基于多态的职工管理系统

1、管理系统需求

职工管理系统可以用来管理公司内所有员工的信息

本教程主要利用C++来实现一个基于多态的职工管理系统

 

公司中职工分为三类：普通员工、经理、老板，显示信息时，需要显示职工编号、职工姓名、职工岗位、以及职责

普通员工职责：完成经理交给的任务

经理职责：完成老板交给的任务，并下发任务给员工

老板职责：管理公司所有事务

 

管理系统中需要实现的功能如下：

• 退出管理程序：退出当前管理系统

• 增加职工信息：实现批量添加职工功能，将信息录入到文件中，职工信息为：职工编号、姓名、部门编号

• 显示职工信息：显示公司内部所有职工的信息

• 删除离职职工：按照编号删除指定的职工

• 修改职工信息：按照编号修改职工个人信息

• 查找职工信息：按照职工的编号或者职工的姓名进行查找相关的人员信息

• 按照编号排序：按照职工编号，进行排序，排序规则由用户指定

• 清空所有文档：清空文件中记录的所有职工信息 （清空前需要再次确认，防止误删）

 

2.worker抽象类，及三个子类

worker.h

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


class Worker {
public:
    virtual void showInfo() = 0;

    virtual string getDeptName() = 0;


    int m_Id;
    string m_Name;
    int m_DeptId;
};

三个子类

employee.h

#pragma once
#include <iostream>
using namespace std;
#include "worker.h"


class Employee :public Worker {
public:
    Employee(int id, string name, int did);

    virtual void showInfo();

    virtual string getDeptName();
};

manager.h

#pragma once
#include <iostream>
using namespace std;
#include "worker.h"


class Manager:public Worker {
public:
    Manager(int id, string name, int did);

    virtual void showInfo();

    virtual string getDeptName();
};

boss.h

#pragma once
#include <iostream>
using namespace std;
#include "worker.h"

class Boss :public Worker{
public:
    Boss(int id, string name, int did);

    virtual void showInfo();

    virtual string getDeptName();
};

三个子类的源文件

employee.cpp

#include "employee.h"

Employee::Employee(int id, string name, int did) {
    this->m_Id = id;
    this->m_Name = name;
    this->m_DeptId = did;
}

void Employee::showInfo() {
    cout << "职工编号： " << this->m_Id
        << " \t职工姓名： " << this->m_Name
        << " \t岗位：" << this->getDeptName()
        << " \t岗位职责：完成经理交给的任务" << endl;
}

string Employee::getDeptName() {
    return string("员工");
}

manager.cpp

#include "manager.h"

Manager::Manager(int id, string name, int did) {
    this->m_Id = id;
    this->m_Name = name;
    this->m_DeptId = did;
}

void Manager::showInfo() {
    cout << "职工编号： " << this->m_Id
        << " \t职工姓名： " << this->m_Name
        << " \t岗位：" << this->getDeptName()
        << " \t岗位职责：完成老板交给的任务,并下发任务给员工" << endl;
}

string Manager::getDeptName() {
    return string("经理");
}

boss.cpp

#include "boss.h"

Boss::Boss(int id, string name, int did) {
    this->m_Id = id;
    this->m_Name = name;
    this->m_DeptId = did;
}

void Boss::showInfo() {
    cout << "职工编号： " << this->m_Id
        << " \t职工姓名： " << this->m_Name
        << " \t岗位：" << this->getDeptName()
        << " \t岗位职责：管理公司所有事务" << endl;
}

string Boss::getDeptName() {
    return string("总裁");
}

 

3.管理类

workerManager.h 

#pragma once
#include <iostream>
#include <fstream>
using namespace std;
#include "worker.h"


#define FILENAME "empFile.txt"

class WorkerManager {
public:
    WorkerManager();

    ~WorkerManager();

    void Show_Menu();

    void exitSystem();

    void Add_Emp();

    void save();

    int get_EmpNum();

    void init_Emp();

    void Show_Emp();

    void Del_Emp();

    int IsExist(int id);

    void Mod_Emp();

    void Find_Emp();

    void Sort_Emp();

    void Clean_Emp();

