如何用C++基于多态设计职工管理系统

主模块(职工管理系统.cpp)

#include

using namespace std;

#include "workerManger.h"

#include "worker.h"

#include "employee.h"

#include "Boss.h"

#include "Manager.h"

int main()

{

//实例化一个管理者对象智汇代理申请

WorkerManger wm;

int choice = 0;

while (true)

{

//调用成员函数显示菜单

wm.Show_Menu();

cout << "请输入您的选择：" << endl;

cin >> choice;

switch (choice)

{

case 0://退出

wm.ExitSystem();

break;

case 1://增加

wm.Add_Emp();

break;

case 2://显示

wm.Show_Emp();

break;

case 3://删除

wm.Del_Emp();

break;

case 4://修改

wm.Mod_Emp();

break;

case 5://查找

wm.Find_Emp();

break;

case 6://排序

wm.Sort_Emp();

break;

case 7://清空

wm.Clean_File();

break;

default:

system("cls");//清屏

break;

}

}

system("pause");

return 0;

}

workerManger.h的文件：

#pragma once //防止头文件重复包含

#include

#include

#include "worker.h"

#include "employee.h"

#include "Boss.h"

#include "Manager.h"

#define FILENAME "empFile.txt"

using namespace std;

class WorkerManger

{

public:

//构造函数

WorkerManger();

//展示菜单

void Show_Menu();

//退出系统

void ExitSystem();

//记录职工人数

int m_EmpNum;

//职工数组指针

Worker ** m_EmpArray;

//添加职工

void Add_Emp();

//保存文件

void save();

//判断文件是否为空的标志

bool m_FileIsEmpty;

//统计文件中的人数

int get_EmpNum();

//初始化职工

void init_Emp();

//显示职工

void Show_Emp();

//删除职工

void Del_Emp();

//判断职工是否存在

int IsExist(int id);

//修改职工

void Mod_Emp();

//查找职工

void Find_Emp();

//按编号排序

void Sort_Emp();

//清空文件

void Clean_File();

//析构函数

~WorkerManger();

};

workerManger.cpp文件：

#include "workerManger.h"

WorkerManger::WorkerManger()

{

//1、文件不存在

ifstream ifs;

ifs.open(FILENAME, ios::in);

if (!ifs.is_open())

{

this->m_EmpNum = 0; //初始化记录人数

this->m_EmpArray = NULL; //初始化数组指针

this->m_FileIsEmpty = true; //初始化文件是否为空

ifs.close();

return;

}

//文件存在，数据为空

char ch;

ifs >> ch;

if (ifs.eof())

{

this->m_EmpNum = 0; //初始化记录人数

this->m_EmpArray = NULL; //初始化数组指针

this->m_FileIsEmpty = true; //初始化文件是否为空

ifs.close();

return;

}

//当文件存在并且记录有数据

int num = this->get_EmpNum();

this->m_EmpNum = num;

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

this->init_Emp();

}

//展示菜单

void WorkerManger::Show_Menu()

{

cout << "*****" << endl;

cout << " 欢迎使用职工管理系统! " << endl;

cout << "** 0:退出管理系统 ***" << 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;

}

//添加职工

void WorkerManger::Add_Emp()

{

cout << "请输入添加的职工数量：" << endl;

int addNum = 0; //保存用户的输入数量

cin >> addNum;

if(addNum > 0)

{

//计算添加新空间的大小

int newSize = this->m_EmpNum + addNum; //新空间人数 = 原来记录人数 + 新增人数

//开辟新空间

Worker * newSpace = new Worker[newSize];

//将原来空间下数据，拷贝到新空间下

if (this->m_EmpArray != NULL)

{

for (int i = 0; i < this->m_EmpNum; i++)

{

newSpace[i] = this->m_EmpArray[i];

}

}

//批量添加新数据

for (int i = 0; i < addNum; i++)

{

int id; //职工编号

string name; //职工姓名

int dSelect; //部门选择

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(id, name, 1);

break;

case 2:

worker = new Manager(id, name, 2);

break;

case 3:

worker = new Boss(id, name, 3);

break;

default:

break;

}

//将创建职工职责，保存到数组中

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

}

//释放原有空间

delete[] this->m_EmpArray;

//更改新空间的指向

this->m_EmpArray = newSpace;

//更新新的职工人数

this->m_EmpNum = newSize;

this->m_FileIsEmpty = false; //职工不为空

//提示添加成功

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

//保存数据到文件中

this->save();

