c语言代码设计一个工资管理系统，可以通过计算员工的基本工资、奖金、岗位津贴、公积金等得到应发工资总额，并具有添加、修改、删除、查询、排序等基本的功能模块。

好的，以下是一个简单的C语言程序，可以实现工资管理系统的基本功能：

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

#define MAX_EMPLOYEES 100 // 最大员工数

// 定义员工结构体
typedef struct {
    char name[20]; // 姓名
    float basic_salary; // 基本工资
    float bonus; // 奖金
    float allowance; // 岗位津贴
    float public_fund; // 公积金
    float total_salary; // 应发工资总额
} Employee;

// 全局变量
Employee employees[MAX_EMPLOYEES]; // 员工数组
int num_employees = 0; // 当前员工数

// 函数声明
void add_employee();
void modify_employee();
void delete_employee();
void query_employee();
void sort_employees();

// 主函数
int main() {
    int choice;
    while (1) {
        // 显示菜单
        printf("\n======== 工资管理系统 ========\n");
        printf("1. 添加员工\n");
        printf("2. 修改员工\n");
        printf("3. 删除员工\n");
        printf("4. 查询员工\n");
        printf("5. 排序员工\n");
        printf("0. 退出系统\n");
        printf("请输入操作选项：");
        scanf("%d", &choice);
        
        // 根据用户选择执行相应的操作
        switch (choice) {
            case 0:
                printf("谢谢使用，再见！\n");
                exit(0);
            case 1:
                add_employee();
                break;
            case 2:
                modify_employee();
                break;
            case 3:
                delete_employee();
                break;
            case 4:
                query_employee();
                break;
            case 5:
                sort_employees();
                break;
            default:
                printf("无效的操作选项，请重新输入！\n");
                break;
        }
    }
    return 0;
}

// 添加员工
void add_employee() {
    if (num_employees >= MAX_EMPLOYEES) {
        printf("员工数已达到上限，无法添加员工！\n");
        return;
    }
    Employee emp;
    printf("请输入姓名：");
    scanf("%s", emp.name);
    printf("请输入基本工资：");
    scanf("%f", &emp.basic_salary);
    printf("请输入奖金：");
    scanf("%f", &emp.bonus);
    printf("请输入岗位津贴：");
    scanf("%f", &emp.allowance);
    printf("请输入公积金：");
    scanf("%f", &emp.public_fund);
    emp.total_salary = emp.basic_salary + emp.bonus + emp.allowance - emp.public_fund;
    employees[num_employees++] = emp;
    printf("员工添加成功！\n");
}

// 修改员工
void modify_employee() {
    char name[20];
    printf("请输入要修改的员工姓名：");
    scanf("%s", name);
    int found = 0;
    for (int i = 0; i < num_employees; i++) {
        if (strcmp(name, employees[i].name) == 0) {
            printf("请输入基本工资：");
            scanf("%f", &employees[i].basic_salary);
            printf("请输入奖金：");
            scanf("%f", &employees[i].bonus);
            printf("请输入岗位津贴：");
            scanf("%f", &employees[i].allowance);
            printf("请输入公积金：");
            scanf("%f", &employees[i].public_fund);
            employees[i].total_salary = employees[i].basic_salary + employees[i].bonus + employees[i].allowance - employees[i].public_fund;
            printf("员工修改成功！\n");
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("未找到该员工，请重新输入！\n");
    }
}

// 删除员工
void delete_employee() {
    char name[20];
    printf("请输入要删除的员工姓名：");
    scanf("%s", name);
    int found = 0;
    for (int i = 0; i < num_employees; i++) {
        if (strcmp(name, employees[i].name) == 0) {
            for (int j = i; j < num_employees - 1; j++) {
                employees[j] = employees[j + 1];
            }
            num_employees--;
            printf("员工删除成功！\n");
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("未找到该员工，请重新输入！\n");
    }
}

// 查询员工
void query_employee() {
    char name[20];
    printf("请输入要查询的员工姓名：");
    scanf("%s", name);
    int found = 0;
    for (int i = 0; i < num_employees; i++) {
        if (strcmp(name, employees[i].name) == 0) {
            printf("姓名\t基本工资\t奖金\t岗位津贴\t公积金\t应发工资总额\n");
            printf("%s\t%.2f\t\t%.2f\t%.2f\t\t%.2f\t%.2f\n", employees[i].name, employees[i].basic_salary, employees[i].bonus, employees[i].allowance, employees[i].public_fund, employees[i].total_salary);
            found = 1;
            break;
        }
    }
    if (!found) {
        printf("未找到该员工，请重新输入！\n");
    }
}

// 排序员工
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].total_salary < employees[j + 1].total_salary) {
                Employee temp = employees[j];
                employees[j] = employees[j + 1];
                employees[j + 1] = temp;
            }
        }
    }
    printf("姓名\t基本工资\t奖金\t岗位津贴\t公积金\t应发工资总额\n");
    for (int i = 0; i < num_employees; i++) {
        printf("%s\t%.2f\t\t%.2f\t%.2f\t\t%.2f\t%.2f\n", employees[i].name, employees[i].basic_salary, employees[i].bonus, employees[i].allowance, employees[i].public_fund, employees[i].total_salary);
    }
}

这个程序实现了工资管理系统的基本功能，可以添加、修改、删除、查询和排序员工信息。具体的实现细节可以根据实际需求进行改进和优化。