. };    
26. int main(void) {    
27.     Shape *s;                               //  base class pointer.  
28.     Shape sh;                               // base class object.  
29.        Rectangle rec;    
30.         Circle cir;    
31.       s=&sh;    
32.      s->draw();     
33.         s=&rec;    
34.      s->draw();      
35.     s=?    
36.     s->draw();     
37. }