    //成员变量
    int m_EmpNum;
    Worker ** m_EmpArray;
    bool m_FileIsEmpty;

};

workerManager.cpp源文件

#include "workerManager.h"
#include "worker.h"
#include "employee.h"
#include "manager.h"
#include "boss.h"

WorkerManager::WorkerManager() {
    ifstream ifs;
    ifs.open(FILENAME, ios::in);

    if (!ifs.is_open()) {
        cout << "文件不存在" << endl;
        this->m_EmpNum = 0;
        this->m_EmpArray = NULL;
        this->m_FileIsEmpty = true;
        ifs.close();
        return;
    }

    char ch;
    ifs >> ch;
    if (ifs.eof()) {
        cout << "文件为空!" << endl;
        this->m_EmpNum = 0;
        this->m_FileIsEmpty = true;
        this->m_EmpArray = NULL;
        ifs.close();
        return;
    }

    int num = this->get_EmpNum();

    this->m_EmpNum = num;
    this->m_EmpArray = new Worker * [this->m_EmpNum];

    init_Emp();
    
}

void WorkerManager::Show_Menu() {
    cout << "********************************************" << endl;
    cout << "*********  欢迎使用职工管理系统！ **********" << endl;
    cout << "*************  0.退出管理程序  *************" << endl;
    cout << "*************  1.增加职工信息  *************" << endl;
    cout << "*************  2.显示职工信息  *************" << endl;
    cout << "*************  3.删除离职职工  *************" << endl;
    cout << "*************  4.修改职工信息  *************" << endl;
    cout << "*************  5.查找职工信息  *************" << endl;
    cout << "*************  6.按照编号排序  *************" << endl;
    cout << "*************  7.清空所有文档  *************" << endl;
    cout << "********************************************" << endl;
    cout << endl;
}

void WorkerManager::exitSystem() {
    cout << "欢迎下次使用" << endl;
    system("pause");
    exit(0);
}

WorkerManager::~WorkerManager() {
    if (this->m_EmpArray != NULL) {
        delete[] this->m_EmpArray;
    }
}

void WorkerManager::Add_Emp() {
    cout << "请输入增加职工的数量" << endl;

    int addNum = 0;
    cin >> addNum;

    if (addNum > 0) {
        int newSize = this->m_EmpNum + addNum;
        Worker** newSpace = new Worker * [newSize];

        if (this->m_EmpArray != NULL) {
            for (int i = 0; i < this->m_EmpNum; i++) {
                newSpace[i] = this->m_EmpArray[i];
            }
        }

        for (int i = 0; i < addNum; i++) {
            int id;
            string name;
            int dSelect;

            cout << "请输入第 " << i + 1 << " 个新职工编号：" << endl;
            cin >> id;

            cout << "请输入第 " << i + 1 << " 个新职工姓名：" << endl;
            cin >> name;

            cout << "请选择该职工的岗位：" << endl;
            cout << "1、普通职工" << endl;
            cout << "2、经理" << endl;
            cout << "3、老板" << endl;
            cin >> dSelect;

            Worker* worker = NULL;
            switch (dSelect) {
            case 1: //普通员工
                worker = new Employee(id, name, 1);
                break;
            case 2: //经理
                worker = new Manager(id, name, 2);
                break;
            case 3:  //老板
                worker = new Boss(id, name, 3);
                break;
            default:
                break;
            }

            newSpace[this->m_EmpNum + i] = worker;
        }

        delete[] this->m_EmpArray;

        this->m_EmpArray = newSpace;
        this->m_EmpNum = newSize;
        this->m_FileIsEmpty = false;

        cout << "成功添加" << addNum << "名新职工！" << endl;

        this->save();
    }else{
        cout << "输入有误" << endl;
    }

    system("pause");
    system("cls");
}

void WorkerManager::save() {
    ofstream ofs;
    ofs.open(FILENAME, ios::out);

