设计模式解析与实现(C++)之Factory模式

以下是一个具体的例子，很直观
定义一个抽象产品 手机类

class Phone
{
public :
virtual void call()=0;//打电话
virtual void music()=0;//音乐
virtual void internet()=0;//上网
};

实现产品类1：实现一个iphone
class iPhone:public Phone
{
public:
void call()
{
std::cout<<"用iphone打电话"<<std::endl;
}
void music()
{
std::cout<<"用iphone听音乐"<<std::endl;
}
void internet()
{
std::cout<<"用iphone上网"<<std::endl;
}
};

实现产品类2：Android手机
class AndroidPhone:public Phone
{
public:
void call()
{
std::cout<<"用Android手机打电话"<<std::endl;
}
void music()
{
std::cout<<"用Android手机听音乐"<<std::endl;
}
void internet()
{
std::cout<<"用Android手机上网"<<std::endl;
}
};

抽象一个工厂（富士康、华为是代工厂）
class AbstractFactory
{
public:
virtual Phone * createPhone()=0;
};

实现抽象类 富士康工厂，生产iPhone

class Foxconn:public AbstractFactory
{
public:
Phone * createPhone()
{
return new iPhone;
}
};
实现抽象类 华为工厂，生产AndroidPhone

class Huawei:public AbstractFactory
{
public:
Phone * createPhone()
{
return new AndroidPhone;
}
};

以下是此问题的源代码(C++)：

Factory.h

#ifndef _FACTORY_H#define _FACTORY_H#include<iostream>class Phone//抽象产品类 手机{public :virtual void call()=0;//打电话    均定义为纯虚函数，或者定义为虚函数加上实现virtual void music()=0;//听音乐virtual void internet()=0;//上网};class iPhone:public Phone//实现iPhone类{public:void call(){std::cout<<"用iphone打电话"<<std::endl;}void music(){std::cout<<"用iphone听音乐"<<std::endl;}void internet(){std::cout<<"用iphone上网"<<std::endl;}};class AndroidPhone:public Phone//实现AndroidPhone类{public:void call(){std::cout<<"用Android手机打电话"<<std::endl;}void music(){std::cout<<"用Android手机听音乐"<<std::endl;}void internet(){std::cout<<"用Android手机上网"<<std::endl;}};class AbstractFactory//抽象工厂类 手机生产代工厂{public:virtual Phone * createPhone()=0;//Phone类型的指针函数};class Foxconn:public AbstractFactory//实现Foxconn类，生产iPhone{public:Phone * createPhone(){return new iPhone;}};class Huawei:public AbstractFactory//实现Huawei类，生产AndroidPhone{public:Phone * createPhone(){return new AndroidPhone;}};#endif

Factory.cpp

#include "Factory.h"int _tmain(int argc, _TCHAR* argv[]){AbstractFactory *foxconn=new Foxconn();Phone * iphone=foxconn->createPhone();iphone->call();iphone->music();iphone->internet();AbstractFactory *huawei=new Huawei();Phone * androidphone=huawei->createPhone();androidphone->call();androidphone->music();androidphone->internet();return 0;}

运行结果如下：