假如你是大一学生，请你写一个c语言程序设计作业关于企业员工管理系统

好的，下面是一个简单的企业员工管理系统的C语言程序设计作业：

题目：企业员工管理系统

要求：

1. 实现员工信息的录入、修改、删除、查询功能；
2. 实现员工信息的打印功能，可以按照姓名、工号、职位等排序；
3. 实现员工工资的计算功能，包括基本工资、津贴、奖金等；
4. 实现员工考勤管理功能，包括请假、加班、旷工等；
5. 实现员工绩效考核功能，包括KPI、年度评估等；
6. 实现员工晋升、晋级、调整等管理功能；
7. 实现员工离职、退休、转岗等管理功能；
8. 采用文件存储方式，实现员工信息的永久保存；
9. 最好能够有图形化界面。

提示：

1. 可以采用结构体存储员工信息；
2. 可以采用链表、二叉树等数据结构实现员工信息的排序；
3. 可以采用文件读写、数据库等方式实现员工信息的永久保存；
4. 可以采用QT、MFC等框架实现图形化界面。

参考代码：

由于该企业员工管理系统比较复杂，且需要涉及到多个功能，因此这里只提供一个简单的参考代码，供大家参考：

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

#define MAX_NAME 20
#define MAX_ID 10
#define MAX_DEPARTMENT 20

// 员工结构体
typedef struct Employee {
    char name[MAX_NAME];         // 姓名
    char id[MAX_ID];             // 工号
    char department[MAX_DEPARTMENT];    // 部门
    float salary;               // 薪资
    int attendance;             // 考勤
    int performance;            // 绩效
    struct Employee *next;      // 指向下一个员工的指针
} Employee;

// 用链表存储员工信息
Employee *head = NULL;

// 打印菜单
void print_menu()
{
    printf("=====================================\n");
    printf("=               菜单                =\n");
    printf("=====================================\n");
    printf("= 1. 录入员工信息                    =\n");
    printf("= 2. 修改员工信息                    =\n");
    printf("= 3. 删除员工信息                    =\n");
    printf("= 4. 查询员工信息                    =\n");
    printf("= 5. 打印员工信息                    =\n");
    printf("= 6. 计算员工工资                    =\n");
    printf("= 7. 考勤管理                        =\n");
    printf("= 8. 绩效考核                        =\n");
    printf("= 9. 员工管理                        =\n");
    printf("= 10. 保存员工信息到文件             =\n");
    printf("= 11. 从文件中读取员工信息           =\n");
    printf("= 0. 退出                            =\n");
    printf("=====================================\n");
}

// 录入员工信息
void input_employee()
{
    Employee *new_employee = (Employee *)malloc(sizeof(Employee));
    printf("请输入员工姓名：");
    scanf("%s", new_employee->name);
    printf("请输入员工工号：");
    scanf("%s", new_employee->id);
    printf("请输入员工部门：");
    scanf("%s", new_employee->department);
    printf("请输入员工薪资：");
    scanf("%f", &new_employee->salary);
    printf("请输入员工考勤：");
    scanf("%d", &new_employee->attendance);
    printf("请输入员工绩效：");
    scanf("%d", &new_employee->performance);
    new_employee->next = NULL;
    if (head == NULL) {
        head = new_employee;
    } else {
        Employee *p = head;
        while (p->next != NULL) {
            p = p->next;
        }
        p->next = new_employee;
    }
    printf("录入成功！\n");
}

// 修改员工信息
void modify_employee()
{
    char id[MAX_ID];
    printf("请输入要修改的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            printf("请输入员工姓名：");
            scanf("%s", p->name);
            printf("请输入员工部门：");
            scanf("%s", p->department);
            printf("请输入员工薪资：");
            scanf("%f", &p->salary);
            printf("请输入员工考勤：");
            scanf("%d", &p->attendance);
            printf("请输入员工绩效：");
            scanf("%d", &p->performance);
            printf("修改成功！\n");
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 删除员工信息
void delete_employee()
{
    char id[MAX_ID];
    printf("请输入要删除的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    Employee *prev = NULL;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            if (prev == NULL) {
                head = p->next;
            } else {
                prev->next = p->next;
            }
            free(p);
            printf("删除成功！\n");
            return;
        }
        prev = p;
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 查询员工信息
void query_employee()
{
    char id[MAX_ID];
    printf("请输入要查询的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            printf("姓名：%s\n", p->name);
            printf("工号：%s\n", p->id);
            printf("部门：%s\n", p->department);
            printf("薪资：%.2f\n", p->salary);
            printf("考勤：%d\n", p->attendance);
            printf("绩效：%d\n", p->performance);
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 打印员工信息
void print_employee()
{
    Employee *p = head;
    printf("=====================================\n");
    printf("=               员工信息             =\n");
    printf("=====================================\n");
    printf("姓名\t工号\t部门\t薪资\t考勤\t绩效\n");
    while (p != NULL) {
        printf("%s\t%s\t%s\t%.2f\t%d\t%d\n", p->name, p->id, p->department, p->salary, p->attendance, p->performance);
        p = p->next;
    }
}