}

else

{

cout << "输入有误!" << endl;

}

//按任意键后 清屏回到上级目录

system("pause");

system("cls");

}

//统计文件中的人数

int WorkerManger::get_EmpNum()

{

ifstream ifs;

ifs.open(FILENAME, ios::in); // 打开文件 读文件

int id;

string name;

int dId;

int num = 0;

while (ifs >> id && ifs >> name && ifs >> dId)

{

//统计人数

num++;

}

return num;

}

//退出系统

void WorkerManger::ExitSystem()

{

cout << "欢迎下次使用" << endl;

system("pause");

exit(0);//退出程序

}

//保存文件

void WorkerManger::save()

{

ofstream ofs;

ofs.open(FILENAME, ios::out); //用输出的方式打开文件--写文件

//将每个人的数据写到文件中

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;

}

//关闭文件

ofs.close();

}

//初始化职工

void WorkerManger::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) //普通职工

{

worker = new Employee(id, name, dId);

}

else if (dId == 2) // 经理

{

worker = new Manager(id, name, dId);

}

else

{

worker = new Boss(id, name, dId);

}

this->m_EmpArray[index] = worker;

index++;

}

ifs.close();

}

//显示职工

void WorkerManger::Show_Emp()

{

//判断文件是否为空

if (this->m_FileIsEmpty)

{

cout << "文件不存在或者记录为空!" << endl;

}

else

{

for (int i = 0; i < m_EmpNum; i++)

{

//利用多态调用程序接口

this->m_EmpArray[i]->showInfo();

}

}

system("pause");

system("cls");

}

//删除职工

void WorkerManger::Del_Emp()

{

if (this->m_FileIsEmpty)

{

cout << "文件不存在或者记录为空!" << endl;

}

else

{

//按照编号删除职工

cout << "请输入想要删除的职工编号：" << endl;

int id = 0;

cin >> id;

int index = this->IsExist(id);

if (index != -1) //职工存在，并且要删除index位置上的职工

{

//数据前移

for (int i = index; i < this->m_EmpNum - 1; i++)

{

this->m_EmpArray[i] = this->m_EmpArray[i + 1];

}

this->m_EmpNum--;//更新数组中记录的人员个数

//同步更新到文件

this->save();

cout << "删除成功!" << endl;

}

else

{

cout << "删除失败!未找到该职工!" << endl;

}

}

system("pause");

system("cls");

}

//判断职工是否存在

int WorkerManger::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;

}

//修改职工

void WorkerManger::Mod_Emp()

{

if (this->m_FileIsEmpty)

{

cout << "文件不存在或记录为空!" << endl;

}

else

{

cout << "请输入要修改的职工编号：" << endl;

int id;

cin >> id;

int ret = this->IsExist(id);

if (ret != -1)//查找到职工

{

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;

}

//更新数据

this->m_EmpArray[ret] = worker;

cout << "修改成功!" << endl;

this->save(); //保存到文件

}

else

{

cout << "修改失败!查无此人!" << endl;

}

}

system("pause");

system("cls");

}

//查找职工

void WorkerManger::Find_Emp()

{

if (this->m_FileIsEmpty)

{

cout << "文件不存爱或者记录为空!" << endl;

}

else

{

cout << "请输入查找方式：" << endl;

cout << "1、按职工编号查找" << endl;

cout << "2、按职工姓名查找" << endl;

int select;

cin >> select;

if (select == 1)

{

//按编号

int id;

cout << "请输入查找的职工编号：" << endl;

cin >> id;

int ret = this->IsExist(id);

if (ret != -1)

{

//找到职工

cout << "查找成功!该职工的信息如下：" << endl;

this->m_EmpArray[ret]->showInfo();

}

else

{

cout << "查找失败!查无此人!" << endl;

}

}

else if(select == 2)

{

//按姓名

string name;

cout << "请输入查找的姓名：";

cin >> name;

bool flag = false; //判断是否查到, 默认未找到

for (int i = 0; i < m_EmpNum; i++)

{

if (this->m_EmpArray[i]->m_Name == name)

{

cout << "查找成功，职工编号为 "

<< this->m_EmpArray[i]->m_ID

<< "的职工信息如下：" << endl;

this->m_EmpArray[i]->showInfo();

flag = true;

}

}

if (flag == false)

{

cout << "查找失败!查无此人!" << endl;

}

}

else

{

cout << "输入的选项有误!" << endl;

