实现员工类：Boss、Employee、Manager，都实现抽象类Worker
worker.h头文件：
#pragma once
#include<iostream>
#include<string>
using namespace std;
//职工抽象基类
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; //职工所在部门名称编号
};
老板类boss.h头文件
#pragma once
#include<iostream>
using namespace std;
#include "worker.h"
//老板类
class Boss :public Worker
{
public:
Boss(int id, string name, int dId);
//显示个人信息
void showInfo();
//获取职工岗位名称
string getDeptName();
};
Boss.cpp文件的实现
#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
<< " 职工姓名： " << this->m_Name
<< " 岗位：" << this->getDeptName()
<< " 岗位职责：管理公司所有事务" << endl;
}
string Boss::getDeptName()
{
return string("总裁");
}
员工类employee.h头文件
#pragma once
#include<iostream>
using namespace std;
#include "worker.h"
//员工类
class Employee :public Worker
{
public:
//构造函数
Employee(int id, string name, int dId);
//显示个人信息
void showInfo();
//获取职工岗位名称
string getDeptName();
};
employee.cpp文件的实现：
#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
<< " 职工姓名： " << this->m_Name
<< " 岗位：" << this->getDeptName()
<< " 岗位职责：完成经理交给的任务" << endl;
}
string Employee::getDeptName()
{
return string("员工");
}
经理类manager.h头文件
#pragma once
#include<iostream>
using namespace std;
#include "worker.h"
//经理类
class Manager :public Worker
{
public:
Manager(int id, string name, int dId);
//显示个人信息
void showInfo();
//获取职工岗位名称
string getDeptName();
};
manager.cpp文件的实现：
#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
<< " 职工姓名： " << this->m_Name
<< " 岗位：" << this->getDeptName()
<< " 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");
}
workManager.h头文件：进行函数的申明
#pragma once
#include <iostream>
#include "worker.h"
#include "employee.h"
#include "manager.h"
#include "boss.h"
using namespace std;
// .h文件进行声明，相应的cpp文件进行定义
class workManager {
public:
int m_Num; //记录文件的人数
Worker ** worker_array; //放置对象的指针
bool fileExist; //判断文件是否存在
workManager(); //构造函数
~workManager(); //析构函数
void Show_Menu(); //展示菜单
void Show_Exit(); //关闭程序功能
void Add_Worker(); //添加员工职位
void fileSave(); //用来保存员工
int getNum(); //统计文本中人数的个数
void to_init(); //如果文本中有内容就需要相应的进行读取文本初始化操作
void to_show(); //展示文本中的信息
void to_del(); //删除职工信息
int to_exist(int bh);//判断相应的职工编号是否存在 返回值为int
void to_modify(); //修改指定员工编号操作
void to_find(); //查找指定员工编号职工信息
void to_sort(); //进行员工的排序，升序或者降序
void to_clear(); //清空文本
};
workManager.cpp进行.h文件中函数的实现
#include "workManager.h" //直接包含一个头文件，在workManager.h的头文件中已经包含了另外三个员工类的头文件
#include<fstream>
#define FILENAME "worker.txt"
workManager::workManager() {
this->m_Num = 0; //初始化数量为0
this->worker_array = NULL; //初始化指针为NULL
//初始化进行读取文件
//1、第一种情况，文件不存在
ifstream ifs;
ifs.open(FILENAME, ios::in);
if (!ifs.is_open()) {
cout << "文件不存在" << endl;
this->fileExist = true; //文件存在的标识符
this->m_Num = 0;
this->worker_array = NULL;
ifs.close();
return; //跳出构造函数
}
//2、第二种情况，文件存在，但是内容为空
char ch;
ifs >> ch; //读取一个字节来进行判断是否为空
if (ifs.eof()) {
cout << "文件为空" << endl;
this->fileExist = true; //文件存在的标识符
this->m_Num = 0;
this->worker_array = NULL;
ifs.close();
return; //跳出构造函数
}
//3、第三种情况，文件存在，内容存在，那么我们就需要读取出来并且生成相应的空间写入到程序中
int num = this->getNum(); //获取初始化的时候文本中的个数
cout << "当前职工人数有 " << num << "人" << endl;
this->m_Num = num; // 对m_Num进行更新人数
this->worker_array = new Worker*[m_Num];//在初始化之前我们需要分配给worker_array相应的内存空间进行储存，因为worker_array是指向指针的指针所以我们生成的空间为指针类型
