桥接模式

桥接模式的主要思想是通过组合来代替继承，从未避免类继承的过分膨胀。

将抽象部分与它的实现部分分离，使他们可以独立地变化。

 

 

C++代码：

class AbstractionImp
{
public:
	virtual ~AbstractionImp(){}
	virtual void Operation() = 0;
};

class ConcreteAbstractionImpA : public AbstractionImp
{
public:
	virtual void Operation(){cout<<"impA"<<endl;}
};

class ConcreteAbstractionImpB : public AbstractionImp
{
public:
	virtual void Operation(){cout<<"impB"<<endl;}
};

class Abstraction
{
public:
	virtual void Operator() = 0;
	virtual ~Abstraction(){}
};

class RefinedAbstraction : public Abstraction
{
public:
	RefinedAbstraction(AbstractionImp* imp)
		:m_imp(imp){}
	void Operator(){m_imp->Operation();}
private:
	AbstractionImp* m_imp;
};

int _tmain(int argc, _TCHAR* argv[])
{
	AbstractionImp* impA = new ConcreteAbstractionImpA;

	Abstraction* abs = new RefinedAbstraction(impA);
	abs->Operator();

	delete impA;
	delete abs;
	
	system("pause");
	return 0;
}