手机功能的升级

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。

#include <iostream>

using namespace std;

class Phone

{

public:

virtual void receiveCall() {};

};

class SimplePhone :public Phone

{

public:

virtual void receiveCall() {

        cout << "发出声音!" << endl;

}

};

class PhoneDecorator :public Phone {

protected:

Phone* phone;

public:

PhoneDecorator(Phone* p)

{

        phone = p;

}

virtual void receiveCall()

{

        phone->receiveCall();

}

};

class JarPhone :public PhoneDecorator {

public:

JarPhone(Phone* p) :PhoneDecorator(p) {}

void receiveCall()

{

        phone->receiveCall();

        cout << "会震动！" << endl;

}

};

class ComplexPhone :public PhoneDecorator {

public:

ComplexPhone(Phone* p) :PhoneDecorator(p) {}

void receiveCall()

{

        phone->receiveCall();

        cout << "会发光！" << endl;

}

};

int main()

{

Phone* p1 = new SimplePhone();

p1->receiveCall();

cout << "Jarphone" << endl;

Phone* p2 = new JarPhone(p1);

p2->receiveCall();

cout << "ComplexPhone" << endl;

Phone* p3 = new ComplexPhone(p2);

p3->receiveCall();

return 0;

}