C++-装饰模式

#include <iostream>
#include <string>
using namespace std;

class Component
{
public:
 virtual void Operation(){}
};

class ConCreateDecoratorA : public Component
{
private:
 Component* m_pComponent;
 void DASpecialDecortor()
 {
  cout<<"this is decoratrorA"<<endl;
 }
public:
 ConCreateDecoratorA(Component* pComponent)
 {
  m_pComponent=pComponent;
 }
 void Operation()
 {  
  m_pComponent->Operation();
  DASpecialDecortor();
 }
};


class ConCreateDecoratorB: public Component
{
private:
 Component* m_pComponent;
 void DBSpecialDecortor()
 {
  cout<<"this is decoratrorB"<<endl;
 }
public:
 ConCreateDecoratorB(Component* pComponent)
 {
  m_pComponent=pComponent;
 }
 void Operation()
 {  
  m_pComponent->Operation();
  DBSpecialDecortor();
 }
};

void main()
{
 Component* p=new Component;
 ConCreateDecoratorA* pDa=new ConCreateDecoratorA(p);
 ConCreateDecoratorB* pDb=new ConCreateDecoratorB(pDa);
 pDb->Operation();

}