通过域名获取ip地址

#include <WinSock2.h>#include <WS2tcpip.h>#include <iostream>#pragma comment(lib,"WS2_32.lib")int _tmain(int argc, _TCHAR* argv[]){int ret = 0;WSADATA wsaData;ret = WSAStartup(MAKEWORD(2, 2), &wsaData);if (ret != 0){return -1;}addrinfo hints;addrinfo* result = NULL;sockaddr_in* sockaddr_ipv4 = NULL;ZeroMemory(&hints, sizeof(hints));hints.ai_family = AF_UNSPEC;hints.ai_socktype = SOCK_STREAM;hints.ai_protocol = IPPROTO_TCP;ret = getaddrinfo("www.baidu.com", "80", &hints, &result);if (ret != 0){return -1;}for (auto ptr = result; ptr != NULL; ptr=ptr->ai_next){switch (ptr->ai_family){case AF_UNSPEC:break;case AF_INET:sockaddr_ipv4 = (sockaddr_in*)ptr->ai_addr;std::cout << inet_ntoa(sockaddr_ipv4->sin_addr) << std::endl;break;default:std::cout << "other: " << ptr->ai_family << std::endl;}}int wait;std::cin >> wait;return 0;}