設計模式之橋接模式C++簡單實現

橋模式，其作用就是讓抽象與實現相分離，讓兩者都能夠各自變化

簡單實現代碼如下：

#include<iostream>
using namespace std;
class Implementor
{
public:
	virtual void Operation()=0;
};
class ConcreteImplementorA:public Implementor
{
public:
	virtual void Operation()
	{
		cout<<"具體實現A的方法執行"<<endl;
	}
};
class ConcreteImplementorB:public Implementor
{
public:
	virtual void Operation()
	{
		cout<<"具體實現B的方法執行"<<endl;
	}
};
class Abstraction
{
protected:
	Implementor * implementor;
public:
	virtual void SetImplementor(Implementor * implementor)
	{
		this->implementor=implementor;
	}
	virtual void Operation()=0;
	virtual ~Abstraction(){}
};
class RefinedAbstraction:public Abstraction
{
public:
	virtual void Operation()
	{
		implementor->Operation();
	}
	virtual ~RefinedAbstraction()
	{
		if(implementor)
			delete implementor;
	}
};
int main()
{
	Abstraction * ab=new RefinedAbstraction();
	ab->SetImplementor(new ConcreteImplementorA());
	ab->Operation();
	delete ab;
	ab=new RefinedAbstraction();
	ab->SetImplementor(new ConcreteImplementorB());
	ab->Operation();
	delete ab;
	return 0;
}