Virtual function and two subclasses : virtual function « Class « C++

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C++ » Class » virtual functionScreenshots 
Virtual function and two subclasses
  
#include <iostream>  
using namespace std;

class Base {  
public:  
  virtual void who(void) {  
    cout << "Base\n";  
  }  
};  
     
class first_d : public Base {  
public:  
  void who(void) {  
    cout << "First derivation\n";  
  }  
};  
     
class second_d : public Base {  
// who() not defined  
};  
     
main(void)  
{  
  Base base_obj;  
  Base *p;  
  first_d first_obj;  
  second_d second_obj;  
     
  p = &base_obj;  
  p->who()
     
  p = &first_obj;  
  p->who();   
     
  p = &second_obj;  
  p->who();  
     
  return 0;  
}
  
    
  
Related examples in the same category
1.virtual function from base and derived classes
2.Abstract classes by virtual function with no body
3.Override non-virtual function
4.Implementing Pure Virtual Functions
5.Illustration of the Use of Virtual Inheritance
6.Using Virtual Methods
7.Multiple Virtual Functions Called in Turn
8.Virtual Copy Constructor
9.virtual functions accessed from pointer
10.virtual functions with person class
11.Call parent virtual function
12.Using Virtual Functions to control the behaviour
13.Pure Virtual Functions as a prototype
14.Virtual Functions Are Hierarchical
15.Virtual function in three level inheritance
16.The Virtual Attribute Is Inherited
17.Virtual Functions and Polymorphism
18.A base class reference is used to access a virtual function
19.Virtual base classes.
20.virtual members
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