工厂模式实现

#include <iostream>using namespace std;class CLeiFeng{public:virtual ~CLeiFeng(){}virtual void cook(){}virtual void clean(){}virtual void laundry(){}};class CHelperA:public CLeiFeng{public:void cook(){cout<<"Helper cook"<<endl;}void clean(){cout<<"Helper clean"<<endl;}void laundry(){cout<<"Helper laundry"<<endl;}};class CHelperB:public CLeiFeng{public:void cook(){cout<<"HelperB cook"<<endl;}void clean(){cout<<"HelperB clean"<<endl;}void laundry(){cout<<"HelperB laundry"<<endl;}};class IFactory{public:virtual ~IFactory(){}virtual CLeiFeng *GetFactory(){return NULL;}};class CHelperAFactory:public IFactory{public:CLeiFeng *GetFactory(){return new CHelperA;}};class CHelperBFactory:public IFactory{public:CLeiFeng *GetFactory(){return new CHelperB;}};int main(){IFactory *factory = new CHelperBFactory();factory->GetFactory()->cook();return 0;}

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打印结果：

HelperB cook