#include"pch.h"
#include <iostream>
#include <WinSock2.h>	//包含WinSock库头文件
#include <ws2tcpip.h>
#pragma comment(lib,"WS2_32")	//链接WinSock导入库
using namespace std;

int main(int argc, char** argv)
{
	//初始化Winsock DLL (动态链接库）
	WSADATA wsaData;
	int ret;
	if ((ret = WSAStartup(MAKEWORD(2, 2), &wsaData)) != 0)
	{
		std::cout << "初始化WinSock出错!";
		return -1;
	}
	char hostname[256];	//用于存放获取的本机名称
	if (gethostname(hostname, sizeof(hostname)))
	{
		cout << "获取主机名字失败！\n" << endl;
		WSACleanup();
		return 0;
	}
	cout << "主机名称：" << hostname << endl;


	//根据主机名字查询主机的IPv4地址
	struct addrinfo  hints, * p_addrinfo, * p;
	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_INET;  //指定只查询IPv4地址
	unsigned int retval = getaddrinfo(hostname, NULL, &hints, &p_addrinfo);
	if (retval != 0) {
		printf("getaddrinfo failed with error: %d\n", retval);
		WSACleanup();
		return 1;
	}
	//输出IP地址
	p = p_addrinfo;
	cout << "本机IP地址：" << endl;
	char ipaddr[20];
	in_addr addr;
	while (p != NULL)
	{
		addr = ((sockaddr_in*)(p->ai_addr))->sin_addr;
		cout << inet_ntop(AF_INET, (void*)&addr, ipaddr, 20) << endl;
		p = p->ai_next;
	}
}