基于多态的职工管理系统

头文件#

boss.h#

#pragma once
#include <iostream>
#include "worker.h"

using namespace std;

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();
};

employee.h#

#pragma once
#include <iostream>
#include <string>
#include "worker.h"

using namespace std;

class Employee : public Worker
{
public:
	//构造函数
	Employee(int id, string name, int dId);
	//显示个人信息
	virtual void showInfo(); //子类重写父类的纯虚函数
	//获取岗位名称
	virtual string getDeptName(); //子类重写父类的纯虚函数
};

manager.h#

#pragma once
#include <iostream>
#include <string>
#include "worker.h"

using namespace std;

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();
};

worker.h#

#pragma once
#include <iostream>
#include <string>

using namespace std;

class Worker
{
public:
	int m_Id; //职工编号
	string m_Name; //职工姓名
	int m_DeptId; //部门编号

public:
	//显示个人信息
	virtual void showInfo() = 0;
	//获取岗位名称
	virtual string getDeptName() = 0;
};

WorkerManager.h#

#pragma once //防止头文件重复包含
#include <iostream>
#include "worker.h"
#include <fstream>

#define FILENAME "empFile.txt"

using namespace std;

class WorkerManager
{
public:

	//构造函数
	WorkerManager();

	//析构函数
	~WorkerManager();

	//展示菜单
	void Show_Menu();

	//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();

	//初始化员工
	void init_Emp();

	//显示职工的成员函数
	void Show_Emp();

	//删除职工
	void Del_Emp();

	//判断职工是否存在，如果存在返回所在数组中的下标，不存在则返回-1
	int Is_Exist(int id);

	//修改职工
	void Mod_Emp();

	//查找员工
	void Find_Emp();

	//按照编号排序
	void Sort_Emp();

	//清空文件
	void Clean_File();
	
	//退出系统
	void ExitSystem();

};

---

源文件#

boss.cpp#

#pragma once
#include <iostream>
#include <string>
#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：管理公司所有事务"
		<< endl;
}
//获取岗位名称
string Boss::getDeptName()
{
	return string("老板");
}

employee.cpp#

#include <iostream>
#include <string>
#include "employee.h"

using namespace std;

//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.cpp#

#pragma once
#include <iostream>
#include <string>
#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");
}

WorkerManager.cpp#

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

//构造函数
WorkerManager::WorkerManager()
{
	//1.文件不存在
	ifstream ifs;
	ifs.open(FILENAME, ios::in); //读文件
	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;
	}

	//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;
		this->m_EmpArray = NULL;
		this->m_FileIsEmpty = true;
		ifs.close();
		return;
	}

	//3.文件存在并且已经记录数据
	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
	//		<< "姓名：" << this->m_EmpArray[i]->m_Name
	//		<< "部门编号：" << this->m_EmpArray[i]->m_DeptId << endl;
	//}
}

//统计文件中的人数
int WorkerManager::get_EmpNum()
{
	ifstream ifs;
	ifs.open(FILENAME, ios::in); //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;
}

void WorkerManager::save()
{
	ofstream ofs;
	ofs.open(FILENAME, ios::out); //用输出的方式打开文件(写文件)
	
	//将每个人的数据写入文件中
	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) //普通员工
		{
			worker = new Employee(id, name, dId);
		}
		else if (dId == 2) //经理
		{
			worker = new Manager(id, name, dId);
		}
		else //老板
		{
			worker = new Boss(id, name, dId);
		}
		this->m_EmpArray[index] = worker;
		index++;
	}

	ifs.close();
}

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

//展示菜单
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;
}

//显示职工的成员函数
void WorkerManager::Show_Emp()
{
	//判断文件是否为空
	if (this->m_FileIsEmpty)
	{
		cout << "文件不存在或为空" << 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
	{
		//按照职工编号删除
		cout << "请输入想要删除的职工编号：" << endl;
		int id = 0;
		cin >> id;
		int index = this->Is_Exist(id);
		if (index != -1) //说明职工存在并且要删除index位置的职工
		{
			//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数量