// 计算员工工资
void calculate_salary()
{
    char id[MAX_ID];
    printf("请输入要计算工资的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            float salary = p->salary;
            // 计算津贴
            if (strcmp(p->department, "技术部") == 0) {
                salary += 1000;
            } else if (strcmp(p->department, "市场部") == 0) {
                salary += 800;
            } else if (strcmp(p->department, "人事部") == 0) {
                salary += 500;
            }
            // 计算奖金
            if (p->attendance >= 20) {
                salary += 1000;
            }
            if (p->performance >= 90) {
                salary += 1000;
            }
            printf("员工工资为：%.2f\n", salary);
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 考勤管理
void attendance_management()
{
    char id[MAX_ID];
    printf("请输入要管理考勤的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            int attendance;
            printf("请输入考勤记录：");
            scanf("%d", &attendance);
            p->attendance = attendance;
            printf("考勤管理成功！\n");
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 绩效考核
void performance_assessment()
{
    char id[MAX_ID];
    printf("请输入要考核绩效的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            int performance;
            printf("请输入绩效记录：");
            scanf("%d", &performance);
            p->performance = performance;
            printf("绩效考核成功！\n");
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 员工管理
void employee_management()
{
    char id[MAX_ID];
    printf("请输入要管理的员工工号：");
    scanf("%s", id);
    Employee *p = head;
    while (p != NULL) {
        if (strcmp(p->id, id) == 0) {
            printf("请选择要进行的操作：\n");
            printf("1. 晋升\n");
            printf("2. 晋级\n");
            printf("3. 调整\n");
            printf("4. 离职\n");
            printf("5. 退休\n");
            int choice;
            scanf("%d", &choice);
            if (choice == 1) {
                printf("晋升成功！\n");
            } else if (choice == 2) {
                printf("晋级成功！\n");
            } else if (choice == 3) {
                printf("调整成功！\n");
            } else if (choice == 4) {
                delete_employee();
            } else if (choice == 5) {
                printf("退休成功！\n");
            } else {
                printf("无效选项！\n");
            }
            return;
        }
        p = p->next;
    }
    printf("该员工不存在！\n");
}

// 保存员工信息到文件
void save_employee()
{
    FILE *fp;
    if ((fp = fopen("employee.txt", "w")) == NULL) {
        printf("文件打开失败！\n");
        return;
    }
    Employee *p = head;
    while (p != NULL) {
        fprintf(fp, "%s %s %s %.2f %d %d\n", p->name, p->id, p->department, p->salary, p->attendance, p->performance);
        p = p->next;
    }
    fclose(fp);
    printf("员工信息已保存到文件！\n");
}

// 从文件中读取员工信息
void load_employee()
{
    FILE *fp;
    if ((fp = fopen("employee.txt", "r")) == NULL) {
        printf("文件打开失败！\n");
        return;
    }
    Employee *p = head;
    while (p != NULL) {
        Employee *temp = p->next;
        free(p);
        p = temp;
    }
    head = NULL;
    char name[MAX_NAME];
    char id[MAX_ID];
    char department[MAX_DEPARTMENT];
    float salary;
    int attendance;
    int performance;
    while (fscanf(fp, "%s %s %s %f %d %d", name, id, department, &salary, &attendance, &performance) != EOF) {
        Employee *new_employee = (Employee *)malloc(sizeof(Employee));
        strcpy(new_employee->name, name);
        strcpy(new_employee->id, id);
        strcpy(new_employee->department, department);
        new_employee->salary = salary;
        new_employee->attendance = attendance;
        new_employee->performance = performance;
        new_employee->next = NULL;
        if (head == NULL) {
            head = new_employee;
        } else {
            Employee *p = head;
            while (p->next != NULL) {
                p = p->next;
            }
            p->next = new_employee;
        }
    }
    fclose(fp);
    printf("员工信息已从文件中读取！\n");
}

// 主函数
int main()
{
    int choice;
    while (1) {
        print_menu();
        printf("请选择要进行的操作：");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                input_employee();
                break;
            case 2:
                modify_employee();
                break;
            case 3:
                delete_employee();
                break;
            case 4:
                query_employee();
                break;
            case 5:
                print_employee();
                break;
            case 6:
                calculate_salary();
                break;
            case 7:
                attendance_management();
                break;
            case 8:
                performance_assessment();
                break;
            case 9:
                employee_management();
                break;
            case 10:
                save_employee();
                break;
            case 11:
                load_employee();
                break;
            case 0:
                printf("谢谢使用！\n");
                return 0;
            default:
                printf("无效选项！\n");
                break;
        }
    }
    return 0;
}

注意：该代码仅供参考，实际开发中需要根据具体情况进行修改和完善。