Project requirements
The employee management system can be used to manage the information of all employees in the company
Employees in the company are divided into three categories: ordinary employees, managers, and bosses. When displaying information, the employee number, employee name, employee position, and responsibilities need to be displayed.
-
General employee responsibilities: Complete tasks assigned by the manager
-
Manager Responsibilities: Complete tasks assigned by the boss and assign tasks to employees
-
Boss Responsibilities: Manage all affairs of the company
The functions that need to be implemented in the management system are as follows:
- Exit management program: Exit the current management system
- Add employee information: implement the function of adding employees in batches and enter the information into the file. The employee information is: employee number, name, department number
- Display employee information: display information about all employees within the company
- Delete resigned employees: Delete specified employees according to number
- Modify employee information: Modify employee personal information according to number
- Search for employee information: Search for relevant personnel information based on employee number or employee name
- Sort by number: Sort by employee number. The sorting rules are specified by the user.
- Clear all documents: Clear all employee information recorded in the file (need to confirm again before clearing to prevent accidental deletion)
analysis design
1. Create management class
The management class is responsible for the following content: (app.c/app.h)
- Communication menu interface with users
- Operations on adding, deleting, modifying and checking employees
- Reading and writing interactions with files
2. Create employee class
The classification of employees is: ordinary employees, managers, bosses (employee, manager, boss)
Abstract three types of workers into one class (worker) and use polymorphism to manage different worker types
The attributes of employees are: employee number, employee name, employee department number
The employee's behavior is: description of job responsibilities information, obtain job name
3. Execute files
Create an object of the management class and call the methods inside to implement the requirements
4. Precautions
Prevent the code from crashing if the data type input to cin is incorrect.
cout << "Please enter your choice:" << endl;
cin >> n;
//Prevent input of wrong data type, resulting in infinite loop
int flag = 0;
while (cin.fail()) { if (flag == 0) cout << "Please enter the correct data type" << endl; cin.clear(); cin.ignore(); cin > > n; flag++; }
Source code
Employee management system.cpp
#include <iostream>
#include "app.h"
using namespace std;
int main() {
app app;
int n;
while (true) {
app.showMenu();
cout << "请输入您的选择：" << endl;
cin >> n;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> n;
flag++;
}
switch (n) {
case 0: //退出系统
app.exitSystem();
break;
case 1: //添加职工
app.addWorker();
break;
case 2: //显示职工
app.showWorker();
break;
case 3: //删除职工
app.delWorker();
break;
case 4: //修改职工
app.changeWorker();
break;
case 5: //查找职工
app.findWorker();
break;
case 6: //排序职工
app.sortWorker();
break;
case 7: //清空文件
app.clearFile();
break;
default:
system("cls");
break;
}
}
return 0;
}
app.cpp
#include "app.h"
app::app()
{
ifstream ifs(FILENAME, ios::in);
//判断文件是否存在
if (!ifs.is_open()) {
cout << "文件不存在" << endl;
this->workerNum = 0;
this->workerArray = NULL;
this->isEmpty = true;
ifs.close();
return;
}
//存在，是否为空
char ch;
ifs >> ch;
if (ifs.eof()) {
cout << "文件为空" << endl;
this->workerNum = 0;
this->workerArray = NULL;
this->isEmpty = true;
ifs.close();
return;
}
//存在，且不为空
int num = this->getFilewWorkerNum();
this->workerNum = num;
//测试代码
//cout << "职工人数为：" << num << endl;
this->workerArray = new worker * [this->workerNum];//开辟空间
