#include "stdafx.h"#include <iostream>using namespace std;class InterfaceA{public:        InterfaceA();        virtual ~InterfaceA();        virtual void Func1() = 0;        virtual void Func2() = 0; };InterfaceA::InterfaceA(){}InterfaceA::~InterfaceA(){}class ComponetB : public InterfaceA{public:        ComponetB();        virtual ~ComponetB();        virtual void Func1();        virtual void Func2(); };ComponetB::ComponetB(){cout<<"组件B创建"<<endl;}ComponetB::~ComponetB(){cout<<"组件B析构"<<endl;}void ComponetB::Func1(){cout<<"CompoentB::Func1 is called \n";}void ComponetB::Func2(){cout<<"ComponetB::Func2 is called \n";} class ComponetC : public InterfaceA{public:        ComponetC();        virtual ~ComponetC();        virtual void Func1();        virtual void Func2();};ComponetC::ComponetC(){cout<<"组件C创建"<<endl;}ComponetC::~ComponetC(){cout<<"组件C析构"<<endl;}void ComponetC::Func1(){cout<<"ComponentC::Fucn1 is called \n";}void ComponetC::Func2(){cout<<"ComponetC::Func2 is called \n";}class IFactory{public:        IFactory();        virtual ~IFactory();        virtual InterfaceA* CreateInstance() = 0;       protected:        InterfaceA* m_ptrIA;};IFactory::IFactory() : m_ptrIA(NULL){}IFactory::~IFactory(){if(NULL != m_ptrIA) delete m_ptrIA; m_ptrIA = NULL;}class FactoryB : public IFactory{public:        FactoryB();        virtual ~FactoryB();        virtual InterfaceA* CreateInstance();};FactoryB::FactoryB() : IFactory(){}FactoryB::~FactoryB(){if(NULL != m_ptrIA) delete m_ptrIA; m_ptrIA = NULL;}InterfaceA* FactoryB::CreateInstance(){return (m_ptrIA = new ComponetB());}class FactoryC : public IFactory{public:        FactoryC();        virtual ~FactoryC();        virtual InterfaceA* CreateInstance();};FactoryC::FactoryC() : IFactory(){}FactoryC::~FactoryC() {if(NULL != m_ptrIA) delete m_ptrIA; m_ptrIA = NULL;}InterfaceA* FactoryC::CreateInstance(){return (m_ptrIA = new ComponetC());} int _tmain(int argc, _TCHAR* argv[]){        IFactory* pFactory = new FactoryB();        InterfaceA* pInterface = pFactory->CreateInstance();        pInterface->Func1();        cout<<endl;        pInterface->Func2();        cout<<endl<<endl;        delete pFactory;        pFactory = new FactoryC();        pInterface = pFactory->CreateInstance();        pInterface->Func1();        cout<<endl;        pInterface->Func2();        delete pFactory;        return 0;}