c++实现职责链模式--财务审批

内容：

某物资管理系统中物资采购需要分级审批，主任可以审批1万元及以下的采购单，部门经理可以审批5万元及以下的采购单，副总经理可以审批10万元及以下的采购单，总经理可以审批20万元及以下的采购单，20万元以上的采购单需要开职工大会确定。现用职责链模式设计该系统。

代码：

#include
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<<"审批"<getMoney()<<"万元的采购单"<<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<<"部门经理"<"审批"<getMoney()<<"万元的采购单"<<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<<"副总经理"<"审批"<getMoney()<<"万元的采购单"<<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<<"总经理"<"审批"<getMoney()<<"万元的采购单"<<endl;
        }
        else if(request->getMoney()>20) {
            cout<<"总经理"<"召开职工大会审批"<getMoney()<<"万元的采购单"<<endl;
        }
        else {
            if(this->successor!=NULL) {
                this->successor->handleRequest(request);
            }
        }
    }
};
int main(){
        Leader *objDirector,*objManager,*objDeputyGeneralManager,*objGeneralManager;

        objDirector=new Director("张三");
        objManager=new Manager("李四");
        objDeputyGeneralManager=new DeputyGeneralManager("王五");
        objGeneralManager=new GeneralManager("赵六");

        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;
}

运行结果：