C语言完成Windows系统上的一对一的Socket客户端与服务器程序

好的，下面是一个简单的 C 语言 Socket 客户端和服务器程序的示例，适用于 Windows 系统：

服务器端代码：

#include <stdio.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

int main() {
    WSADATA wsaData;
    SOCKET server_socket, client_socket;
    struct sockaddr_in server_addr, client_addr;
    char buffer[1024];

    // 初始化 Winsock
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    // 创建 socket
    server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    // 初始化服务器地址结构体
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(8888);

    // 绑定 socket 和地址结构体
    bind(server_socket, (SOCKADDR *)&server_addr, sizeof(server_addr));

    // 监听连接请求
    listen(server_socket, 10);

    printf("Server started, waiting for clients...\n");

    // 接收连接请求
    int client_addr_size = sizeof(client_addr);
    client_socket = accept(server_socket, (SOCKADDR *)&client_addr, &client_addr_size);

    printf("Client connected: %s\n", inet_ntoa(client_addr.sin_addr));

    // 接收数据
    memset(buffer, 0, sizeof(buffer));
    recv(client_socket, buffer, sizeof(buffer), 0);
    printf("Received message: %s\n", buffer);

    // 发送数据
    send(client_socket, "Hello, client!", strlen("Hello, client!"), 0);

    // 关闭 socket
    closesocket(client_socket);
    closesocket(server_socket);

    // 释放 Winsock
    WSACleanup();

    return 0;
}

客户端代码：

#include <stdio.h>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

int main() {
    WSADATA wsaData;
    SOCKET client_socket;
    struct sockaddr_in server_addr;
    char buffer[1024];

    // 初始化 Winsock
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    // 创建 socket
    client_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    // 初始化服务器地址结构体
    memset(&server_addr, 0, sizeof(server_addr));
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
    server_addr.sin_port = htons(8888);

    // 连接服务器
    connect(client_socket, (SOCKADDR *)&server_addr, sizeof(server_addr));

    // 发送数据
    send(client_socket, "Hello, server!", strlen("Hello, server!"), 0);

    // 接收数据
    memset(buffer, 0, sizeof(buffer));
    recv(client_socket, buffer, sizeof(buffer), 0);
    printf("Received message: %s\n", buffer);

    // 关闭 socket
    closesocket(client_socket);

    // 释放 Winsock
    WSACleanup();

    return 0;
}

以上代码实现了一个简单的一对一 Socket 通信，服务器端监听端口 8888，客户端连接服务器，并发送一条消息，服务器接收到消息后回复一条消息。当客户端接收到服务器的回复消息后，程序结束。注意：Windows 系统下需要引入 `winsock2.h` 头文件并链接 `ws2_32.lib` 库。