实现该七个功能：退出管理程序、增加职工信息、显示职工信息、删除离职职工、修改职工信息、查找职工信息、按照编号排序、清空所有文档。

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text.cpp

#include#includeusing namespace std;
#include"workerManager.h"

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



int main()
{
	测试
	//Worker* worker = NULL;
	//worker = new Employee(1, "maliyue", 1);
	//worker->showInfo();
	//delete worker;

	//worker = new Manager(2, "lily", 2);
	//worker->showInfo();
	//delete worker;

	//worker = new Boss(3, "Ly", 3);
	//worker->showInfo();
	//delete worker;

	WorkerManager wm;
	
	int choice = 0;
	while (true)
	{
		wm.Show_Menu();
		cout<< "请输入您的选择："<< endl;
		cin >>choice;
		switch (choice)
		{
		case 0:
			wm.ExitSystem();
			break;
		case 1:
			wm.Add_Emp();
			break;
		case 2:
			wm.Show_Emp();
			break;
		case 3:
			wm.Del_Emp();
			break;
		case 4:
			wm.Mod_Emp();
			break;
		case 5:
			wm.Find_Emp();
			break;
		case 6:
			wm.Sort_Emp();
			break;
		case 7:
			wm.Clean_File();
			break;
		default:
			system("cls");
			break;
		}
	}

	system("pause");
	return 0;
}

workermanager.h

#pragma once
#includeusing namespace std;
#include"worker.h"
#include"employee.h"
#include"manager.h"
#include"boss.h"

//设定文件路径
#include#define FILENAME "empFile.txt"

class WorkerManager
{
public:
	//构造函数
	WorkerManager();

	//菜单界面
	void Show_Menu();

	//退出系统
	void ExitSystem();

	//记录职工人数
	int m_EmpNum;

	Worker** m_EmpArray;

	//添加职工
	void Add_Emp();

	//保存文件
	void save();

	//判断文件是否为空 标志
	bool m_FileIsEmpty;

	//统计文件中人数
	int get_EmpNum();

	//初始化员工
	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 如果存在返回职工所在数组中的位置，不存在返回-1
	int IsExist(int id);

	//修改职工
	void Mod_Emp();

	//查找职工
	void Find_Emp();

	//排序职工
	void Sort_Emp();

	//清空文件
	void Clean_File();

	~WorkerManager();
};

workermanager.cpp

#include"workerManager.h"

WorkerManager::WorkerManager()
{
	//1、文件不存在
	ifstream ifs;
	ifs.open(FILENAME, ios::in);

	if (!ifs.is_open())
	{
		//cout<< "文件不存在"<< endl;
		this->m_EmpNum = 0;
		//初始化数组指针
		this->m_EmpArray = NULL;
		//初始化文件是否为空
		this->m_FileIsEmpty = true;
		ifs.close();
		return;
	}
	//2、文件存在数据为空
	char ch;
	ifs >>ch;
	if (ifs.eof())
	{
		//cout<< "文件为空"<< endl;
		this->m_EmpNum = 0;
		//初始化数组指针
		this->m_EmpArray = NULL;
		//初始化文件是否为空
		this->m_FileIsEmpty = true;
		ifs.close();
		return;
	}
	//3、文件存在 并记录数据
	int num = this->get_EmpNum();
	//cout<< "职工人数为："<< num<< endl;
	this->m_EmpNum = num;
	
	//开辟空间
	this->m_EmpArray = new Worker * [this->m_EmpNum];
	//将文件中的数据存放到数组中
	this->init_Emp();

	//测试代码
	//for (int i = 0; i< this->m_EmpNum; i++)
	//{
	//	cout<< "职工编号："<< this->m_EmpArray[i]->m_Id
	//		<<  "  职工姓名："<< this->m_EmpArray[i]->m_Name
	//		<<  "  部门编号："<< this->m_EmpArray[i]->m_DeptId<< endl;
	//}
}

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);
}

void WorkerManager::Add_Emp()
{
	cout<< "请输入添加职工数量："<< endl;

	int addNum = 0;
	cin >>addNum;

	if (addNum >0)
	{
		//计算添加新空间大小
		int newSize = this->m_EmpNum + addNum;
		//开辟新空间
		Worker ** newSpace = new Worker* [newSize];
		//将原空间数据拷贝到新空间
		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;
			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;
			}
			//将创建职工指针，保存到数组中
			newSpace[this->m_EmpNum + i] = worker;

		}
		//释放原有空间
		delete[] this->m_EmpArray;
		//更改新空间指向
		this->m_EmpArray = newSpace;
		//更新新职工人数
		this->m_EmpNum = newSize;

		//更新职工不为空标志
		this->m_FileIsEmpty = false;

		//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<< "输入数据有误"<< endl;
	}
	//按任意键后清屏返回上级目录
	system("pause");
	system("cls");
}

void WorkerManager::save()
{
	ofstream ofs;
	ofs.open(FILENAME, ios::out);//用输出的方式打开文件

	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();
}

//统计文件中人数
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++;
	}
	return num;
}

//初始化员工
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++;
	}
	//关闭文件
	ifs.close();
}

//显示职工
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< 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 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编号："<< endl;
		int id = 0;
		cin >>id;

		int index = this->IsExist(id);
		if (index != -1)
		{
			//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--;//更新数组记录人员个数
			//数据同步更新到文件中
			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 如果存在返回职工所在数组中的位置，不存在返回-1
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;
}

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

		int ret = this->IsExist(id);
		if (ret != -1)
		{
			//查找到编号职工
			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;
			}
			//更新数据到数组中
			this->m_EmpArray[ret] = worker;

			cout<< "修改成功！"<< endl;

			//保存到文件
			this->save();	
		}
		else
		{
			cout<< "修改失败，查无此人！"<< endl;
		}
	}
	system("pause");
	system("cls");
}

//查找职工
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、按照职工编号查找"<< endl;
		cout<< "2、按照职工姓名查找"<< 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 = IsExist(id);
			if (ret != -1)
			{
				cout<< "查找成功！该职工信息如下："<< endl;
				this->m_EmpArray[ret]->showInfo();
			}
			else
			{
				cout<< "查找失败，查无此人"<< endl; 
			}
		}
		else if(select==2)
		{
			string name;
			cout<< "请输入查找的职工姓名："<< endl;
			cin >>name;

			//加入判断是否查到标志
			bool flag = false;

			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："<m_EmpArray[i]->m_Id
						<<"号职工信息如下："<< endl;
					flag = true;

					this->m_EmpArray[i]->showInfo();
				}
			}
			if (flag == false)
			{
				cout<< "输入选项有误！"<< endl;
			}

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

}


//排序职工
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< 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//降序
				{
					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（大）值，是不是计算的最小（大）值，如果不是 交换数据
			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();
		this->Show_Emp();
	}

}

//清空文件
void WorkerManager::Clean_File()
{
	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)
		{
			//删除堆区的每个职工对象
			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");
}

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

employee.h

#pragma once
#includeusing namespace std;
#include#include"worker.h"

class Employee :public Worker
{
public:

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

	virtual void showInfo();

	virtual string getDeptName();
};

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.h

#pragma once
#includeusing namespace std;
#include#include"worker.h"


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

	virtual void showInfo();

	virtual string getDeptName();
};

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.h

#pragma once
#pragma once
#includeusing namespace std;
#include#include"worker.h"


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

	virtual void showInfo();

	virtual string getDeptName();
};

boss.cpp

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：管理公司所有事物"<< endl;
}

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

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