员工管理系统c语言服务器程序

员工管理系统的服务器程序可以使用C语言编写，以下是一个简单的实现示例：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>

#define PORT 8080

struct employee {
    int id;
    char name[50];
    float salary;
};

int main(int argc, char const *argv[]) {
    int server_fd, new_socket, valread;
    struct sockaddr_in address;
    int opt = 1;
    int addrlen = sizeof(address);
    char buffer[1024] = {0};
    char *hello = "Hello from server";
    struct employee employees[3];

    // initialize employees
    employees[0].id = 1;
    strcpy(employees[0].name, "John");
    employees[0].salary = 5000.0;

    employees[1].id = 2;
    strcpy(employees[1].name, "Mary");
    employees[1].salary = 6000.0;

    employees[2].id = 3;
    strcpy(employees[2].name, "Tom");
    employees[2].salary = 7000.0;

    // create server socket
    if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) {
        perror("socket failed");
        exit(EXIT_FAILURE);
    }

    // set socket options
    if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, &opt, sizeof(opt))) {
        perror("setsockopt failed");
        exit(EXIT_FAILURE);
    }

    address.sin_family = AF_INET;
    address.sin_addr.s_addr = INADDR_ANY;
    address.sin_port = htons(PORT);

    // bind socket to port
    if (bind(server_fd, (struct sockaddr *)&address, sizeof(address)) < 0) {
        perror("bind failed");
        exit(EXIT_FAILURE);
    }

    // listen for connections
    if (listen(server_fd, 3) < 0) {
        perror("listen failed");
        exit(EXIT_FAILURE);
    }

    // accept incoming connection
    if ((new_socket = accept(server_fd, (struct sockaddr *)&address, (socklen_t *)&addrlen)) < 0) {
        perror("accept failed");
        exit(EXIT_FAILURE);
    }

    // send welcome message
    send(new_socket, hello, strlen(hello), 0);
    printf("Hello message sent\n");

    // receive client requests
    while (1) {
        valread = read(new_socket, buffer, 1024);
        printf("%s\n", buffer);

        if (strcmp(buffer, "list") == 0) {
            // send list of employees
            send(new_socket, employees, sizeof(employees), 0);
        } else if (strcmp(buffer, "exit") == 0) {
            // exit server
            break;
        } else {
            // invalid command
            send(new_socket, "Invalid command", strlen("Invalid command"), 0);
        }

        memset(buffer, 0, 1024);
    }

    close(new_socket);
    close(server_fd);
    return 0;
}

该服务器程序创建了一个socket，将其绑定到8080端口，并监听来自客户端的连接请求。一旦有连接请求，程序将接受连接并向客户端发送欢迎消息。随后，服务器程序将持续接收客户端的请求并根据请求发送相应的数据。在该示例中，如果客户端发送了"list"请求，服务器程序将发送员工列表；如果客户端发送了"exit"请求，服务器程序将退出。