职责链模式

[实验任务一]：财务审批
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。

1.提交类图；

2. 提交源代码；

#include<iostream>
#include<string>
using namespace std;

class PurchaseRequest {
private:
    int type;
    float price;
    int id;

public:
    PurchaseRequest(int type, float price, int id) {
        this->type = type;
        this->price = price;
        this->id = id;
    }

    float GetPrice() {
        return this->price;
    }

    int GetId() {
        return this->id;
    }

    void Print() {
        cout << this->GetId() << "号物资" << this->GetPrice() << "元";
    }
};

class Approver {
protected:
    Approver* approver;
    string position;

public:
    Approver(string position) {
        this->position = position;
    }

    void SetApprover(Approver* approver) {
        this->approver = approver;
    }

    virtual void ProcessRequest(PurchaseRequest* purchaseRequest) = 0;
};

class Director :public Approver {
public:
    Director(string position) :Approver(position) {}

    void SetApprover(Approver *approver) {
        this->approver = approver;
    }

    void ProcessRequest(PurchaseRequest* purchaseRequest) {
        if (purchaseRequest->GetPrice() <= 10000.0)
        {
            cout << "请求编号id =>" << purchaseRequest->GetId() << "   由" << this->position << "处理了" << endl;
        }
        else {
            approver->ProcessRequest(purchaseRequest);
        }
    }
};

class DepartmentManager :public Approver {
public:
    DepartmentManager(string position) :Approver(position) {}

    void SetApprover(Approver* approver) {
        this->approver = approver;
    }

    void ProcessRequest(PurchaseRequest* purchaseRequest) {
        if (purchaseRequest->GetPrice() > 10000.0 && purchaseRequest->GetPrice() <= 50000.0) {
        }
        else {
            approver->ProcessRequest(purchaseRequest);
        }
    }
};

class ViceManager :public Approver {
public:
    ViceManager(string position) :Approver(position) {}

    void SetApprover(Approver* approver) {
        this->approver = approver;
    }

    void ProcessRequest(PurchaseRequest* purchaseRequest) {
        if (purchaseRequest->GetPrice() > 50000.0 && purchaseRequest->GetPrice() <= 100000.0) {
            cout << "请求编号id =>" << purchaseRequest->GetId() << "   由" << this->position << "处理了" << endl;
        }
        else {
            approver->ProcessRequest(purchaseRequest);
        }
    }
};

class GeneralManager :public Approver {
public:
    GeneralManager(string position) :Approver(position) {}

    void SetApprover(Approver* approver) {
        this->approver = approver;
    }

    void ProcessRequest(PurchaseRequest* purchaseRequest) {
        if (purchaseRequest->GetPrice() > 100000.0 && purchaseRequest->GetPrice() <= 200000.0) {
            cout << "请求编号id =>" << purchaseRequest->GetId() << "   由" << this->position << "处理了" << endl;

        }
        else {
            cout << "需要开员工大会决定" << endl;
        }
    }
};

int main() {
    PurchaseRequest* purchaseRequest1 = new PurchaseRequest(1, 9000, 1);
    PurchaseRequest* purchaseRequest2 = new PurchaseRequest(1, 49000, 2);
    PurchaseRequest* purchaseRequest3 = new PurchaseRequest(1, 990                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  00, 3);
    PurchaseRequest* purchaseRequest4 = new PurchaseRequest(1, 190000, 4);
    PurchaseRequest* purchaseRequest5 = new PurchaseRequest(1, 210000, 5);

    Director* director = new Director("主任");
    DepartmentManager* departmentManager = new DepartmentManager("部门经理");
    ViceManager* viceManager = new ViceManager("副总经理");
    GeneralManager* generalManager = new GeneralManager("总经理");

    director->SetApprover(departmentManager);
    departmentManager->SetApprover(viceManager);
    viceManager->SetApprover(generalManager);

    cout << purchaseRequest1->GetId() << "金额" << purchaseRequest1->GetPrice() << endl;
    director->ProcessRequest(purchaseRequest1);
    cout << "---------------------------------------" << endl;

    cout << purchaseRequest2->GetId() << "金额" << purchaseRequest2->GetPrice() << endl;
    director->ProcessRequest(purchaseRequest2);
    cout << "---------------------------------------" << endl;
    
    cout << purchaseRequest3->GetId() << "金额" << purchaseRequest3->GetPrice() << endl;
    director->ProcessRequest(purchaseRequest3);
    cout << "---------------------------------------" << endl;

    cout << purchaseRequest4->GetId() << "金额" << purchaseRequest4->GetPrice() << endl;
    director->ProcessRequest(purchaseRequest4);
    cout << "---------------------------------------" << endl;

    cout << purchaseRequest5->GetId() << "金额" << purchaseRequest5->GetPrice() << endl;
    director->ProcessRequest(purchaseRequest5);
    cout << "---------------------------------------" << endl;
}