			//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;
		}
	}

	//按任意键清屏
	system("pause");
	system("cls");
}

//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 << "请输入想要修改的职工编号：" << endl;
		int id;
		cin >> id;

		int ret = this->Is_Exist(id);
		if (ret != -1)
		{
			delete this->m_EmpArray[ret];

			int newId = 0;
			string newName = "";
			int dSelect = 0;
			cout << "查到：" << id << "号职工，请输入新的职工编号：" << endl;
			cin >> newId;
			cout << "请输入新的姓名：" << endl;
			cin >> newName;
			cout << "请输入新的岗位：" << 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)
			{
			case1:
				worker = new Employee(newId, newName, dSelect);
				break;
			case2:
				worker = new Manager(newId, newName, dSelect);
				break;
			case 3:
				worker = new Boss(newId, newName, dSelect);
				break;
			default:
				break;
			}

			//更改数据 到数组中
			this->m_EmpArray[ret] = worker;

			cout << "修改成功！" << endl;

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

	//按任意键 清屏
	system("pause");
	system("cls");
}

//判断职工是否存在，如果存在返回所在数组中的下标，不存在则返回-1
int WorkerManager::Is_Exist(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;
}

//查找员工
void WorkerManager::Find_Emp()
{
	if (this->m_FileIsEmpty)
	{
		cout << "文件为空或记录为空" << 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) //按照编号查
		{
			int id;
			cout << "请输入查找的职工编号：" << endl;
			cin >> id;

			int ret = this->Is_Exist(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) //按照姓名查
		{
			string name;
			cout << "请输入查找的姓名：" << endl;
			cin >> name;
			bool flag = false;  //查找到的标志
			for (int i = 0; i < m_EmpNum; i++)
			{
				if (m_EmpArray[i]->m_Name == name)
				{
					cout << "查找成功,职工编号为："
						<< m_EmpArray[i]->m_Id
						<< " 号的信息如下：" << endl;

					flag = true;

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

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

//按照编号排序
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) //升序
				{
					if (m_EmpArray[minOrMax]->m_Id > m_EmpArray[j]->m_Id)
					{
						minOrMax = j;
					}
				}
				else  //降序
				{
					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();
	}

}

//退出系统
void WorkerManager::ExitSystem()
{
	cout << "欢迎下次使用" << endl;
	system("pause");
	exit(0);
}

void WorkerManager::Add_Emp()
{
	cout << "请输入添加的职工的数量：" << 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;

		//开辟新空间
		Worker** newSpace = new Worker* [newSize];

		//将原来空间的数据拷贝到新空间
		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:
				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;
			}

			//将创建的职工职责保存到数组中
			newSpace[this->m_EmpNum + i] = worker;
		}

		//释放原有的空间
		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;

		//更新职工不为空的标志
		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 << "输入的数据有误" << endl;
	}

	//按任意键后清屏回到上级目录
	system("pause");
	system("cls");
}

//清空文件
void WorkerManager::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)
	{
		//清空文件
		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++)
			{
				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");
}

职工管理系统.cpp#

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

using namespace std;

//void test01()
//{
//	Worker* worker = NULL;
//	worker = new Employee(1, "张三", 1);
//	worker->showInfo();
//	delete worker;
//	worker = new Manager(2, "李四", 2);
//	worker->showInfo();
//	delete worker;
//	worker = new Boss(3, "王五", 3);
//	worker->showInfo();
//	delete worker;
//}

int main()
{
	//test01();

	WorkerManager wm;
	int choice = 0;
	while (true)
	{
		wm.Show_Menu();
		cout << "请输入你的选择：" << endl;
		cin >> choice;
		switch(choice)
		{
		case 0: //退出系统
			wm.ExitSystem();
			break;
		case 1: //增加职工
			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: //清空文档
			wm.Clean_File();
			break;
		default:
			system("cls"); //清屏
			break;
		}
	}

	system("pause");
	return 0;
}