C++通过域名获取IP地址的方法；调试通过！

BOOL  GetIpByDomainName(char *szHost,char szIp[100][100],int *nCount)
{
    WSADATA        wsaData;   
    char           szHostname[100];   
    HOSTENT   *pHostEnt;   
    int             nAdapter   =   0;   
    struct       sockaddr_in   sAddr;   
    if   (WSAStartup(0x0101,   &wsaData))   
    {   
        AfxMessageBox("WSAStartup   failed   %s/n",   WSAGetLastError());   
        return FALSE;   
    }

    pHostEnt   =  gethostbyname(szHost);
    if (pHostEnt)
    {
        while   (   pHostEnt->h_addr_list[nAdapter]   )   
        {   
            memcpy   (   &sAddr.sin_addr.s_addr,   pHostEnt->h_addr_list[nAdapter],   pHostEnt->h_length);   
            char  szBuffer[1024] = {0};

            sprintf(szBuffer,"%s", inet_ntoa(sAddr.sin_addr));

            strcpy(szIp[nAdapter],szBuffer);
            OutputDebugString(szBuffer);
            nAdapter++;   
        }   

        *nCount = nAdapter;
    }
    else
    {
        DWORD  dwError = GetLastError();
        CString  csError;
        csError.Format("%d",dwError);
        OutputDebugString(csError);
        OutputDebugString("gethostbyname failed");
        *nCount = 0;
    }
    WSACleanup();
    return TRUE;   

}

1     int            nCount =0  ;
 2     char        szIp0[100][100];
 3     char        szDomain[256] ={0};
 4     char        szIp[2048] ={0};
 5     strcpy(szDomain,"www.baidu.com");
 6     GetIpByDomainName(szDomain, szIp0,&nCount);
 7     int nK = 0;
 8     for (nK = 0; nK < nCount; nK++)
 9     {
10         strcat(szIp,szIp0[nK]);
11         strcat(szIp,"\r\n");
12     }
13     OutputDebugString(szIp)

原文链接: https://www.cnblogs.com/jkszbf/p/5663469.html

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