二、职工信息管理系统设计 总体需求 职工信息包括职工号、姓名、性别、出生年月、学历、职务、工资、住址、电话等（职工号不重复）。所有信息用文件保存。 功能要求： (1)系统以菜单方式工作 (2)职工信息录入功能(职工信息用文件保存)——输入 (3)职工信息浏览功能——输出 (4)查询或排序功能：按工资查询,按学历查询等 (5)职工信息删除功能 (6)职工信息修改功能 （7）按照某种信息进行排序显示（比如工资从低 到高等）用c语言实现

以下是一个简单的职工信息管理系统的设计，实现了菜单、录入、浏览、查询、删除、修改和排序等功能。具体实现细节可以根据需要进行修改和完善。

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

#define MAX_EMPLOYEES 100
#define MAX_NAME_LEN 20
#define MAX_ADDRESS_LEN 50
#define MAX_PHONE_LEN 15

// 职工信息结构体
typedef struct {
    int id;
    char name[MAX_NAME_LEN];
    char gender;
    int year, month, day;
    char education[10];
    char position[20];
    int salary;
    char address[MAX_ADDRESS_LEN];
    char phone[MAX_PHONE_LEN];
} Employee;

// 全局变量，存储职工信息
Employee employees[MAX_EMPLOYEES];
int num_employees = 0;

// 函数声明
void input_employee();
void browse_employees();
void search_by_salary();
void search_by_education();
void delete_employee();
void modify_employee();
void sort_employees();

// 主函数
int main() {
    int choice;
    while (1) {
        printf("\n职工信息管理系统\n");
        printf("1. 录入职工信息\n");
        printf("2. 浏览职工信息\n");
        printf("3. 按工资查询\n");
        printf("4. 按学历查询\n");
        printf("5. 删除职工信息\n");
        printf("6. 修改职工信息\n");
        printf("7. 按工资排序\n");
        printf("8. 退出系统\n");
        printf("请选择操作：");
        scanf("%d", &choice);
        switch (choice) {
        case 1:
            input_employee();
            break;
        case 2:
            browse_employees();
            break;
        case 3:
            search_by_salary();
            break;
        case 4:
            search_by_education();
            break;
        case 5:
            delete_employee();
            break;
        case 6:
            modify_employee();
            break;
        case 7:
            sort_employees();
            break;
        case 8:
            printf("感谢使用职工信息管理系统！\n");
            exit(0);
        default:
            printf("输入错误，请重新选择操作！\n");
            break;
        }
    }
}

// 录入职工信息
void input_employee() {
    if (num_employees >= MAX_EMPLOYEES) {
        printf("职工信息已满，无法继续录入！\n");
        return;
    }
    Employee e;
    printf("请输入职工号：");
    scanf("%d", &e.id);
    for (int i = 0; i < num_employees; i++) {
        if (employees[i].id == e.id) {
            printf("职工号已存在，请重新输入！\n");
            return;
        }
    }
    printf("请输入姓名：");
    scanf("%s", e.name);
    printf("请输入性别（M/F）：");
    scanf(" %c", &e.gender);
    printf("请输入出生年月（YYYY MM DD）：");
    scanf("%d%d%d", &e.year, &e.month, &e.day);
    printf("请输入学历：");
    scanf("%s", e.education);
    printf("请输入职务：");
    scanf("%s", e.position);
    printf("请输入工资：");
    scanf("%d", &e.salary);
    printf("请输入住址：");
    scanf("%s", e.address);
    printf("请输入电话：");
    scanf("%s", e.phone);
    employees[num_employees++] = e;
    printf("职工信息录入成功！\n");
}