    for (int i = 0; i < this->m_EmpNum; i++) {
        ofs << this->m_EmpArray[i]->m_Id << " "
            << this->m_EmpArray[i]->m_Name << " "
            << this->m_EmpArray[i]->m_DeptId << endl;
    }

    ofs.close();
}


int WorkerManager::get_EmpNum() {
    ifstream ifs;
    ifs.open(FILENAME, ios::in);

    int id;
    string name;
    int did;

    int num = 0;

    while (ifs >> id && ifs >> name && ifs >> did) {
        num++;
    }

    ifs.close();
    return num;
}


void WorkerManager::init_Emp() {
    ifstream ifs;
    ifs.open(FILENAME, ios::in);

    int id;
    string name;
    int did;

    int index = 0;
    while (ifs >> id && ifs >> name && ifs >> did) {
        Worker *worker = NULL;
        if (did == 1) {
            worker = new Employee(id, name, did);
        }
        else if (did == 2) {
            worker = new Manager(id, name, did);
        }
        else {
            worker = new Boss(id, name, did);
        }

        this->m_EmpArray[index] = worker;
        index++;
    }
}


void WorkerManager::Show_Emp() {
    if (this->m_FileIsEmpty) {
        cout << "文件不存在或记录为空！" << endl;
    }
    else {
        for (int i = 0; i < this->m_EmpNum; i++) {
            this->m_EmpArray[i]->showInfo();
        }
    }

    system("pause");
    system("cls");
}


int WorkerManager::IsExist(int id) {
    int index = -1;

    for (int i = 0; i < this->m_EmpNum; i++) {
        if (this->m_EmpArray[i]->m_Id == id) {
            index = i;
            break;
        }
    }
    return index;
}



void WorkerManager::Del_Emp() {
    if (this->m_FileIsEmpty) {
        cout << "文件不存在或记录为空！" << endl;
    }
    else {
        cout << "请输入想要删除的职工号：" << endl;
        int id = 0;
        cin >> id;

        int index = this->IsExist(id);

        if (index == -1) {
            cout << "删除失败，未找到该职工" << endl;
        }
        else {
            for (int i = index; i < this->m_EmpNum-1; i++) {
                this->m_EmpArray[i] = this->m_EmpArray[i + 1];
            }
            this->m_EmpNum--;

            if (this->m_EmpNum == 0) {
                this->m_FileIsEmpty = true;
            }

            this->save();
            cout << "删除成功！" << endl;
        }
    }

    system("pause");
    system("cls");
}


void WorkerManager::Mod_Emp() {
    if (this->m_FileIsEmpty) {
        cout << "文件不存在或记录为空！" << endl;
    }
    else {
        cout << "请输入修改职工的编号：" << endl;
        int id;
        cin >> id;

        int ret = this->IsExist(id);

        if (ret == -1) {
            cout << "修改失败，查无此人" << endl;
        }
        else {
            delete this->m_EmpArray[ret];

            int newId = 0;
            string newName = " ";
            int dSelect = 0;

            cout << "查到： " << id << "号职工，请输入新职工号： " << endl;
            cin >> newId;

            cout << "请输入新姓名： " << endl;
            cin >> newName;

            cout << "请输入岗位： " << endl;
            cout << "1、普通职工" << endl;
            cout << "2、经理" << endl;
            cout << "3、老板" << endl;
            cin >> dSelect;

            Worker *worker = NULL;
            switch (dSelect) {
            case 1:
                worker = new Employee(newId, newName, dSelect);
                break;
            case 2:
                worker = new Manager(newId, newName, dSelect);
                break;
            case 3:
                worker = new Boss(newId, newName, dSelect);
                break;
            default:
                break;
            }

            this->m_EmpArray[ret] = worker;
            cout << "修改成功！" << endl;

            this->save();
        }
    }

    system("pause");
    system("cls");
}


void WorkerManager::Find_Emp() {
    if (this->m_FileIsEmpty) {
        cout << "文件不存在或记录为空！" << endl;
    }
    else {
        cout << "请输入查找的方式：" << endl;
        cout << "1、按职工编号查找" << endl;
        cout << "2、按姓名查找" << endl;

