初学设计模式之装饰者模式

 

装饰者模式的代码例子

#include<iostream>
using namespace std;
class SelfAbstract
{
public:
    virtual void exec(){};
};

class Self:public SelfAbstract
{
public:
    void exec()
    {
        cout<<"被装饰的本体"<<endl;
    };
};

class Decrator:public SelfAbstract
{
private:
    SelfAbstract *m_selfAbstract;
public:
    Decrator(SelfAbstract *selfAbstract)
    {
    m_selfAbstract=selfAbstract;
    };
    void exec()
    {
        m_selfAbstract->exec();
    };
};

class Decrator1:public SelfAbstract
{
private:
    SelfAbstract *m_selfAbstract;
public:
    Decrator1(SelfAbstract *selfAbstract)
    {
    m_selfAbstract=selfAbstract;
    };
    void exec()
    {  
        m_selfAbstract->exec();
         cout<<"第一次装饰"<<endl;
    };
};

class Decrator2:public SelfAbstract
{
private:
    SelfAbstract *m_selfAbstract;
public:
    Decrator2(SelfAbstract *selfAbstract)
    {
    m_selfAbstract=selfAbstract;
    };
    void exec()
    {   
        m_selfAbstract->exec();
        cout<<"第二次装饰"<<endl;
    };
};

int main()
{    Self m_Self;
     Decrator m_Decrator(&m_Self);
     Decrator1 m_Decrator1(&m_Decrator);
     Decrator2 m_Decrator2(&m_Decrator1);
     m_Decrator2.exec();

     getchar();
     return 0;
};