this->initWorker();//将文件中的数据，存到数组中
//测试代码
//for (int i = 0; i < workerNum; i++)
//{
// cout << "职工号： " << this->workerArray[i]->getId()
// << " 职工姓名： " << this->workerArray[i]->getName()
// << " 部门： " << this->workerArray[i]->getDeptName() << endl;
//}
}
app::~app()
{
}
/*
* @brief 显示菜单
* @param 无
* @return 无
*/
void app::showMenu() {
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;
}
/*
* @brief 退出系统
* @param 无
* @return 无
*/
void app::exitSystem() {
cout << "欢迎下次使用" << endl;
system("pause");
exit(0);
}
/*
* @brief 添加职工
* @param 无
* @return 无
*/
void app::addWorker() {
int addNum = 0;//添加职工数量
cout << "请输入要添加的职工数量：" << endl;
cin >> addNum;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> addNum;
flag++;
}
if (addNum > 0) {
int newSize = this->workerNum + addNum;//计算新空间大小
worker** newSpace = new worker * [newSize];//开辟新空间
//将原空间下数据存放到新空间下
if (this->workerArray != NULL) {
for (int i = 0; i < this->workerNum; i++) {
newSpace[i] = this->workerArray[i];
}
}
//添加新数据
for (int i = 0; i < addNum; i++) {
int id;
string name;
int deptId;
cout << "请输入第" << i + 1 << "个新职工编号：" << endl;
cin >> id;
//防止输入错误数据类型，导致死循环
flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> id;
flag++;
}
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;
worker* worker = NULL;
//死循环，防止输入错误信息
while (true) {
cin >> deptId;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> deptId;
flag++;
}
switch (deptId)
{
case 1://员工
worker = new employee(id, name, deptId);
break;
case 2://经理
worker = new manager(id, name, deptId);
break;
case 3://老板
worker = new boss(id, name, deptId);
break;
default:
cout << "输入有误，请重新输入" << endl;
continue;
}
break;
}
//将创建的职工指针存放到数组中
//该方法会提示缓冲区溢出，不过不影响程序执行，可以换成下面的语句解决
//newSpace[this->workerNum + i] = worker;
*(newSpace + this->workerNum + i) = worker;
}
delete[] this->workerArray;//释放原有空间
this->workerArray = newSpace;//更改新空间的指向
this->workerNum = newSize;//更新新的职工人数
this->isEmpty = false;//更新文件状态
cout << "成功添加" << addNum << "名新职工！" << endl;//提示信息
this->saveFile();//保存数据到文件中
}
else {
cout << "输入数据有误！" << endl;
}
system("pause");
system("cls");
}
/*
* @brief 保存文件
* @param 无
* @return 无
*/
void app::saveFile() {
ofstream ofs(FILENAME, ios::out);//创建输出流对象
//将每个人的数据写入到文件中
for (int i = 0; i < this->workerNum; i++) {
ofs << this->workerArray[i]->getId() << " "
<< this->workerArray[i]->getName() << " "
<< this->workerArray[i]->getDeptId() << endl;
}
ofs.close();//关闭文件
}
/*
* @brief 获取文件中的职工人数
* @param 无
* @return 文件中的职工人数
*/
int app::getFilewWorkerNum() {
ifstream ifs(FILENAME, ios::in);//创建输入流对象
int id;
string name;
int deptId;
int num = 0;
//统计人数
while (ifs >> id && ifs >> name && ifs >> deptId) {
num++;
}
ifs.close();//关闭文件
return num;
}
/*
* @brief 初始化职工
* @param 无
* @return 无
*/
void app::initWorker() {
ifstream ifs(FILENAME, ios::in);//创建输入流对象
int id;
string name;
int deptId;
int index = 0;
while (ifs >> id && ifs >> name && ifs >> deptId) {
worker* worker = NULL;
if (deptId == 1) {
//普通员工
worker = new employee(id, name, deptId);
}
else if (deptId == 2) {
//经理
worker = new manager(id, name, deptId);
}
else {
//老板
worker = new boss(id, name, deptId);
}
this->workerArray[index] = worker;
index++;
}
ifs.close();
}
/*
* @brief 显示职工
* @param 无
* @return 无
*/
void app::showWorker() {
if (this->isEmpty) {
cout << "文件不存在或记录为空！" << endl;
}
else {
for (int i = 0; i < this->workerNum; i++) {
this->workerArray[i]->showInfo();
}
}
system("pause");
system("cls");
}
/*
* @brief 删除职工
* @param 无
* @return 无
*/
void app::delWorker() {
if (this->isEmpty) {
cout << "文件不存在或记录为空！" << endl;
}
else {
cout << "请输入要删除的职工编号：" << endl;
int id;
cin >> id;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> id;
flag++;
}
//查找职工是否存在
int index = this->checkWorkerExist(id);
if (index != -1) {
for (int i = index; i < this->workerNum - 1; i++) {
//数据前移
this->workerArray[i] = this->workerArray[i + 1];
}
this->workerNum--;//更新数组中记录人员个数
this->saveFile();//更新文件中的人员信息