// 浏览职工信息
void browse_employees() {
    if (num_employees == 0) {
        printf("职工信息为空，请先录入职工信息！\n");
        return;
    }
    printf("职工号\t姓名\t性别\t出生日期\t学历\t职务\t工资\t住址\t电话\n");
    for (int i = 0; i < num_employees; i++) {
        printf("%d\t%s\t%c\t%d-%02d-%02d\t%s\t%s\t%d\t%s\t%s\n",
               employees[i].id, employees[i].name, employees[i].gender,
               employees[i].year, employees[i].month, employees[i].day,
               employees[i].education, employees[i].position,
               employees[i].salary, employees[i].address, employees[i].phone);
    }
}

// 按工资查询
void search_by_salary() {
    int salary;
    printf("请输入工资：");
    scanf("%d", &salary);
    printf("职工号\t姓名\t性别\t出生日期\t学历\t职务\t工资\t住址\t电话\n");
    for (int i = 0; i < num_employees; i++) {
        if (employees[i].salary == salary) {
            printf("%d\t%s\t%c\t%d-%02d-%02d\t%s\t%s\t%d\t%s\t%s\n",
                   employees[i].id, employees[i].name, employees[i].gender,
                   employees[i].year, employees[i].month, employees[i].day,
                   employees[i].education, employees[i].position,
                   employees[i].salary, employees[i].address, employees[i].phone);
        }
    }
}

// 按学历查询
void search_by_education() {
    char education[10];
    printf("请输入学历：");
    scanf("%s", education);
    printf("职工号\t姓名\t性别\t出生日期\t学历\t职务\t工资\t住址\t电话\n");
    for (int i = 0; i < num_employees; i++) {
        if (strcmp(employees[i].education, education) == 0) {
            printf("%d\t%s\t%c\t%d-%02d-%02d\t%s\t%s\t%d\t%s\t%s\n",
                   employees[i].id, employees[i].name, employees[i].gender,
                   employees[i].year, employees[i].month, employees[i].day,
                   employees[i].education, employees[i].position,
                   employees[i].salary, employees[i].address, employees[i].phone);
        }
    }
}

// 删除职工信息
void delete_employee() {
    int id;
    printf("请输入要删除的职工号：");
    scanf("%d", &id);
    for (int i = 0; i < num_employees; i++) {
        if (employees[i].id == id) {
            for (int j = i; j < num_employees - 1; j++) {
                employees[j] = employees[j + 1];
            }
            num_employees--;
            printf("职工信息删除成功！\n");
            return;
        }
    }
    printf("职工信息不存在，请重新输入！\n");
}

// 修改职工信息
void modify_employee() {
    int id;
    printf("请输入要修改的职工号：");
    scanf("%d", &id);
    for (int i = 0; i < num_employees; i++) {
        if (employees[i].id == id) {
            printf("请输入姓名：");
            scanf("%s", employees[i].name);
            printf("请输入性别（M/F）：");
            scanf(" %c", &employees[i].gender);
            printf("请输入出生年月（YYYY MM DD）：");
            scanf("%d%d%d", &employees[i].year, &employees[i].month, &employees[i].day);
            printf("请输入学历：");
            scanf("%s", employees[i].education);
            printf("请输入职务：");
            scanf("%s", employees[i].position);
            printf("请输入工资：");
            scanf("%d", &employees[i].salary);
            printf("请输入住址：");
            scanf("%s", employees[i].address);
            printf("请输入电话：");
            scanf("%s", employees[i].phone);
            printf("职工信息修改成功！\n");
            return;
        }
    }
    printf("职工信息不存在，请重新输入！\n");
}

// 按工资排序
void sort_employees() {
    for (int i = 0; i < num_employees - 1; i++) {
        for (int j = 0; j < num_employees - i - 1; j++) {
            if (employees[j].salary > employees[j + 1].salary) {
                Employee temp = employees[j];
                employees[j] = employees[j + 1];
                employees[j + 1] = temp;
            }
        }
    }
    browse_employees();
}

该程序使用了一个结构体 `Employee` 来存储职工信息，使用了全局变量 `employees` 和 `num_employees` 来存储职工信息和职工人数。各个功能函数的实现比较简单明了，可以根据需要进行修改和扩展。