如何得到计算机的IP地址？

Question

#include <winsock2.h>#pragma comment(lib,"ws2_32.lib")main()
{
      WORD wVersionRequested;
      WSADATA wsaData;
      char name[255];
      CString ip;
      PHOSTENT hostinfo;
      wVersionRequested = MAKEWORD( 2, 0 );      if ( WSAStartup( wVersionRequested, &wsaData ) == 0 )
      {            if( gethostname ( name, sizeof(name)) == 0)
            {
                  if((hostinfo = gethostbyname(name)) != NULL)
                  {
                        ip = inet_ntoa (*(struct in_addr *)*hostinfo->h_addr_list);
                  }
            }
            
            WSACleanup( );
      } 
}

Answer 1

#include <winsock.h>
#pragma comment(lib,"ws2_32")
BOOL CPlayerTypeDlg::GetLocalIP(BYTE &nField00, BYTE &nField01, BYTE &nField02, BYTE &nField03)
{
    WORD wVersionRequested;
    WSADATA wsaData;
    char szHostName[128];
    wVersionRequested=MAKEWORD(2,0);    if(WSAStartup(wVersionRequested,&wsaData)==0)
    {
        if(gethostname(szHostName,128)==0)
        {
            struct hostent* pHost;
            int i;            pHost=gethostbyname(szHostName); 
            for(i=0;pHost!=NULL && pHost->h_addr_list[i]!=NULL;i++)
            {
                nField00=(unsigned int)((unsigned char*)pHost->h_addr_list[i])[0];
nField01=(unsigned int)((unsigned char*)pHost->h_addr_list[i])[1];
nField02=(unsigned int)((unsigned char*)pHost->h_addr_list[i])[2];
nField03=(unsigned int)((unsigned char*)pHost->h_addr_list[i])[3];
            }
        }
        WSACleanup();
    }
if ((nField00==0) && (nField02==0) && (nField01==0) && (nField03==0))
return false;
else
return true;
}