装饰模式——C++实现

问题描述：

用装饰模式模拟手机功能的升级过程：简单的手机(SimplePhone)在接收来电时，会发出声音提醒主人；而JarPhone除了声音还能振动；更高级的手机(ComplexPhone)除了声音、振动外，还有灯光闪烁提示。

类图：

 

 代码：

#include <iostream>
#include <string>
#include <list>
using namespace std;
//抽象构建——Phone类
class Phone
{
public:
    Phone() {}
    virtual ~Phone() {}
    virtual void call() {}
};
//具体构建——SimplePhone
class SimplePhone : public Phone
{
private:
    string name;
public:
    SimplePhone(string name) : name(name) {}
    ~SimplePhone() {}
    void call() {
        cout <<"--------------" <<name << "------------------" << endl;
        cout<<"响铃：主人来电话啦！"<<endl;
    }
};
//抽象装饰类——UpgradePhone
class UpgradePhone : public Phone
{
private:
    Phone* phone;
public:
    UpgradePhone(Phone* phone) : phone(phone) {}
    virtual void call() {
        phone->call();
    }
};
//具体装饰类——JarPhone
class JarPhone : public UpgradePhone
{
public:
    JarPhone(Phone* phone) : UpgradePhone(phone) {}
    void call() {
        UpgradePhone::call();
        shoke();
    }
private:
    void shoke() {
        cout << "振动：嗡嗡嗡" << endl;
    }
};
//具体装饰类—— ComplexPhone
class ComplexPhone : public UpgradePhone
{
public:
    ComplexPhone(Phone* phone) : UpgradePhone(phone) {}
    void call() {
        UpgradePhone::call();
        light();
    }
private:
    void light() {
        cout << "闪光：咔嚓" << endl;
    }
};
 
int main()
{
    Phone* phone = new SimplePhone("SimplePhone");
    phone->call();
 
    Phone* jphone = new SimplePhone("JarPhone");
    Phone* ph1 = new JarPhone(jphone);
    ph1->call();
 
    Phone* cphone = new SimplePhone("ComplexPhone");
    Phone* ph2 = new JarPhone(cphone);
    Phone* ph3 = new ComplexPhone(ph2);
    ph3->call();
 
    delete phone;
    delete jphone;
    delete ph1;
    delete ph2;
    delete ph3;
    delete cphone;
}　

　　运行截图：