求索阁

#include <iostream>
using namespace std;

struct ISingleCore
{
public:
    virtual ~ISingleCore() { }

    virtual void Produce() = 0;
};

class CSingleCoreA : public ISingleCore
{
public:
    virtual ~CSingleCoreA() { }

    virtual void Produce() { cout<<"Single Core A"<<endl; }
};

class CSingleCoreB : public ISingleCore
{
public:
    virtual ~CSingleCoreB() { }

    virtual void Produce() { cout<<"Single Core B"<<endl; }
};

struct IFactory
{
public:
    virtual ~IFactory() { }

    virtual ISingleCore* CreateSingleCore() = 0;
};

class CFactoryA : public IFactory
{
public:
    virtual ~CFactoryA() { }

    virtual ISingleCore* CreateSingleCore() { return new CSingleCoreA(); }
};

class CFactoryB : public IFactory
{
public:
    virtual ~CFactoryB() { }

    virtual ISingleCore* CreateSingleCore() { return new CSingleCoreB(); }
};

void main()
{
    //
    CFactoryA factoryA;

    ISingleCore *pSingleCoreA = factoryA.CreateSingleCore();
    pSingleCoreA->Produce();
    delete pSingleCoreA;

    //
    CFactoryB factoryB;

    ISingleCore *pSingleCoreB = factoryB.CreateSingleCore();
    pSingleCoreB->Produce();
    delete pSingleCoreB;
}