cout << "删除成功！" << endl;
}
else {
cout << "删除失败，未找到该职工！" << endl;
}
}
system("pause");
system("cls");
}
/*
* @brief 检测职工是否存在
* @param 职工编号
* @return 职工所在数组中的位置，不存在返回-1
*/
int app::checkWorkerExist(int id) {
int index = -1;
for (int i = 0; i < this->workerNum; i++) {
if (this->workerArray[i]->getId() == id) {
index = i;
break;
}
}
return index;
}
/*
* @brief 修改职工
* @param 无
* @return 无
*/
void app::changeWorker() {
if (this->isEmpty) {
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;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> id;
flag++;
}
//查找职工是否存在
int index = this->checkWorkerExist(id);
if (index == -1) {
cout << "修改失败，查无此人" << endl;
}
else {
delete this->workerArray[index];//删除原有职工
int newId = 0;
string newName = "";
int newDeptId = 0;
cout << "查到：" << id << "号职工" << endl;
cout << "请输入新的职工号：" << endl;
cin >> newId;
//防止输入错误数据类型，导致死循环
flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> newId;
flag++;
}
cout << "请输入新的姓名：" << endl;
cin >> newName;
cout << "请输入新的部门：" << endl;
cout << "1、普通员工" << endl;
cout << "2、经理" << endl;
cout << "3、老板" << endl;
worker* worker = NULL;
//死循环，防止输入错误信息
while (true) {
cin >> newDeptId;
//防止输入错误数据类型，导致死循环
flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> newDeptId;
flag++;
}
switch (newDeptId)
{
case 1://员工
worker = new employee(newId, newName, newDeptId);
break;
case 2://经理
worker = new manager(newId, newName, newDeptId);
break;
case 3://老板
worker = new boss(newId, newName, newDeptId);
break;
default:
cout << "输入有误，请重新输入" << endl;
continue;
}
break;
}
this->workerArray[index] = worker;//保存新的职工信息
cout << "修改成功！" << endl;
this->saveFile();//更新文件中的职工信息
}
}
system("pause");
system("cls");
}
/*
* @brief 查找职工
* @param 无
* @return 无
*/
void app::findWorker() {
if (this->isEmpty) {
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;
while (true) {
cin >> select;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> select;
flag++;
}
if (select == 1) {
//按职工编号查找
cout << "请输入要查找的职工编号：" << endl;
int id;
cin >> id;
//防止输入错误数据类型，导致死循环
flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> id;
flag++;
}
int index = this->checkWorkerExist(id);
if (index != -1) {
cout << "查找成功！该职工信息如下：" << endl;
this->workerArray[index]->showInfo();
}
else {
cout << "查无此人！" << endl;
}
break;
}
else if (select == 2) {
//按姓名查找
cout << "请输入要查找的姓名：" << endl;
string name;
cin >> name;
bool flag = false;//标志是否查到
for (int i = 0; i < this->workerNum; i++) {
if (this->workerArray[i]->getName() == name) {
cout << "查找成功！该职工信息如下：" << endl;
this->workerArray[i]->showInfo();
flag = true;
}
}
if (flag == false) {
cout << "查无此人！" << endl;
}
break;
}
else {
cout << "输入有误，请重新输入" << endl;
continue;
}
}
}
system("pause");
system("cls");
}
/*
* @brief 排序职工
* @param 无
* @return 无
*/
void app::sortWorker() {
if (this->isEmpty) {
cout << "文件不存在或记录为空！" << endl;
}
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;
while (true) {
cin >> select;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> select;
flag++;
}
//升序排序
if (select == 1) {
for (int i = 0; i < this->workerNum; i++) {
int min = i;
for (int j = i + 1; j < this->workerNum; j++) {
//找到最小值
if (this->workerArray[min]->getId() > this->workerArray[j]->getId()) {
min = j;
}
}
if (min != i) {
//交换位置
worker* temp = this->workerArray[min];
this->workerArray[min] = this->workerArray[i];
this->workerArray[i] = temp;
}
}
cout << "排序成功！" << endl;
this->saveFile();//更新文件中的职工信息
this->showWorker();//显示排序后的职工信息
break;
}
//降序排序
else if (select == 2) {
for (int i = 0; i < this->workerNum; i++) {
int max = i;
for (int j = i + 1; j < this->workerNum; j++) {
//找到最大值
if (this->workerArray[max]->getId() < this->workerArray[j]->getId()) {
max = j;
}
}
if (max != i) {
//交换位置
worker* temp = this->workerArray[max];
this->workerArray[max] = this->workerArray[i];
this->workerArray[i] = temp;
}
}
cout << "排序成功！" << endl;
this->saveFile();//更新文件中的职工信息
this->showWorker();//显示排序后的职工信息
