C++编程起步项目

zhangpeng4555479402025-05-21 15:54

员工信息管理系统

成品展示

system-analysis-and-design: 系统分析与设计成品展示

需求

Employee.h

cpp 复制代码 
#pragma once

#include<iostream>
#include<string>

using namespace std;

class Employee {
public:
	int id; // 编号
	string name; // 姓名
	string position; // 岗位
	int deptId; // 部门编号

	Employee();
	Employee(int id, string name, string position, int deptId);
	~Employee();
	virtual string responsibilities() const { return "员工职责！"; };

	void setName(string name);
};

class PuTong : public Employee {
public:
	PuTong(int id, string name, string position, int deptId);
	virtual string responsibilities() const;
};
class JingLi : public Employee {
public:
	JingLi(int id, string name, string position, int deptId);
	virtual string responsibilities() const;
};
class LaoBan : public Employee {
public:
	LaoBan(int id, string name, string position, int deptId);
	virtual string responsibilities() const;
};

Employee.cpp

cpp 复制代码 
#include"Employee.h"

void Employee::setName(string name) {
	this->name = name;
}

Employee::Employee() :id(0), name(""), position(""), deptId(0) {
}

Employee::Employee(int id, string name, string position, int deptId) {
	this->id = id;
	this->name = name;
	this->position = position;
	this->deptId = deptId;
}

Employee::~Employee() {

}

PuTong::PuTong(int id, string name, string position, int deptId) {
	this->id = id;
	this->name = name;
	this->position = position;
	this->deptId = deptId;
}
string PuTong::responsibilities() const {
	return "完成经理交给的任务.";
}

JingLi::JingLi(int id, string name, string position, int deptId) {
	this->id = id;
	this->name = name;
	this->position = position;
	this->deptId = deptId;
}
string JingLi::responsibilities() const {
	return "完成老板交给的任务，并下发任务给员工.";
}

LaoBan::LaoBan(int id, string name, string position, int deptId) {
	this->id = id;
	this->name = name;
	this->position = position;
	this->deptId = deptId;
}
string LaoBan::responsibilities() const {
	return "管理公司所有事务.";
}

EmployeeManager.cpp

cpp 复制代码 
#pragma once

#include<iostream>
#include<string>
#include<fstream>

#include "outer.h"

using namespace std;

static const int MAX_EMP_COUNT = 10;
//Employee emp[MAX_EMP_COUNT]; // 数组 类似结构体数组
Employee* emp = new Employee[MAX_EMP_COUNT]; // 动态分配的数组
Employee** p_emp = new Employee* [MAX_EMP_COUNT]; // Employee指针数组 Employee为抽象类时可以实现多态
//auto emp = make_unique<Employee[]>(MAX_EMP_COUNT);
static int emp_size = 0; // 员工数 限制emp访问区间
static const string DATA = "data.dat";

static void add_emp(Employee& e) {
	if (emp_size == MAX_EMP_COUNT) { // 扩容
		cout << "已经存满了！" << endl;
	}
	else {
		emp[emp_size] = e;
		p_emp[emp_size] = &e;
		emp_size++;
	}
}
static void print_emp(const Employee& e) {
	cout << "员工[" << e.id << "] ->"
		<< " 姓名: " << e.name
		<< " 岗位: " << e.position
		<< " 部门编号: " << e.deptId
		<< " 职责：" << e.responsibilities()
		<< endl;
}
static void print_emp(const Employee* const e) {
	cout << "员工[" << e->id << "] ->"
		<< " 姓名: " << e->name
		<< " 岗位: " << e->position
		<< " 部门编号: " << e->deptId
		<< " 职责：" << e->responsibilities()
		<< endl;
}
static void show_all_emp() {
	if (emp_size <= 0) {
		return;
	}
	cout << "所有员工信息如下：" << endl;
	for (int i = 0; i < emp_size; i++) {
		Employee e = emp[i];
		print_emp(&e);
	}
}
static Employee& search_emp(int id) {
	for (int i = 0; i < emp_size; i++) {
		if (emp[i].id == id) {
			return emp[i];
		}
	}
	cout << "没有找到" << endl;
	exit(-1);
}
static Employee& search_emp(string name) {
	for (int i = 0; i < emp_size; i++) {
		if (emp[i].name == name) {
			return emp[i];
		}
	}
	cout << "没有找到" << endl;
	exit(-1);
}
static bool del_emp(int id) {
	for (int i = 0; i < emp_size; i++) {
		if (emp[i].id == id) {
			while (i < emp_size - 1) {
				emp[i] = emp[i + 1];
				i++;
			}
			emp_size--;
			return true;
		}
	}
	return false;
}
static void modify_emp(int id, string name) {
	Employee& e = search_emp(id);
	e.name = name;
}

