下面以女娲造黑人，白人，黄种人的例子来介绍一下工厂模式。
1.工厂的接口，相当于造人工厂总部。
class IHumanFactory
{
public:
IHumanFactory(void)
{
}
~IHumanFactory(void)
{
}
virtual IHuman* CreateHuman() = 0;
};2.造人各个的部门
class WhiteHumanFactory: public IHumanFactory
{
public:
WhiteHumanFactory(void)
{
}
~WhiteHumanFactory(void)
{
}
IHuman *CreateHuman()
{
return new WhiteHuman();
}
};
class YellowHumanFactory: public IHumanFactory
{
public:
YellowHumanFactory(void)
{
}
~YellowHumanFactory(void)
{
}
IHuman *CreateHuman()
{
return new YellowHuman();
}
};
class BlackHumanFactory: public IHumanFactory
{
public:
BlackHumanFactory(void)
{
}
~BlackHumanFactory(void)
{
}
IHuman *CreateHuman()
{
return new BlackHuman();
}
};3.各种人的特征。
class IHuman
{
public:
IHuman(void)
{
}
~IHuman()
{
}
virtual void Laugh() = 0;
virtual void Cry() = 0;
virtual void Talk() = 0;
};
class WhiteHuman : public IHuman
{
public:
WhiteHuman(void)
{
}
~WhiteHuman(void)
{
}
void Laugh()
{
std::cout << "白种人笑！" << std::endl;
}
void Cry()
{
std::cout << "白种人哭！" <<std::endl;
}
void Talk()
{
std::cout << "白种人说话！" <<std::endl;
}
};
class YellowHuman : public IHuman
{
public:
YellowHuman(void)
{
}
~YellowHuman(void)
{
}
void Laugh()
{
std::cout << "黄种人笑！" << std::endl;
}
void Cry()
{
std::cout << "黄种人哭！" <<std::endl;
}
void Talk()
{
std::cout << "黄种人说话！" <<std::endl;
}
};
class BlackHuman : public IHuman
{
public:
BlackHuman(void)
{
}
~BlackHuman(void)
{
}
void Laugh()
{
std::cout << "黑种人笑！" << std::endl;
}
void Cry()
{
std::cout << "黑种人哭！" <<std::endl;
}
void Talk()
{
std::cout << "黑种人说话！" <<std::endl;
}
};4.主函数
int main()
{
std::cout << "#1.制造黄种人"<<std::endl;
IHumanFactory *pHumanFactory = new YellowHumanFactory();
IHuman * pHuman = pHumanFactory->CreateHuman();
pHuman->Cry();
pHuman->Laugh();
pHuman->Talk();
delete pHuman;
delete pHumanFactory;
std::cout << "#1.制造白种人"<<std::endl;
IHumanFactory *pHumanFactory2 = new WhiteHumanFactory();
IHuman * pHuman2 = pHumanFactory->CreateHuman();
pHuman->Cry();
pHuman->Laugh();
pHuman->Talk();
delete pHuman2;
delete pHumanFactory2;
std::cout << "#1.制造黑种人"<<std::endl;
IHumanFactory *pHumanFactory3 = new BlackHumanFactory();
IHuman * pHuman3 = pHumanFactory->CreateHuman();
pHuman->Cry();
pHuman->Laugh();
pHuman->Talk();
delete pHuman3;
delete pHumanFactory3;
getchar();
return 0;
}输出结果：
#1.制造黄种人 黄种人哭！ 黄种人笑！ 黄种人说话！ #1.制造白种人 白种人哭！ 白种人笑！ 白种人说话！ #1.制造黑种人 黑种人哭！ 黑种人笑！ 黑种人说话