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//AbstractionImp.h 
#ifndef _ABSTRACTIONIMP_H_  
#define _ABSTRACTIONIMP_H_ 
 
class AbstractionImp  
{ 
 public:  
	virtual ~AbstractionImp(); 
	virtual void Operation() = 0; 
protected:  
	AbstractionImp(); 
private: 
 
}; 
 
class ConcreteAbstractionImpA:public AbstractionImp  
{  
public:  
	ConcreteAbstractionImpA(); 
	~ConcreteAbstractionImpA(); 
	virtual void Operation(); 
protected:  
private: 
}; 
 
class ConcreteAbstractionImpB:public AbstractionImp  
{  
public: 
	ConcreteAbstractionImpB(); 
	~ConcreteAbstractionImpB(); 
	virtual void Operation(); 
protected:  
private: 
}; 
 
#endif