        int select = 0;
        cin >> select;

        if (select == 1) {
            int id;
            cout << "请输入查找的职工编号：" << endl;
            cin >> id;

            int ret = this->IsExist(id);
            if (ret == -1) {
                cout << "查找失败，查无此人" << endl;
            }
            else {
                cout << "查找成功！该职工信息如下：" << endl;
                this->m_EmpArray[ret]->showInfo();
            }
        }
        else if (select == 2) {
            string name;
            cout << "请输入查找的姓名：" << endl;
            cin >> name;

            bool flag = false;
            for (int i = 0; i < this->m_EmpNum; i++) {
                if (this->m_EmpArray[i]->m_Name == name) {
                    flag = true;

                    cout << "查找成功,职工编号为："
                        << m_EmpArray[i]->m_Id
                        << " 号的信息如下：" << endl;

                    this->m_EmpArray[i]->showInfo();
                }
            }
            if (flag == false) {
                cout << "查找失败，查无此人" << endl;
            }
        }
        else {
            cout << "输入选项有误" << endl;
        }
    }

    system("pause");
    system("cls");
}


void WorkerManager::Sort_Emp() {
    if (this->m_FileIsEmpty) {
        cout << "文件不存在或记录为空！" << endl;
        system("pause");
        system("cls");
    }
    else {
        cout << "请选择排序方式： " << endl;
        cout << "1、按职工号进行升序" << endl;
        cout << "2、按职工号进行降序" << endl;

        int select = 0;
        cin >> select;


        for (int i = 0; i < m_EmpNum; i++) {
            int minormax = i;
            for (int j = i + 1; j < m_EmpNum; j++) {
                if (select == 1) {
                    if (m_EmpArray[minormax]->m_Id > m_EmpArray[j]->m_Id) {
                        minormax = j;
                    }
                }
                else {
                    if (m_EmpArray[minormax]->m_Id < m_EmpArray[j]->m_Id) {
                        minormax = j;
                    }
                }
            }
            if (i != minormax) {
                Worker* temp = m_EmpArray[i];
                m_EmpArray[i] = m_EmpArray[minormax];
                m_EmpArray[minormax] = temp;
            }
        }

        cout << "排序成功,排序后结果为：" << endl;
        this->save();
        this->Show_Emp();
    }

}


void WorkerManager::Clean_Emp() {
    cout << "确认清空？" << endl;
    cout << "1、确认" << endl;
    cout << "2、返回" << endl;

    int select = 0;
    cin >> select;

    if (select == 1) {
        ofstream ofs(FILENAME, ios::trunc);
        ofs.close();

        if (this->m_EmpArray != NULL) {
            for (int i = 0; i < this->m_EmpNum; i++) {

                if(this->m_EmpArray[i] != NULL)
                    delete this->m_EmpArray[i];

            }
            this->m_EmpNum = 0;
            delete[] this->m_EmpArray;
            this->m_EmpArray = NULL;
            this->m_FileIsEmpty = true;
        }
        cout << "清空成功！" << endl;
    }

    system("pause");
    system("cls");
}

4.系统

#include <iostream>
#include "workerManager.h"
#include "worker.h"
#include "employee.h"
#include "manager.h"
#include "boss.h"





int main() {

    WorkerManager wm;
    int choice = 0;
    while (true) {
        wm.Show_Menu();
        cout << "输出你的选择" << endl;
        cin >> choice;

        switch (choice) {
        case 0: //退出系统
            wm.exitSystem();
            break;
        case 1: //添加职工
            wm.Add_Emp();
            break;
        case 2: //显示职工
            wm.Show_Emp();
            break;
        case 3: //删除职工
            wm.Del_Emp();
            break;
        case 4: //修改职工
            wm.Mod_Emp();
            break;
        case 5: //查找职工
            wm.Find_Emp();
            break;
        case 6: //排序职工
            wm.Sort_Emp();
            break;
        case 7: //清空文件
            wm.Clean_Emp();
            break;
        default:
            system("cls");
            break;
        }
    }


    system("pause");
    return 0;
}