this->to_init(); //进行相应的初始化操作
}
void workManager::to_show() { //实现显示职工信息的功能
if (this->fileExist == true) { // //如果文件不存在或者文本中无内容则提示,这里我们可以利用到标识符fileExist
cout << "文件不存在或者内容为空" << endl;
}else {
//如果文件存在并且存在内容的情况下
for (int i = 0; i < this->m_Num; i++) {
this->worker_array[i]->showInfo();
}
}
system("pause");
system("cls");
}
void workManager::to_del() {
int bh;
cout << "请输入你要删除的职工编号" << endl;
cin >> bh;
int ret = this->to_exist(bh);
if (ret != -1) { //职工编号存在的处理
for (; ret < this->m_Num-1; ret++) { //m_Num编号是从0开始的 所以总共是m_Num-1数量
this->worker_array[ret] = this->worker_array[ret + 1]; //进行覆盖操作
}
this->m_Num--; //覆盖完 少了一个人数，所以要-1操作
this->fileSave(); //重新保存文件
}
else {
//职工编号不存在的处理
cout << "职工编号不存在" << endl;
}
system("pause");
system("cls");
}
void workManager::to_modify() { //修改指定员工编号操作
int bh;
string name;
int dId;
cout << "请出你要修改的职工编号" << endl;
cin >> bh;
int ret = this->to_exist(bh);
if (ret != -1) {
//先把之前的内存空间给释放掉再重新创建对象
delete this->worker_array[ret];
cout << "输入你要重新修改的职工编号" << endl;
cin >> bh;
cout << "输入你要重新修改的职工姓名" << endl;
cin >> name;
cout << "输入你要重新修改的职工岗位" << endl;
cout << "1、普通职工" << endl;
cout << "2、经理" << endl;
cout << "3、老板" << endl;
cin >> dId;
Worker * worker = NULL;
switch (dId) {
case 1:
worker = new Employee(bh, name, dId);
break;
case 2:
worker = new Manager(bh, name, dId);
break;
case 3:
worker = new Boss(bh, name, dId);
break;
}
this->worker_array[ret] = worker;
this->fileSave();
cout << "修改成功" << endl;
}else {
cout << "修改失败，查无此人" << endl;
}
system("pause");
system("cls");
}
void workManager::to_clear(){ //清空文本
cout << "你确定要清空文本吗？" << endl;
int choose;
cin >> choose;
if (choose == 1) {
//cout << "清空" << endl;
ofstream ofs(FILENAME, ios::trunc); //打开模式 ios::trunc 如果存在删除文件并重新创建
ofs.close(); //进行关闭文件流的操作
if (this->worker_array != NULL) {
for (int i = 0; i < this->m_Num; i++) {
delete this->worker_array[i]; //释放worker_array指针中指向的地址的指针的内存空间
}
//this->m_Num = 0;可有可无
delete[] this->worker_array; //释放worker_array本身数组指针的内存空间
this->worker_array = NULL;
}
cout << "清空完成" << endl;
}
else {
cout << "清空操作被取消" << endl;
return;
}
system("pause");
system("cls");
}
//排序的操作
void workManager::to_sort() {
cout << "请选择排序的顺序:" << endl;
int choose;
cout << "1、升序排序 2、降序排序" << endl;
cin >> choose;
if (choose == 1) {
//升序排序,利用的排序方法是冒泡排序
for (int i = 0; i < this->m_Num - 1; i++) {
Worker * temp = NULL; //作为一个temp的存在
for (int j = i + 1; j < this->m_Num; j++) {
if (this->worker_array[i]->m_Id < this->worker_array[j]->m_Id) {
temp = this->worker_array[i];
this->worker_array[i] = this->worker_array[j];
this->worker_array[j] = temp;
}
}
}
}else {
//降序排序
for (int i = 0; i < this->m_Num - 1; i++) {
Worker * temp = NULL; //作为一个temp的存在
for (int j = i + 1; j < this->m_Num; j++) {
if (this->worker_array[i]->m_Id > this->worker_array[j]->m_Id) {
temp = this->worker_array[i];
this->worker_array[i] = this->worker_array[j];
this->worker_array[j] = temp;
}
}
}
}
system("pause");
system("cls");
}
void workManager::to_find() {
cout << "请出你要查找的职工编号" << endl;
int bh;
cin >> bh;
int ret = this->to_exist(bh);
if (ret != -1) {
for (int i = 0; i < this->m_Num; i++) {
if (this->worker_array[i]->m_Id == bh) {
this->worker_array[i]->showInfo();
break; //如果自己还要添加一个以姓名查找的话，break就不能用了，因为要循环完才行
}
}
}else {
