//?getIp.cpp?:?定義控制臺應用程序的入口點。
//




	//?winPrgrmSkts.cpp?:?Defines?the?entry?point?for?the?application.

#include?“stdafx.h“
#include
#include
#include
#include
#pragma?comment（lib“ws2_32.lib“）


int?main（int?argcchar?**argv）{

//聲明和初始化變量

	WSADATA?wsaData;
	int?iResult;
	DWORD?dwError;
	int?i=0;
	struct?hostent?*remoteHost;
	char?*host_name;
	struct?in_addr?addr;
	char?**pAlias;
	
	//驗證參數的合法性
	if（argc?!=2）{
	?printf（“usage:GetHostIp?hostname:\n“）;
	?return?1;

	}//if（argc?!=2）

	
	//初始化windows?socket
	iResult?=?WSAStartup（MAKEWORD（22）&wsaData）;
	if（iResult?!=0?）{
	
	printf（“WSAStartup?failed:%d\n“iResult）;
	return?1;
	}//if（iResult?!=0?）{}
	
	host_name?=?argv[1];
	//host_name=“www.google.com“;
	printf（“Calling?gethostname?with?%s\n?“host_name）;
????remoteHost?=?gethostbyname（host_name）;


	//對返回結果進行判斷
	if（remoteHost==NULL）{
	
	dwError?=?WSAGetLastError（）;

	??if（dwError?!=0）{
	????if（dwError?==?WSAHOST_NOT_FOUND）{
		printf（“Host?not?found\n“）;
		return?1;
		}else?if（dwError==WSANO_DATA）{
		printf（“No?data?record?found\n“）;
		return?1;
		}else?{
		printf（“Function?failed?with?error:%d\n“dwError）;
		return?1;

		}
	
	}//if（dwError?!=0）
	
	}//if（remoteHost==NULL）