设计模式的工厂模式一共有三种：简单工厂模式，工厂模式，抽象工厂模式

简单工厂模式原理：只有一个工厂类，通过传参的形式确定所创建的产品对象种类

代码如下：

#include 
     
      #include 
      
       #include 
       
        using namespace std;#define COREA 0#define COREB 1class Core{public:	virtual void show(){}};class CoreA:public Core{public:	virtual void show()	{		cout << "This is corea" <
        
         create(0);	pcore->show();	return 0;}
        
       
      
     

工厂方法模式原理：通过在客户调用不同的工厂类来实现同一类对象的创建。

produce.h代码

#ifndef PRODUCE_H#define PRODUCE_H#include 
     
      using namespace std;class Core{public:	virtual void show(){}};class CoreA:public Core{public:	virtual void show()	{		cout << "This is corea" <
     

 factory.h代码

#ifndef FACOTRY_H#define FACOTRY_H#include 
     
      #include "produce.h"using namespace std;class Factory{public:	virtual Core* create();	};class FactoryCoreA:public Factory{	virtual Core* create();};class FactoryCoreB:public Factory{	virtual Core* create();};#endif
     

 factory.cpp代码

#include 
     
      #include "factory.h"using namespace std;Core* Factory::create(){	return NULL;}Core* FactoryCoreA::create(){	return new CoreA();}Core* FactoryCoreB::create(){	return new CoreB();}
     

 客户main.cpp代码

#include 
     
      #include 
      
       #include 
       
        #include "factory.h"#include "produce.h"using namespace std;#define COREA 0#define COREB 1int main(){	Factory * fa = new FactoryCoreA();	Core* pcore = fa->create();	pcore->show();	return 0;}
       
      
     

 抽象工厂原理：抽象工厂可以创建一系列的产品，缺点如果是增加产品种类，需要重新修改抽象工厂接口和实现

部分代码如下

factory.cpp

#include 
     
      #include "factory.h"#include "Board.h"using namespace std;Core* Factory::createcore(){	return NULL;}Core* FactorySeriaA::createcore(){	return new CoreA();}Core* FactorySeriaB::createcore(){	return new CoreB();}Board* Factory::createboard(){	return NULL;}Board* FactorySeriaA::createboard(){	return new BoardA();}Board* FactorySeriaB::createboard(){	return new BoardB();}
     

 fatory.h

#ifndef FACOTRY_H#define FACOTRY_H#include 
     
      #include "produce.h"#include "Board.h"using namespace std;class Factory{public:	virtual Core* createcore();	virtual Board* createboard();	};class FactorySeriaA:public Factory{	virtual Core* createcore();	virtual Board* createboard();};class FactorySeriaB:public Factory{	virtual Core* createcore();	virtual Board* createboard();};#endif
     

 新增的产品种类类Board.h

#ifndef BOARD_H#define BOARD_H#include 
     
      using namespace std;class Board{public:	virtual void show(){}};class BoardA:public Board{public:	virtual void show()	{		cout << "This is boarda" <