cout << "查找失败，查无此人" << endl;
}
system("pause");
system("cls");
}
void workManager::to_init() { //对文本进行读取然后再加进程序中的函数to_init封装
ifstream ifs;
ifs.open(FILENAME,ios::in);
int id, dId;
string name;
this->fileExist = false;
int index = 0;//计数
while (ifs >> id && ifs >> name && ifs >> dId) { //获取文本的内容
Worker * worker = NULL; //指针清空初始化
if (dId == 1) {
worker = new Employee(id, name, dId);
}
else if (dId == 2) {
worker = new Manager(id, name, dId);
}
else if (dId == 3) {
worker = new Boss(id, name, dId);
}
this->worker_array[index] = worker; //worker_array为指向worker指针的指针
index++;
}
}
int workManager::getNum() {
ifstream ifs;
ifs.open(FILENAME, ios::in);
int id, dId;
string name;
int num = 0;
while (ifs >> id && ifs >> name && ifs >> dId) {
num++;
}
ifs.close();
return num;
}
workManager::~workManager() {
}
void workManager::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;
}
//展示菜单栏
void workManager::Show_Exit() {
cout << "欢迎下次使用" << endl;
system("pause");
exit(0);
}
//判断相应的职工编号是否存在 返回值为int
int workManager::to_exist(int bh) { //传入的参数为编号
for (int i = 0; i < this->m_Num; i++) {
if (this->worker_array[i]->m_Id == bh) {
return i;
break;//既然已经找到了 那么直接break跳出循环
}
}
return -1; //如果没有找到就返回为-1
}
//写入文件操作
void workManager::fileSave() { //当添加完成之后需要进行保存文件的操作
ofstream ofs;//创建写入的流对象
ofs.open(FILENAME, ios::out);
for (int i = 0; i < this->m_Num; i++) { //用m_Num来进行判断，因为m_Num中是存储的职工数量，然后进行遍历写入操作
ofs << this->worker_array[i]->m_Id << " " << this->worker_array[i]->m_Name << " " << this->worker_array[i]->m_DeptId << endl; //ofs进行写入
}
ofs.close();
}
void workManager::Add_Worker() { //这个地方最重要 也是最要学习的地方,这里的双重指针也需要理解
int add_Num;
cout << "请输入你要添加的人数："<< endl;
cin >> add_Num;
if (add_Num > 0) {
int all = this->m_Num + add_Num; //统计一共要生成的新空间的大小
Worker ** NewSpace = new Worker*[all]; //生成相应的地址空间
if (this->worker_array != NULL) { //如果不为空的话，那要把原来的数据都要先重新转移到NewSpace中，为空的话那么就直接转移
for (int i = 0; i < this->m_Num; i++) {
NewSpace[i] = this->worker_array[i];
}
}
for (int i = 0; i < add_Num; i++) {
int id, dId;
string name;
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 >> dId;
Worker * worker = NULL;
if (dId == 1) { //普通职工创建指针
NewSpace[this->m_Num + i] = new Employee(id, name, dId);
}else if (dId == 2) { //经理创建指针
NewSpace[this->m_Num + i] = new Manager(id, name, dId);
}else if (dId == 3) { //老板创建指针
NewSpace[this->m_Num + i] = new Boss(id, name, dId);
}
}
delete[] this->worker_array; //进行释放之前储存的老空间
this->worker_array = NewSpace; //把之前的旧的空间释放然后指向最新保存的地址空间
this->m_Num = all; //修改最新总共人数
cout << "添加成功" << add_Num << "新职工!" << endl;
}
else {
cout << "输入有误" << endl;
}
this->fileSave();
system("pause"); //任意键
system("cls");
}
入口文件
职工管理系统.cpp
#include<iostream>
#include<string>
#include "workManager.h"
using namespace std;
int main() {
workManager w1; //实例化对象
while (true) {
w1.Show_Menu();
int choose;
cout << "输入你要选择的选项：" << endl;
cin >> choose;
switch (choose) {
case 0: //0.退出管理程序
w1.Show_Exit();
break;
case 1: //1.增加职工信息
w1.Add_Worker();
break;
case 2: //2.显示职工信息
w1.to_show();
break;
case 3: //3.删除离职职工
w1.to_del();
break;
case 4: //4.修改职工信息
w1.to_modify();
break;
case 5: //5.查找职工信息
w1.to_find();
break;
case 6: //6.按照编号排序
w1.to_sort();
break;
case 7: //7.清空所有文档
w1.to_clear();
break;
}
}
system("pause");
return 0;
}