windows环境下socket客户端服务器通信c代码

以下是一个简单的 Windows 环境下使用 socket 进行客户端和服务器通信的 C 代码示例。

服务器端代码：

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

#pragma comment(lib, "ws2_32.lib") // 链接 ws2_32.lib 库

int main() {
    WSADATA wsaData;
    SOCKET serverSocket, clientSocket;
    SOCKADDR_IN serverAddr, clientAddr;
    int clientAddrLen = sizeof(clientAddr);
    char buffer[1024] = {0};

    // 初始化 Winsock
    int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (iResult != 0) {
        printf("WSAStartup failed: %d\n", iResult);
        return 1;
    }

    // 创建套接字
    serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (serverSocket == INVALID_SOCKET) {
        printf("socket failed: %ld\n", WSAGetLastError());
        WSACleanup();
        return 1;
    }

    // 绑定套接字到本地端口
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    serverAddr.sin_port = htons(8888);
    if (bind(serverSocket, (SOCKADDR*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        printf("bind failed: %d\n", WSAGetLastError());
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    // 监听客户端连接请求
    if (listen(serverSocket, 5) == SOCKET_ERROR) {
        printf("listen failed: %d\n", WSAGetLastError());
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    // 等待客户端连接
    printf("等待客户端连接...\n");
    clientSocket = accept(serverSocket, (SOCKADDR*)&clientAddr, &clientAddrLen);
    if (clientSocket == INVALID_SOCKET) {
        printf("accept failed: %d\n", WSAGetLastError());
        closesocket(serverSocket);
        WSACleanup();
        return 1;
    }

    // 接收客户端消息并回复
    while (1) {
        int bytesReceived = recv(clientSocket, buffer, sizeof(buffer), 0);
        if (bytesReceived > 0) {
            printf("接收到客户端消息： %s\n", buffer);
            send(clientSocket, buffer, bytesReceived, 0);
        }
    }

    // 关闭套接字
    closesocket(serverSocket);
    WSACleanup();

    return 0;
}

客户端代码：

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

#pragma comment(lib, "ws2_32.lib") // 链接 ws2_32.lib 库

int main() {
    WSADATA wsaData;
    SOCKET clientSocket;
    SOCKADDR_IN serverAddr;
    char buffer[1024] = {0};

    // 初始化 Winsock
    int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (iResult != 0) {
        printf("WSAStartup failed: %d\n", iResult);
        return 1;
    }

    // 创建套接字
    clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (clientSocket == INVALID_SOCKET) {
        printf("socket failed: %ld\n", WSAGetLastError());
        WSACleanup();
        return 1;
    }

    // 连接到服务器
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
    serverAddr.sin_port = htons(8888);
    if (connect(clientSocket, (SOCKADDR*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        printf("connect failed: %d\n", WSAGetLastError());
        closesocket(clientSocket);
        WSACleanup();
        return 1;
    }

    // 发送消息并等待回复
    while (1) {
        printf("请输入消息：");
        gets(buffer);
        send(clientSocket, buffer, strlen(buffer), 0);
        int bytesReceived = recv(clientSocket, buffer, sizeof(buffer), 0);
        if (bytesReceived > 0) {
            buffer[bytesReceived] = '\0';
            printf("收到服务器回复：%s\n", buffer);
        }
    }

    // 关闭套接字
    closesocket(clientSocket);
    WSACleanup();

    return 0;
}

注意：以上代码仅供参考，实际应用中需要进行错误处理和安全性校验。