windows C++创建个server端,地址为127.0.0.1 端口7799，接收client的信息并打印log

要在Windows上使用C++创建一个服务器端，可以使用Winsock库。以下是一个简单的示例，展示了如何创建一个服务器端，监听地址为127.0.0.1，端口为7799，接收客户端的信息并打印日志。

首先，确保已经安装了Winsock库。然后，创建一个新的C++项目，并在项目中包含以下头文件：

#include <iostream>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")

接下来，编写以下代码：

int main() {
    WSADATA wsaData;
    SOCKET ListenSocket, ClientSocket;
    struct sockaddr_in server, client;

    // 初始化Winsock
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "WSAStartup failed: " << WSAGetLastError() << std::endl;
        return 1;
    }

    // 创建套接字
    ListenSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (ListenSocket == INVALID_SOCKET) {
        std::cerr << "socket failed: " << WSAGetLastError() << std::endl;
        WSACleanup();
        return 1;
    }

    // 设置服务器地址和端口
    server.sin_family = AF_INET;
    server.sin_addr.s_addr = inet_addr("127.0.0.1");
    server.sin_port = htons(7799);

    // 绑定套接字
    if (bind(ListenSocket, (struct sockaddr*)&server, sizeof(server)) == SOCKET_ERROR) {
        std::cerr << "bind failed: " << WSAGetLastError() << std::endl;
        closesocket(ListenSocket);
        WSACleanup();
        return 1;
    }

    // 监听连接
    if (listen(ListenSocket, SOMAXCONN) == SOCKET_ERROR) {
        std::cerr << "listen failed: " << WSAGetLastError() << std::endl;
        closesocket(ListenSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Server is listening on 127.0.0.1:7799" << std::endl;

    // 接受客户端连接
    int clientSize = sizeof(client);
    ClientSocket = accept(ListenSocket, (struct sockaddr*)&client, &clientSize);
    if (ClientSocket == INVALID_SOCKET) {
        std::cerr << "accept failed: " << WSAGetLastError() << std::endl;
        closesocket(ListenSocket);
        WSACleanup();
        return 1;
    }

    std::cout << "Client connected" << std::endl;

    // 接收并打印客户端信息
    char buffer[1024];
    int bytesReceived;
    while ((bytesReceived = recv(ClientSocket, buffer, sizeof(buffer), 0)) > 0) {
        buffer[bytesReceived] = '\0';
        std::cout << "Received: " << buffer << std::endl;
    }

    // 关闭套接字
    closesocket(ClientSocket);
    closesocket(ListenSocket);
    WSACleanup();

    return 0;
}

编译并运行此代码，服务器将开始监听地址为127.0.0.1，端口为7799的连接。当客户端连接到服务器时，服务器将接收并打印客户端发送的信息。