//5.工厂模式
//ver1
//回顾简单工厂模式
class OperationFactory
{
public:static Operation createOperation(char chOper){Operation * op = NULL;switch(chOper){case '+':op = new OperationAdd();break;case '-':op = new OperationSub();break;default:break;}return *op;}
};void main11()
{Operation oper;oper = OperationFactory::createOperation('+');oper.SetNumberA(1.1);oper.SetNumberB(2.2);double result = oper.GetResult();
}//工厂模式:
//工厂接口
class Operation
{
public:Operation(){}~Operation(){}
protected:double _NumberA;double _NumberB;
public:void SetNumberA(double A){_NumberA = A;}double GetNumberA(){return _NumberA;}void SetNumberB(double B){_NumberB = B;}double GetNumberB(){return _NumberB;}virtual double GetResult(){double result = 0;return result;}
};class OperationAdd : public Operation
{
public:virtual double GetResult(){double result = _NumberA + _NumberB;return result;}
};class OperationSub : public Operation
{
public:virtual double GetResult(){double result = _NumberA - _NumberB;return result;}
};class IFactory
{
public:virtual Operation CreateOperation(){Operation * po = NULL;return *po;}
};class AddFactory : public IFactory
{
public:virtual Operation CreateOperation(){Operation * po = new OperationAdd();return *po;}
};class SubFactory : public IFactory
{
public:virtual Operation CreateOperation(){Operation * po = new OperationSub();return *po;}
};void main1()
{IFactory * pif = new AddFactory();Operation po = pif->CreateOperation();po.SetNumberA(1.1);po.SetNumberB(2.2);double result = po.GetResult();
}

//5.工厂模式
//ver2
class LeiFeng
{
public:void Sweep(){//打扫}void Wash(){//洗衣}
};//学习雷锋大学生
class Undergraduate : public LeiFeng
{};//志愿者
class Volunteer : public LeiFeng
{};//简单雷锋工厂
class SimpleFactory
{
public:static LeiFeng CreateLeiFeng(char cType){LeiFeng * plf = NULL;switch (cType){case '1': //大学生plf = new Undergraduate();break;case '2': //志愿者plf = new Volunteer();break;default:break;}return *plf;}
};void main21()
{LeiFeng stuA = SimpleFactory::CreateLeiFeng('1');stuA.Sweep();LeiFeng volA = SimpleFactory::CreateLeiFeng('2');volA.Wash();
}//雷锋工厂
class IFactory
{
public://IFactory(){}LeiFeng CreateLeiFeng(){LeiFeng * plf = new LeiFeng();return *plf;}
};//大学生工厂
class UndergraduateFactory : public IFactory
{
public://UndergraduateFactory(){}LeiFeng CreateLeiFeng(){LeiFeng *plf = new Undergraduate();return *plf;}
};//志愿者工厂
class VolunteerFactory : public IFactory
{
public://VolunteerFactory(){}LeiFeng CreateLeiFeng(){LeiFeng * plf = new Volunteer();return *plf;}
};void main22()
{IFactory * pf = new UndergraduateFactory();LeiFeng stu = pf->CreateLeiFeng();stu.Sweep();stu.Wash();
}