根据视频打了一遍代码
主要利用C++来实现一个基于多态的职工管理系统
公司中职工分为三类:普通员工,经理,老板。
显示信息时,需要显示职工编号、职工姓名、职工岗位、以及职责
普通员工职责:完成经理交给的任务
经理职责:完成老板交给的任务,并下发任务给员工
老板职责:管理公司所有事务
管理系统中需要实现的功能如下:
//worker.h
#pragma once //防止头文件重复包含
#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_deptip; //职工所在部门名称编号
};
//employee.h
#pragma once //防止头文件重复包含
#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
virtual void showinfo();
//获取职工岗位名称
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_deptip = 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");
}
//manage.h
#pragma once //防止头文件重复包含
#include
using namespace std;
#include"worker.h"
//创建经理类
class manage :public worker
{
public:
//构造函数
manage(int id, string name, int did);
//显示个人信息
virtual void showinfo();
//获取职工岗位名称
virtual string getdeptname();
};
//manage.cpp
#include "manage.h"
manage::manage(int id, string name, int did) //初始化
{
this->m_id = id;
this->m_name = name;
this->m_deptip = did;
}
void manage::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 manage::getdeptname()
{
return string("经理");
}
//boss.h
#pragma once //防止头文件重复包含
#include
using namespace std;
#include "worker.h"
class boss : public worker //继承
{
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
#include "boss.h"
boss::boss(int id, string name, int did)
{
this->m_id = id;
this->m_name = name;
this->m_deptip = 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:管理公司所有事务" << endl;
}
string boss::getdeptname()
{
return string("老板");
}
//main.cpp
#include
using namespace std;
#include"workerManager.h"
#include
int main()
{
//创建对象
workerManager wm;
int choice = -1; //菜单选择
while ( true ) //会一直循环
{
//展示菜单
wm.show_menu();
cout << "请输入您的选择:" << endl;
cin >> choice;
switch (choice)
{
case 0: wm.exit_system(); //退出系统
break;
case 1: wm.add_emp(); //增加职工信息
break;
case 2: wm.show_emp(); //显示职工信息
break;
case 3: wm.del_emp(); //删除离职职工
break;
case 4: wm.mod_emp(); //修改职工信息
break;
case 5: wm.Find_emp(); //查找职工信息
break;
case 6: wm.sort_emp(); //排序职工
break;
case 7: wm.clean_file(); //清空所有文档
break;
default:
system("cls"); //清屏操作
break;
}
}
system("pause");
return 0;
}
#pragma once //防止头文件重复包含
#include //包含输入输出流头文件
using namespace std;
#include"worker.h"
#include"employee.h"
#include"manage.h"
#include"boss.h"
#include //文件操作需要的头文件
#define FILENAME "empfile.txt" //宏定义文件名
#include
#include
class workerManager
{
public:
//构造函数
workerManager();
//菜单
void show_menu();
//退出系统
void exit_system();
//增加职工employee
void add_emp();
//保存文件
void save();
//初始化员工
void init_emp();
//统计人数
int get_empnum();
//显示职工
void show_emp();
//删除职工
void del_emp();
//判断职工是否存在(按照职工编号),若存在返回职工在数组中位置,不存在返回-1
int IsExit(int id);
//修改职工
void mod_emp();
//查找职工
void Find_emp();
//职工排序
void sort_emp();
//清空文件
void clean_file();
//析构函数
~workerManager();
//记录职工的人数
int m_empnum;
//员工数组的指针
worker** m_emparray;
//判断文件是否为空
bool m_FileIsEmpty;
};
#include"workerManager.h"
workerManager::workerManager()
{
ifstream ifs;
ifs.open(FILENAME, ios::in); //读文件
//1.文件不存在情况
if(!ifs.is_open())
{
cout<<"文件不存在"<<endl; //测试输出
this->m_empnum = 0; //初始化人数
this->m_FileIsEmpty = true; //初始文件为空标志
this->m_emparray = NULL; //初始化数据
ifs.close(); //关闭文件
return;
}
//2.文件存在,并且没有记录
char ch;
ifs>>ch;
if(ifs.eof()) //end of file 判断文件为空或检测文件的结束
{
cout<<"文件为空 !"<<endl;
this->m_emparray = NULL;
this->m_empnum = 0;
this->m_FileIsEmpty = true;
ifs.close();
return;
}
//3.文件存在,并且记录数据
int num = this->get_empnum();
cout << "职工人数为: " << num << endl;
this->m_empnum = num; //更新成员属性
//开辟空间
this->m_emparray = new worker *[this->m_empnum];
//将文件中的数据,存在数组中
this->init_emp();
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_deptip <<" " << endl;
}
ifs.close();
this->m_FileIsEmpty = false;
}