static void add() {
	int id; // 编号
	string name; // 姓名
	string position; // 岗位
	int deptId; // 部门编号
	while (true) {
		cout << "输入-1随时退出！" << endl;
		cout << "请输入编号：";
		cin >> id;
		if (id == -1) {
			break;
		}
		//Employee &x = search_emp(id);
		cout << "请输入姓名：";
		cin >> name;
		if (name == "-1") {
			break;
		}
		pos: cout << "请输入岗位[1:普通 2:经理 3:老板]：";
		cin >> position;
		if (position == "-1") {
			break;
		}
		Employee* e;
		if (position == "1") {
			e = new PuTong(id, name, position, 0);
		}
		else if (position == "2") {
			e = new JingLi(id, name, position, 0);
		}
		else if (position == "3") {
			e = new LaoBan(id, name, position, 0);
		}
		else {
			cout << "无效输入！" << endl;
			goto pos;
		}
		cout << "请输入部门编号：";
		cin >> deptId;
		if (deptId == -1) {
			break;
		}
		//Employee* e = new Employee(id, name, position, deptId);
		//Employee e(id, name, position, deptId);
		e->deptId = deptId; 
		add_emp(*e);
		show_all_emp();
		cout << "选择继续添加还是退出：0 表示退出，1 表示继续添加. ";
		int select;
		cin >> select;
		if (!select) {
			break;
		}
	}
}
static void del() {
	cout << "选择要删除的员工的编号：";
	int id;
	cin >> id;
	bool d = del_emp(id);
	if (d) {
		cout << "删除成功！" << endl;
	}
	else {
		cout << "删除失败！" << endl;
	}
	show_all_emp();
}
static void modify() {
	cout << "选择要修改的员工的编号：";
	int id;
	cin >> id;
	Employee &e = search_emp(id);
	cout << "修改姓名：";
	string name;
	cin >> name;
	modify_emp(id, name);
	show_all_emp();
}
static void search() {
	cout << "输入1按编号查找，输入2按姓名查找.";
	int select;
	cin >> select;
	if (select == 1) {
		int id;
		cout << "输入编号：";
		cin >> id;
		Employee &e = search_emp(id);
		cout << "查找到的员工信息如下：" << endl;
		print_emp(&e);
	} else if(select == 2) {
		string name;
		cout << "输入姓名：";
		cin >> name;
		Employee& e = search_emp(name);
		cout << "查找到的员工信息如下：" << endl;
		print_emp(&e);
	}
}
static int comp(const void *e1, const void *e2) {
	const Employee s1 = *static_cast<const Employee*>(e1);
	const Employee s2 = *static_cast<const Employee*>(e2);
	return s1.id - s2.id;
	//return ((Employee*)e1)->id - ((Employee*)e2)->id;
}
// 泛型比较方法，比较id
template<typename T>
static int comp_id(const void* e1, const void* e2) {
	const T t1 = *static_cast<const T*>(e1);
	const T t2 = *static_cast<const T*>(e2);
	return t1.id - t2.id;
}
static void sort() {
	qsort(emp, emp_size, sizeof(Employee), comp_id<Employee>);
}

static void init() {
	fstream in(DATA, ios::in);
	Employee* e = new Employee;
	while (in.read((char*)e, sizeof(Employee))) {
		emp[emp_size++] = *e;
	}

	//p_emp = new Employee* [emp_size];
	for (int i = 0; i < emp_size; i++) {
		p_emp[i] = &emp[i];
	}
	
	//int i = 0;
	//while (getline(in)) {
	//	int id, deptId;
	//	string name, position;
	//	in >> id >> name >> position >> deptId;
	//	Employee e(id, name, position, deptId);
	//	emp[i] = e;
	//}
}
static void store_file() {
	cout << "文件同步..." << endl;
	fstream out(DATA, ios::out);
	for (int i = 0; i < emp_size; i++) {
		Employee e = emp[i];
		out.write((const char*)&e, sizeof(Employee));
		//out << e.id << " "
		//	<< e.name << " "
		//	<< e.position << " "
		//	<< e.deptId
		//	<< endl;
	}
}
static void clear_file(const string name) {
	fstream out(DATA, ios::out|ios::trunc);
	out.close();
}
static void clear() {
	cout << "操作不可恢复！确定清空数据吗？" << endl;
	cout << "输入数字0取消！" << endl;
	int n;
	cin >> n;
	if (!n) {
		return;
	}

	emp_size = 0;

	delete[] emp; // 删除动态分配的数组
	emp = new Employee[MAX_EMP_COUNT];

