/****************************************************************************************************
链式
概念(使用一个单链表，尾结点指向空，然后挨个遍历此结点指向的函数（这些函数都来自与抽象类中函数的重写）
将则责任链上的对象统统创建出来，然后执行到哪个对象，哪个对象就去调用这个重写的函数方法)
适用于：
链条式处理事情。工作流程化、消息处理流程化、事物流程化；
****************************************************************************************************/
#include <iostream>
using namespace std;
class CarHandle//责任链，设计一个类将其创建成链
{
public:
virtual void HandleCar() = 0;
public:
CarHandle *setNextHandle(CarHandle *carhandle)
{
this->carhandle = carhandle;
return this->carhandle;
}
protected:
CarHandle *carhandle;
};
class CarHandleHead : public CarHandle
{
public:
virtual void HandleCar()
{
cout << "处理车头" << endl;
if (this->carhandle != NULL)
{
carhandle->HandleCar();
}
}
};
class CarHandleBody : public CarHandle
{
public:
virtual void HandleCar()
{
cout << "处理车身" << endl;
if (this->carhandle != NULL)
{
carhandle->HandleCar();
}
}
};
class CarHandleTail : public CarHandle
{
public:
virtual void HandleCar()
{
cout << "处理车尾" << endl;
if (this->carhandle != NULL)
{
carhandle->HandleCar();
}
}
};
class CarHandleyou : public CarHandle
{
public:
virtual void HandleCar()
{
cout << "handle you" << endl;
if (this->carhandle != NULL)
{
carhandle->HandleCar();
}
}
};
void main()
{
CarHandleHead *head = new CarHandleHead;
CarHandleBody *body = new CarHandleBody;
CarHandleTail *tail = new CarHandleTail; //这里是创建一些列的对象，对象包含下一个结点的指针
CarHandleyou *you = new CarHandleyou;
head->setNextHandle(body);//在这里将这些函数使用链表串起来
body->setNextHandle(tail);
tail->setNextHandle(you);
you->setNextHandle(NULL);
//处理
head->HandleCar();
delete head;
delete body;
delete tail;
delete you;
system("pause");
}
参考： 传智播客--王保明
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