winsock能使用域名

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

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

int main() {
    WSADATA wsaData;
    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0) {
        std::cerr << "Failed to initialize Winsock" << std::endl;
        return 1;
    }

    struct hostent *host = gethostbyname("example.com");
    if (host == NULL) {
        std::cerr << "Failed to resolve hostname" << std::endl;
        WSACleanup();
        return 1;
    }

    SOCKET sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == INVALID_SOCKET) {
        std::cerr << "Failed to create socket" << std::endl;
        WSACleanup();
        return 1;
    }

    struct sockaddr_in serverAddr;
    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(80);
    serverAddr.sin_addr.s_addr = *((unsigned long*)host->h_addr);

    if (connect(sock, (struct sockaddr*)&serverAddr, sizeof(serverAddr)) == SOCKET_ERROR) {
        std::cerr << "Failed to connect to server" << std::endl;
        closesocket(sock);
        WSACleanup();
        return 1;
    }

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

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