內容：

某物資管理系統中物資採購需要分級審批，主任可以審批1萬元及以下的採購單，部門經理可以審批5萬元及以下的採購單，副總經理可以審批10萬元及以下的採購單，總經理可以審批20萬元及以下的採購單，20萬元以上的採購單需要開職工大會確定。現用職責鏈模式設計該系統。

程式碼：

#include<iostream>
using namespace std;
class PurchaseRequest {
private:
    int money;
public:
    PurchaseRequest(int money) {
        this->money=money;
    }
    
 
void setMoney(int money) {
        this->money=money;
    }
    int getMoney(){
        return this->money;
    }
};
class Leader {
protected:
    string name;
    Leader *successor;
public:
    Leader(string name) {
        this->name=name;
    }
    void setSuccessor(Leader *successor) {
        
 
this->successor=successor;
    }
    virtual void handleRequest(PurchaseRequest *request)=0;
};
class Director:public Leader{
private:
    string name;
public:
    Director(string name):Leader(name){}
    void handleRequest(PurchaseRequest *request) {
        // TODO Auto-generated method stub
        if
 
(request->getMoney()<=1) {
            cout<<"主任"<<this->name<<"審批"<<request->getMoney()<<"萬元的採購單"<<endl;
        }
        else {
            if(this->successor!=NULL) {
                this->successor->handleRequest(request);
            }
        }
    }
};
class Manager : public Leader{
private:
    string name;
public:
    Manager(string name):Leader(name){}
    void handleRequest(PurchaseRequest *request) {
        if(request->getMoney()<=5) {
            cout<<"部門經理"<<name<<"審批"<<request->getMoney()<<"萬元的採購單"<<endl;
        }
        else {
            if(this->successor!=NULL) {
                this->successor->handleRequest(request);
            }
        }
    }
};
class DeputyGeneralManager: public Leader{
private:
    string name;
public:
    DeputyGeneralManager(string name):Leader(name){}
    void handleRequest(PurchaseRequest *request) {
        if(request->getMoney()<=10) {
            cout<<"副總經理"<<name<<"審批"<<request->getMoney()<<"萬元的採購單"<<endl;
        }
        else {
            if(this->successor!=NULL) {
                this->successor->handleRequest(request);
            }
        }
    }
};
class GeneralManager: public Leader{
private:
    string name;
public:
    GeneralManager(string name):Leader(name){}
    void handleRequest(PurchaseRequest *request) {
        if(request->getMoney()<=20) {
            cout<<"總經理"<<name<<"審批"<<request->getMoney()<<"萬元的採購單"<<endl;
        }
        else if(request->getMoney()>20) {
            cout<<"總經理"<<name<<"召開職工大會審批"<<request->getMoney()<<"萬元的採購單"<<endl;
        }
        else {
            if(this->successor!=NULL) {
                this->successor->handleRequest(request);
            }
        }
    }
};
int main(){
        Leader *objDirector,*objManager,*objDeputyGeneralManager,*objGeneralManager;

        objDirector=new Director("張三");
        objManager=new Manager("李四");
        objDeputyGeneralManager=new DeputyGeneralManager("王五");
        objGeneralManager=new GeneralManager("趙六");

        objDirector->setSuccessor(objManager);
        objManager->setSuccessor(objDeputyGeneralManager);
        objDeputyGeneralManager->setSuccessor(objGeneralManager);

        PurchaseRequest *pr1=new PurchaseRequest(1);
        objDirector->handleRequest(pr1);
        PurchaseRequest *pr2=new PurchaseRequest(3);
        objDirector->handleRequest(pr2);
        PurchaseRequest *pr3=new PurchaseRequest(8);
        objDirector->handleRequest(pr3);
        PurchaseRequest *pr4=new PurchaseRequest(12);
        objDirector->handleRequest(pr4);
        PurchaseRequest *pr5=new PurchaseRequest(22);
        objDirector->handleRequest(pr5);
    return 0;
}

執行結果：