如何获取本机IP

[zhangyansjz]

如题，如何获取本机IP

[bohut]

char szhostname[128];
CString str;
//获得主机名
if( gethostname(szhostname, 128) == 0 )
{
// 获得主机ip地址
struct hostent * phost;
int i;
phost = gethostbyname(szhostname);
m_hostname=szhostname;
i=0;
int j;
int h_length=4;
for( j = 0; j<h_length; j++ )
{
CString addr;

if( j > 0 )
str += ".";

addr.Format("%u", (unsigned int)((unsigned
char*)phost->h_addr_list[i])[j]);
str += addr;
}

}
m_ipaddress=str;

[zdb26]

CString DetectLocalIP()
{
CString strIP;
char szHostName[128] = {0};
if ( gethostname(szHostName, sizeof(szHostName)) == 0 )
{
struct hostent * pHost = gethostbyname(szHostName);

if (pHost)
{
LPCSTR ip = inet_ntoa(* ((struct in_addr *) *(pHost->h_addr_list)));
strIP.Format("%s", ip);
}
}
else
{
// Handle the exp
strIP = _T("");
}

return strIP;
}

[vcmute]

别忘了
WSAStartup(0x0101, &wsaData)

[vcmute]

#include <windows.h>
#include <winsock.h>
#include <stdio.h>

void main()
{
WSADATA wsaData;
char szHostname[100];
HOSTENT *pHostEnt;
int nAdapter = 0;
struct sockaddr_in sAddr;

if (WSAStartup(0x0101, &wsaData))
{
printf("WSAStartup failed %s\n", WSAGetLastError());
return;
}

gethostname( szHostname, sizeof( szHostname ));
pHostEnt = gethostbyname( szHostname );

while ( pHostEnt->h_addr_list[nAdapter] )
{
// pHostEnt->h_addr_list[nAdapter] is the current address in host
// order.

// Copy the address information from the pHostEnt to a sockaddr_in
// structure.
memcpy ( &sAddr.sin_addr.s_addr, pHostEnt->h_addr_list[nAdapter],
pHostEnt->h_length);

// Output the machines IP Address.
printf("Name: %s\nAddress: %s\n", pHostEnt->h_name,
inet_ntoa(sAddr.sin_addr));

nAdapter++;
}
WSACleanup();
return;

}