在C++中連接網絡通常使用Socket編程來實現。以下是一個簡單的示例代碼，演示如何使用Socket連接網絡：

#include <iostream>
#include <string>
#include <winsock2.h>

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

int main() {
    // 初始化Winsock
    WSADATA wsData;
    WORD ver = MAKEWORD(2, 2);

    int wsResult = WSAStartup(ver, &wsData);
    if (wsResult != 0) {
        std::cerr << "Can't start Winsock, Error #" << wsResult << std::endl;
        return 1;
    }

    // 創建Socket
    SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == INVALID_SOCKET) {
        std::cerr << "Can't create socket, Error #" << WSAGetLastError() << std::endl;
        WSACleanup();
        return 1;
    }

    // 連接服務器
    sockaddr_in hint;
    hint.sin_family = AF_INET;
    hint.sin_port = htons(80); // 端口號
    hint.sin_addr.S_un.S_addr = inet_addr("192.168.1.1"); // 服務器IP地址

    int connResult = connect(sock, (sockaddr*)&hint, sizeof(hint));
    if (connResult == SOCKET_ERROR) {
        std::cerr << "Can't connect to server, Error #" << WSAGetLastError() << std::endl;
        closesocket(sock);
        WSACleanup();
        return 1;
    }

    std::cout << "Connected to server!" << std::endl;

    // 關閉Socket和清理Winsock
    closesocket(sock);
    WSACleanup();

    return 0;
}

在上面的代碼中，我們通過Winsock庫來初始化網絡連接，并創建一個Socket來連接指定的服務器IP地址和端口號。如果連接成功，就會輸出"Connected to server!"，否則輸出錯誤信息。最后，記得關閉Socket和清理Winsock。