c++如何实现socket网络通信_c++ socket网络通信基础

• 创建Socket
• 绑定IP地址和端口（bind）
• 监听连接（listen）
• 接受客户端连接（accept）
• 收发数据（recv/send）
• 关闭连接

• 创建Socket
• 连接服务端（connect）
• 收发数据（recv/send）
• 关闭连接

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

int main() {
    WSADATA wsa;
    SOCKET server, client;
    sockaddr_in serverAddr, clientAddr;
    int clientLen = sizeof(clientAddr);

    // 初始化Winsock
    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0) {
        std::cout << "Failed to initialize!\n";
        return 1;
    }

    // 创建Socket
    server = socket(AF_INET, SOCK_STREAM, 0);
    if (server == INVALID_SOCKET) {
        std::cout << "Socket creation failed!\n";
        return 1;
    }

    // 设置地址结构
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_addr.s_addr = INADDR_ANY;
    serverAddr.sin_port = htons(8888);

    // 绑定
    if (bind(server, (sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        std::cout << "Bind failed!\n";
        return 1;
    }

    // 监听
    listen(server, 5);

    std::cout << "Waiting for connection...\n";
    client = accept(server, (sockaddr*)&clientAddr, &clientLen);
    if (client != INVALID_SOCKET) {
        char buffer[256];
        int bytes = recv(client, buffer, sizeof(buffer), 0);
        if (bytes > 0) {
            buffer[bytes] = '\0';
            std::cout << "Received: " << buffer << "\n";
            send(client, "Hello from server!", 18, 0);
        }
        closesocket(client);
    }

    closesocket(server);
    WSACleanup();
    return 0;
}

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

int main() {
    WSADATA wsa;
    SOCKET s;
    sockaddr_in serverAddr;

    if (WSAStartup(MAKEWORD(2, 2), &wsa) != 0) {
        std::cout << "Init failed!\n";
        return 1;
    }

    s = socket(AF_INET, SOCK_STREAM, 0);
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(8888);
    serverAddr.sin_addr.s_addr = inet_addr("127.0.0.1");

    if (connect(s, (sockaddr*)&serverAddr, sizeof(serverAddr)) == 0) {
        send(s, "Hello from client!", 18, 0);
        char buffer[256];
        int bytes = recv(s, buffer, sizeof(buffer), 0);
        if (bytes > 0) {
            buffer[bytes] = '\0';
            std::cout << "Response: " << buffer << "\n";
        }
    } else {
        std::cout << "Connect failed!\n";
    }

    closesocket(s);
    WSACleanup();
    return 0;
}