}

}

system("pause");

system("cls");

}

//排序

void WorkerManger::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、按照职工编号升序排列" << endl;

cout << "2、按照职工编号降序排列" << endl;

int select;

cin >> select;

for (int i = 0; i < this->m_EmpNum; i++)

{

int MinOrMax = i;

for (int j = i + 1; j < this->m_EmpNum; j++)

{

if (select == 1)//升序

{

if (this->m_EmpArray[MinOrMax]->m_ID > this->m_EmpArray[j]->m_ID)

{

MinOrMax = j;

}

}

else

{

if (this->m_EmpArray[MinOrMax]->m_ID < this->m_EmpArray[j]->m_ID)

{

MinOrMax = j;

}

}

}

//判断一开始认定的最小值或最大值是不是计算的最小值或最大值 如果不是 交换

if (i != MinOrMax)

{

Worker * temp = this->m_EmpArray[i];

this->m_EmpArray[i] = this->m_EmpArray[MinOrMax];

this->m_EmpArray[MinOrMax] = temp;

}

}

cout << "排序成功!排序后的结果为：" << endl;

this->save();//排序后结果保存到文件

this->Show_Emp();//展示所有职工

}

}

//清空文件

void WorkerManger::Clean_File()

{

cout << "确定清空吗?" << endl;

cout << "1、确定" << endl;

cout << "2、返回" << endl;

int select = 0;

cin >> select;

if (select == 1)

{

ofstream ofs(FILENAME, ios::trunc);//删除文件后重新创建

ofs.close();

if (this->m_EmpArray != NULL)

{

for (int i = 0; i < this->m_EmpNum; i++)

{

delete this->m_EmpArray[i];

this->m_EmpArray[i] = NULL;

}

//删除堆区数组指针

delete[] this->m_EmpArray;

this->m_EmpArray = NULL;

this->m_EmpNum = 0;

this->m_FileIsEmpty = true;

}

cout << "清空成功!" << endl;

}

system("pause");

system("cls");

}

WorkerManger::~WorkerManger()

{

if (this->m_EmpArray != NULL)

{

delete[] this->m_EmpArray;

this->m_EmpArray = NULL;

}

}

worker.h文件：

#pragma once

#include

using namespace std;

#include

//职工抽象类

class Worker

{

public:

//显示个人信息

virtual void showInfo() = 0;

//获取岗位名称

virtual string getDeptName() = 0;

int m_ID; //职工编号

string m_Name; //职工姓名

int m_DeptID; //部门编号

};

employee.h文件：

//普通员工文件

#pragma once

#include

#include

using namespace std;

#include "worker.h"

class Employee : public Worker

{

public:

//构造函数

Employee(int id, string name, int dID);

//显示个人信息

void showInfo();

//获取岗位名称

string getDeptName();

};

employee.cpp文件：

#include "employee.h"

//构造函数

Employee::Employee(int id, string name, int dID)

{

this->m_ID = id;

this->m_Name = name;

this->m_DeptID = dID;

}

//显示个人信息

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;

}

//获取岗位名称

string Employee::getDeptName()

{

return string("员工");

}

Manager.h文件：

#pragma once

#include

#include "worker.h"

using namespace std;

//经理类

class Manager : public Worker

{

public:

//构造函数

Manager(int id, string name, int dId);

//显示个人信息

virtual void showInfo();

//获取岗位名称

virtual string getDeptName();

};

Manager.cpp文件：

#include "Manager.h"

//构造函数

Manager::Manager(int id, string name, int dId)

{

this->m_ID = id;

this->m_Name = name;

this->m_DeptID = dId;

}

//显示个人信息

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且下发任务给普通员工" << endl;

}

//获取岗位名称

string Manager::getDeptName()

{

return string("经理");

}

Boss.h文件：

#pragma once

#include

#include "worker.h"

using namespace std;

//经理类

class Boss : public Worker

{

public:

//构造函数

Boss(int id, string name, int dId);

//显示个人信息

virtual void showInfo();

//获取岗位名称

virtual string getDeptName();

};

Boss.cpp文件：

#include "Boss.h"

//构造函数

Boss::Boss(int id, string name, int dId)

{

this->m_ID = id;

this->m_Name = name;

this->m_DeptID = dId;

}

//显示个人信息

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: 管理公司所有事物" << endl;

}

//获取岗位名称

string Boss::getDeptName()

{

return string("老板");

}