	//emp = NULL;
	//emp = make_unique<Employee[]>(MAX_EMP_COUNT);

	clear_file(DATA);
}

static void menu() {
	cout << "================================" << endl;
	cout << "0、退出系统" << endl;
	cout << "1、增加" << endl;
	cout << "2、显示所有员工信息" << endl;
	cout << "3、删除" << endl;
	cout << "4、修改员工姓名" << endl;
	cout << "5、查找" << endl;
	cout << "6、按编号排序" << endl;
	cout << "7、清空" << endl;
	cout << "================================" << endl;
}

void start() {

	init();

	int flag = 1;
	int cls = 0;
label: while (flag) {
		show_all_emp();
		menu();
		cout << "输入要执行的操作 : ";
		int select;
		cin >> select;
		switch(select) {
		case 0:
			flag = 0;
			goto label;
		case 1:
			add();
			store_file();
			break;
		case 2:
			show_all_emp();
			break;
		case 3:
			del();
			store_file();
			break;
		case 4:
			modify();
			store_file();
			break;
		case 5:
			search();
			break;
		case 6:
			sort();
			store_file();
			system("cls");
			goto label;
		case 7:
			clear();
			break;
		default:
			cout << "无效选项" << endl;
		}
		system("pause");
		system("cls");
	}
	cout << "退出系统，欢迎使用！" << endl;
}

outer.h

cpp 复制代码 
#pragma once

#include "Employee.h"

// 员工信息管理系统
void start();

// 测试多态
void test_polymorphism();

测试多态

Worker.h

cpp 复制代码 
#pragma once

#include<string>

using namespace std;

class Worker {
public:
	int id; // 编号
	string name; // 姓名
	string position; // 岗位

	//Worker();
	//Worker(int id, string name, string position);

	virtual string showInfo() const = 0;
};

class Worker1 : public Worker {
public:
	Worker1(int id, string name, string position);
	virtual string showInfo() const;
};

class Worker2 : public Worker {
public:
	Worker2(int id, string name, string position);
	virtual string showInfo() const;
};

Worker.cpp

cpp 复制代码 
#include<string>

#include"Worker.h"

using namespace std;

Worker1::Worker1(int id, string name, string position) {
	this->id = id;
	this->name = name;
	this->position = position;
}
string Worker1::showInfo() const {
	return "完成经理交给的任务.";
}

Worker2::Worker2(int id, string name, string position) {
	this->id = id;
	this->name = name;
	this->position = position;
}
string Worker2::showInfo() const {
	return "完成老板交给的任务，并下发任务给员工.";
}

WorkerManager.cpp

cpp 复制代码 
#include<iostream>
#include<string>

#include"Worker.h"

using namespace std;

static int init_size = 1;
static Worker** worker_arry = new Worker*[init_size];
static int worker_size = 0;

static void add(Worker* w) {
	if (worker_size == init_size) {
		Worker** w_arr = new Worker * [2 * init_size];
		for (int i = 0; i < worker_size; i++) {
			w_arr[i] = worker_arry[i];
		}
		delete[] worker_arry;
		worker_arry = w_arr;
	}
	worker_arry[worker_size++] = w;
}
static void add() {
	cout << "分别输入id、name、position[1:普通、2:经理]." << endl;
	Worker* w = NULL;
	int id;
	cout << "输入id: ";
	cin >> id;
	string name;
	cout << "输入name: ";
	cin >> name;
	string position;
pos: cout << "输入position: ";
	cin >> position;
	if (position == "1") {
		w = new Worker1(id, name, position);
	}
	else if (position == "2") {
		w = new Worker2(id, name, position);
	}
	else {
		cout << "position输入有误！" << endl;
		goto pos;
	}
	add(w);
}
static void print_worker(const Worker* const w) {
	cout << "id: " << w->id
		<< " name: " << w->name
		<< " position: " << w->position
		<< " 职责: " << w->showInfo()
		<< endl;
}
static void print_worker_array() {
	for (int i = 0; i < worker_size; i++) {
		Worker* w = worker_arry[i];
		print_worker(w);
	}
}

void test_polymorphism() {
	bool flag = true;
	while (flag) {
		int s;
		cout << "输入0退出.  " << "输入1添加." << endl;
		cin >> s;
		switch (s)
		{
		case 0:
			system("pause");
			exit(1);
			//flag = false;
			//break;
		case 1:
			add();
			print_worker_array();
		default:
			break;
		}
	}
}

测试类

cpp 复制代码 
int main(int argc, char *argv[]) 
{

	// 面向对象设计
	start();
	test_polymorphism();

	return 1;
}

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