c++ 数据封装模式之二： 工厂方法模式

// FactoryMethod.cpp : Defines the entry point for the console application.   
//   
  
#include "stdafx.h"   
  
#include "ostream.h"   
  
  
//定义抽象类   
class CAnimal   
{   
protected:   
    int  m_Weigh

// FactoryMethod.cpp : Defines the entry point for the console application.   
//   
  
#include "stdafx.h"   
  
#include "ostream.h"   
  
  
//定义抽象类   
class CAnimal   
{   
protected:   
    int  m_Weight;  //重量   
public:   
    virtual void Cry() = 0;   
};   
//定义具体类   
class CFish:  public CAnimal   
{   
public:   
    virtual void Cry()   
    {   
        cout <<"I am Fish!/n";   
    }   
};   
class CBird : public CAnimal   
{   
public:   
    virtual void Cry()   
    {   
        cout <<"I am Bird! /n";   
    }   
};   
//定义工厂抽象类   
class CFactory   
{   
public:   
    virtual CAnimal* CreateObj() = 0;   
  
};   
//定义工厂具体类   
class CFactory1 : public CFactory   
{   
public:   
    virtual CAnimal* CreateObj()   
    {   
        return new CBird();   
    }   
};   
class CFactory2: public CFactory   
{   
public:   
    virtual CAnimal* CreateObj()   
    {   
        return new CFish();   
    }   
};   
  
int main(int argc, char* argv[])   
{   
  
    CAnimal* pAnimal1,*pAnimal2;   
    CFactory * pFactory1,*pFactory2;   
    pFactory1 = new CFactory1();   
    pAnimal1 = pFactory1->CreateObj();   
    pAnimal1->Cry();   
  
    pFactory2 = new CFactory2();   
    pAnimal2 = pFactory2->CreateObj();   
    pAnimal2->Cry();   
  
    delete pAnimal1;   
    delete pAnimal2;   
    delete pFactory1;   
    delete pFactory2;   
  
    return 0;   
}