break;
}
else {
cout << "输入有误，请重新输入" << endl;
continue;
}
}
}
system("pause");
system("cls");
}
/*
* @brief 清空文件
* @param 无
* @return 无
*/
void app::clearFile() {
cout << "确认清空？" << endl;
cout << "1、确认" << endl;
cout << "2、返回" << endl;
int select = 0;
while (true) {
cin >> select;
//防止输入错误数据类型，导致死循环
int flag = 0;
while (cin.fail()) {
if (flag == 0)
cout << "请输入正确的数据类型" << endl;
cin.clear();
cin.ignore();
cin >> select;
flag++;
}
if (select == 1) {
ofstream ofs(FILENAME, ios::trunc);//删除文件中的内容
ofs.close();
//删除堆区中的数据
if (this->workerArray != NULL) {
for (int i = 0; i < this->workerNum; i++) {
if (this->workerArray[i] != NULL) {
delete this->workerArray[i];
}
}
this->workerNum = 0;
delete[] this->workerArray;
this->workerArray = NULL;
this->isEmpty = true;
}
cout << "清空成功！" << endl;
break;
}
else if (select == 2) {
break;
}
else {
cout << "输入有误，请重新输入" << endl;
continue;
}
}
system("pause");
system("cls");
}
app.h
#pragma once
#include <iostream>
#include <string>
#include <fstream>
#include "worker.h"
#include "employee.h"
#include "manager.h"
#include "boss.h"
#define FILENAME "workerFile.txt"
using namespace std;
class app
{
public:
int workerNum;//职工人数
worker** workerArray;//职工数组
bool isEmpty;//标志文件是否为空
app();
~app();
void showMenu();//显示菜单
void exitSystem();//退出系统
void addWorker();//添加职工
void saveFile();//保存文件
int getFilewWorkerNum();//获取文件中的人数
void initWorker();//初始化职工
void showWorker();//显示职工
void delWorker();//删除职工
int checkWorkerExist(int id);//检测职工是否存在
void changeWorker();//修改职工
void findWorker();//查找职工
void sortWorker();//排序职工
void clearFile();//清空文件
};
worker.cpp
#include "worker.h"
void worker::setId(int id) {
this->id = id;
}
int worker::getId() {
return this->id;
}
void worker::setName(string name) {
this->name = name;
}
string worker::getName() {
return this->name;
}
void worker::setDeptId(int deptId) {
this->deptId = deptId;
}
int worker::getDeptId() {
return this->deptId;
}
worker.h
#pragma once
#include <iostream>
using namespace std;
class worker
{
private:
int id; //职工编号
string name; //职工姓名
int deptId; //职工所在部门名称编号
public:
//构造函数
void setId(int id);
int getId();
void setName(string name);
string getName();
void setDeptId(int deptId);
int getDeptId();
virtual void showInfo() = 0; //显示个人信息
virtual string getDeptName() = 0; //获取岗位名称
};
employ.cpp
#include "employee.h"
employee::employee(int id, string name, int deptId) {
this->setId(id);
this->setName(name);
this->setDeptId(deptId);
}
string employee::getDeptName() {
return string("员工");
}
void employee::showInfo() {
cout << "职工编号：" << this->getId()
<< "\t职工姓名：" << this->getName()
<< "\t岗位：" << this->getDeptName()
<< "\t岗位职责：完成经理交给的任务" << endl;
}
employ.h
#pragma once
#include "worker.h"
class employee : public worker
{
public:
//构造函数，初始化信息
employee(int id, string name, int deptId);
//显示个人信息
void showInfo();
//获取岗位名称
string getDeptName();
};
manager.cpp
#include "manager.h"
manager::manager(int id, string name, int deptId) {
this->setId(id);
this->setName(name);
this->setDeptId(deptId);
}
string manager::getDeptName() {
return string("经理");
}
void manager::showInfo() {
cout << "职工编号：" << this->getId()
<< "\t职工姓名：" << this->getName()
<< "\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;
}
manager.h
#pragma once
#include "worker.h"
class manager : public worker
{
public:
manager(int id, string name, int deptId);
void showInfo();
string getDeptName();
};
boss.cpp
#include "boss.h"
boss::boss(int id, string name, int deptId) {
this->setId(id);
this->setName(name);
this->setDeptId(deptId);
}
string boss::getDeptName() {
return string("老板");
}
void boss::showInfo() {
cout << "职工编号：" << this->getId()
<< "\t职工姓名：" << this->getName()
<< "\t岗位：" << this->getDeptName()
<< "\t岗位职责：公司管理" << endl;
}
boss.h
#pragma once
#include "worker.h"
class boss : public worker
{
public:
boss(int id, string name, int deptId);
void showInfo();
string getDeptName();
};