C++/VC 获取本机IP地址

#include"iostream"
#include"winsock2.h"
#pragma comment(lib,"ws2_32.lib")
using namespace std;

char* fetchIPAddress( )
{
	char host_name[225];
	if(gethostname(host_name,sizeof(host_name))==SOCKET_ERROR)
	{
		cout<<"Error "<<WSAGetLastError()<<" when getting local host name."<<endl; 
	}
	 
	struct hostent *phe=gethostbyname(host_name);
	if(phe==0)
	{
		cout<<"Yow!Bad host lookup."; 
	}
	 
	struct in_addr addr;
	memcpy(&addr,phe->h_addr_list[0],sizeof(struct in_addr)); 
	return inet_ntoa(addr); 
}

char* getIP(){
	WSAData wsaData;
	if(WSAStartup(MAKEWORD(1,1),&wsaData)!=0)
	{
		return NULL;
	} 
	
	char *ipAddress = fetchIPAddress();
	WSACleanup();
	return ipAddress;
}
int main()
{
	char* ip = getIP();
	cout<<ip<<endl;
	
	return 0;
}