设计模式--装饰器模式

   装饰器模式：通过使用修饰模式，可以在运行时扩充一个类的功能。
  

直接上代码：

class person
{
public:
    person(){}
    virtual ~person(){}
    virtual void wear() = 0;
};

class japanPerson : public person{
public:
    japanPerson() :person()
    {

    }
    ~japanPerson()
    {

    }
    void wear()
    {
        printf("japan wear japan cloth\n");
    }
};

class personDecorate : public person
{
public:
    personDecorate(person* tmpPerson) :person()
    {
        m_pPerson = tmpPerson;
    }
    virtual ~personDecorate()
    {

    }
    void wear()
    {
        m_pPerson->wear();
    }
private:
    person *m_pPerson;
};

class wearCHNShoesJapanese : public personDecorate
{
public:
    wearCHNShoesJapanese(person* tmp) :personDecorate(tmp)
    {

    }
    ~wearCHNShoesJapanese()
    {

    }
    void wear()
    {
        personDecorate::wear();
        cjwearHat();
    }
    void cjwearHat()
    {
        printf("japanese wear shoes\n");
    }
};

class wearCHNHatJapanese : public personDecorate
{
public:
    wearCHNHatJapanese(person* tmp) :personDecorate(tmp)
    {

    }
    ~wearCHNHatJapanese()
    {

    }
    void wear()
    {
        personDecorate::wear();
        cjwearHat();
    }
    void cjwearHat()
    {
        printf("japanese wear hat\n");
    }
};

   

int main()
{
        person *jp = new japanPerson();
    jp->wear();
    jp = new wearCHNShoesJapanese(jp);
    jp->wear();
    jp = new wearCHNHatJapanese(jp);
    jp->wear();

}

从上面的代码可以看出我可以给日本人先穿衣服，然后在让他穿鞋，还可以继续扩展他，真是方便!