C++实现员工信息管理系统

using namespace std;

#include <iostream>
#include <stdio.h>
#include <string.h>

/**
 * 员工信息结构体
 */
struct career {
	char id[10];
	char name[10];
	char sex[2];
	int age;
	char position[20];
};

/**
 * 员工链表元素
 */
class link {
public:
	career data;
	link *next;
};

// 链头
link *p;

/**
 * 操作提示
 */
void showOperations();

/**
 * 新建信息
 */
void enter();

/**
 * 删除信息
 */
void deleteCareer(link *q, char a[]);

/**
 * 根据姓名修改信息
 */
void modify(link *q, char a[]);

/**
 * 根据职位查询信息
 */
void search(link *q, char sc[12]);

/**
 * 显示所有信息
 */
void showAll();

/**
 * 保存信息到磁盘
 */
void save();

/**
 * 读取已有信息到链表
 */
link *read();

/**
 * 处理各种操作
 */
void dealWithEvents();

/**
 * 主函数
 */
int main(){
	showOperations();
	p = new link();
	p = read();
	dealWithEvents();
	return 0;
}

void showOperations(){
	cout
			<< "********************************************************************************"
			<< "\n";
	cout << "1  " << "新建员工" << "\t";
	cout << "2  " << "根据姓名删除员工" << "\t";
	cout << "3  " << "根据姓名修改员工" << "\t";
	cout << "4  " << "根据职位查询员工" << "\n";
	cout << "5  " << "查询全体员工信息" << "\t";
	cout << "6  " << "存档" << "\t";
	cout << "7  " << "退出程序" << "\t";
	cout << "8  " << "帮助" << "\n";
	cout
			<< "********************************************************************************"
			<< "\n";
}

void enter()
{
	link *s;
	s = new link;
	cout << "请输入员工信息：\n 员工号 " << " 姓名 " << " 性别 " << " 年龄 " << " 职位 ";
	cin >> s->data.id;
	cin >> s->data.name;
	cin >> s->data.sex;
	cin >> s->data.age;
	cin >> s->data.position;
	s->next = p->next;
	p->next = s;
}
void deleteCareer(link *q, char a[])
{
	link *r, *t;//link *r,*ss;
	t = q;
	r = q->next;

	if (r == NULL) {
		cout << "员工信息为空\n";
		return;
	}
	while ((r != NULL) && (strcmp(r->data.name, a) != 0)) {
		t = r;
		r = r->next;
	}
	if (r == NULL)
		cout << "员工姓名不存在" << "\n";
	else {
		t->next = r->next;
		delete (r);
		cout << "此员工 \"" << a << "\"被删除" << "\n";
	}
}
void modify(link *q, char a[])
{
	link *r;
	r = q->next;
	while ((r != NULL) && (strcmp(r->data.name, a) != 0))
		r = r->next;
	if (r == NULL)
		cout << "员工名不存在" << "\n";
	else {
		cout << "请输入新的员工信息： \n 员工号  " << " 姓名 " << " 性别 " << " 年龄 " << " 职位 \n";
		cin >> r->data.id;
		cin >> r->data.name;
		cin >> r->data.sex;
		cin >> r->data.age;
		cin >> r->data.position;
	}

}
void search(link *q, char sc[12]) {
	link *r;
	r = q->next;
	if (r == NULL) {
		cout << "职位不存在";
		return;
	}
	cout << "员工号" << "\t";
	cout << "姓名" << "\t";
	cout << "性别" << "\t";
	cout << "年龄" << "\t";
	cout << "职位" << "\n";
	while (r != NULL) {
		if (strcmp(r->data.position, sc) == 0) {
			cout << r->data.id << "\t";
			cout << r->data.name << "\t";
			cout << r->data.sex << "\t";
			cout << r->data.age << "\t";
			cout << r->data.position << "\n";
		}
		r = r->next;
	}
}
void showAll() {
	link *q;
	q = p->next;
	if (q == NULL) {
		cout << "无任何员工信息" << "\n";
		return;
	}
	cout << "员工号" << "\t";
	cout << "姓名" << "\t";
	cout << "性别" << "\t";
	cout << "年龄" << "\t";
	cout << "职位" << "\n";
	while (q != NULL) {
		cout << q->data.id << "\t";
		cout << q->data.name << "\t";
		cout << q->data.sex << "\t";
		cout << q->data.age << "\t";
		cout << q->data.position << "\n";
		q = q->next;
	}
}
link *read()
{
	FILE *fp;
	link *s, *q;
	q = new link;
	q->next = NULL;
	career e;
	if ((fp = fopen("career_list.txt", "rb")) == NULL) {
		cout << "信息读取失败\n";
		return q;
	}
	while (fread(&e, sizeof(struct career), 1, fp) == 1)

	{
		s = new link;
		s->data = e;
		s->next = q->next;
		q->next = s;
	}

	fclose(fp);
	return q;
}
void dealWithEvents() {
	char a[10];
	int s;

	for (;;) {
		cout << "请选择操作(1-7):\n ";
		cin >> s;
		switch (s) {
		case 1:
			enter();
			break;
		case 2:
			cout << "请输入要删除的员工姓名:" << "\n";
			cin >> a;
			deleteCareer(p, a);
			break;
		case 3:
			cout << "请输入要修改的员工姓名:" << "\n";
			cin >> a;
			modify(p, a);
			break;

		case 4:
			cout << "请输入要查询的职位:" << "\n";
			cin >> a;
			search(p, a);
			break;
		case 5:
			showAll();
			break;
		case 6:
			save();
			break;
		case 7:
			return;
		case 8:
			showOperations();
			break;
		}
	}
}

void save() {
	career qq;
	link *r;
	FILE *fp;
	r = p->next;
	if ((fp = fopen("career_list.txt", "wb")) == NULL) {
		cout << "信息读取失败";
		return;
	}
	while (r != NULL) {
		qq = r->data;
		fwrite(&qq, sizeof(struct career), 1, fp);
		r = r->next;
	}
	cout << "存档完成" << "\n";
	fclose(fp);
}