职责链模式 Responsibility

职责链模式：

对于一个请求，自己处理不了的，交于上级处理，形成了一个职责链，依次交于上级处理

// Responsibility.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <STRING>
using namespace std;

class Business{
public:
    void setprice(int price){
        m_price = price;
    }
    int getprice(){
        return m_price;
    }
protected:
    int m_price;
};

class Manager{
public:
    Manager(string name):m_name(name){}
    virtual void handle(Business * bus) = 0;
    void setsuper(Manager * other){
        this->super = other;
    }
    virtual ~Manager(){}
protected:
    string m_name;
    Manager * super;
};

class TownManager:public Manager{
public:
    TownManager(string name):Manager(name){}
    void handle(Business * bus){
        if(bus->getprice() < 10000){
            cout<<this->m_name<<" handle "<<bus->getprice()<<endl;
        }
        else{
            if(bus != NULL){
                this->super->handle(bus);
            }
        }
    }
};

class CityManager:public Manager{
public:
    CityManager(string name):Manager(name){}
    void handle(Business * bus){
        if(bus->getprice() < 20000){
            cout<<this->m_name<<" handle "<<bus->getprice()<<endl;
        }
        else{
            if(bus != NULL){
                this->super->handle(bus);
            }
        }
    }
};

class CountryManager:public Manager{
public:
    CountryManager(string name):Manager(name){}
    void handle(Business * bus){
        if(bus->getprice() < 30000){
            cout<<this->m_name<<" handle "<<bus->getprice()<<endl;
        }
        else{
            if(bus != NULL){
                cout<<this->m_name<<" 有点麻烦"<<endl;
            }
        }
    }
};

int main(int argc, char* argv[])
{
    Manager * ptown = new TownManager("镇公司");
    Manager * pcity = new CityManager("市公司");
    Manager * pcoun = new CountryManager("国家公司");
    ptown->setsuper(pcity);
    pcity->setsuper(pcoun);

    Business * pbusiness = new Business;
    int array[3] = {5000,15000,25000};
    for(int i  = 0;i<3;i++){
        pbusiness->setprice(array[i]);
        ptown->handle(pbusiness);
    }

    delete ptown;
    delete pcity;
    delete pcoun;
    delete pbusiness;
    return 0;
}