//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;
}
//退出系统
void workerManager::exit_system()
{
cout << "欢迎下次使用" << endl;
exit(0); //退出系统
}
//增加职工
void workerManager::add_emp()
{
cout << "请输入添加职工数量:" << endl;
int addnum = 0; //用户的输入数量
cin >> addnum;
if (addnum > 0)
{
//添加
//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];
//将原来空间下的数据,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];
}
}
//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 manage(id, name, 2); break;
case 3:
worker = new boss(id, name, 3); break;
default:
break;
}
//当创建职工职责,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;
//提示添加成功
cout << "成功添加" << addnum << "名新职工!" << endl;
//保存到文件中
this->save();
}
else {
cout << "输入数据有误" << endl;
}
//按任意键后,清屏回到上级目录
system("pause");
system("cls");
}
//保存文件
void workerManager::save()
{
ofstream ofs;
ofs.open(FILENAME, ios::out);
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_deptip << endl;
}
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; //数组的索引位置
while(ifs>>id&&ifs >> name && ifs>>did )
{
worker *worker = NULL; //创建一个父指针
//根据不同的部门id创建不同对象
if(did == 1)//1.普通员工
{
worker = new employee(id , name, did);
}else if (did == 2)//2.经理
{
worker = new manage(id, name, did);
}else //3.老板
{
worker = new boss(id, name, did);
}
//存放在数组中
this->m_emparray[index] = worker;
index++;
}
//关闭文件
ifs.close();
}
//统计人数
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)
{
//记录人数
num++;
}
ifs.close();
return num;
}
//显示职工
void workerManager::show_emp()
{
//判断文件是否为空
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++)
{
//利用多态调用接口
this->m_emparray[i]->showinfo();
}
}
system("pause");
system("cls");
}
//判断职工是否存在
int workerManager::IsExit(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;
}
//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->IsExit(id);
if(index != -1) //说明职工存在并且要删除掉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;
}
}
//按任意键 清屏
system("pause");
system("cls");
}
void workerManager::mod_emp()
{
if(this->m_FileIsEmpty)
{
cout << "文件不存在或记录为空!" << endl;
}else{
cout << "请输入修改职工的编号:" << endl;
int id;
cin >> id;
int ret = this->IsExit(id);
if(ret != -1)
{
//查找到该编号员工
delete this->m_emparray[ret];
int newid = 0;
string newname = " ";
int newdid = 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.普通员工" << endl;
cout << "2.经理" << endl;
cout << "3.老板" << endl;
cin >> newdid;
worker *worker = NULL;
switch(newdid)
{
case1:
worker = new employee(newid, newname, newdid);
break;
case 2:
worker = new manage(newid, newname, newdid);
break;
case 3:
worker = new boss(newid, newname, newdid);
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");
}
//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、按职工编号查找 " << endl;
cout << "2、按姓名查找" << endl;
int select = 0;
cin >> select;
if(select ==1) //按职工号查找
{
int id;
cout << "请输入要查找的职工编号:" << endl;
cin >> id;
int ret = IsExit(id);
if(ret != -1)
{
cout << "查找成功!该职工信息如下:" << endl;
this->m_emparray[ret]->showinfo();
}
}
if(select == 2) // 按姓名查找
{
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(this->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");
}
//职工排序
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;
//选择排序
for (int i = 0; i < m_empnum; i++)
{
int minormax = i;
for (int j = 1 + i; 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();
}
}
//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)
{
//打开模式 ios::trunc 如果存在删除文件并重新创建
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++)
{
if(this->m_emparray[i] != NULL)
{
delete this->m_emparray[i];
}
}
this->m_empnum = 0;
//删除堆区的数组指针
delete[] this->m_emparray;
this->m_emparray = NULL;
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;
}