C++获取MAC与IP

#include <Nb30.h>
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"netapi32.lib")
std::stringGetMac()
{
    NCB ncb;
    typedef struct_ASTAT_
    {
        ADAPTER_STATUS   adapt;
        NAME_BUFFER   NameBuff[30];
    }ASTAT, *PASTAT;
    ASTAT Adapter;
    typedef struct_LANA_ENUM
    {
        UCHAR length;
        UCHAR lana[MAX_LANA];
    }LANA_ENUM;
    LANA_ENUM lana_enum;
    UCHAR uRetCode;
    memset(&ncb, 0, sizeof(ncb));
    memset(&lana_enum, 0, sizeof(lana_enum));
    ncb.ncb_command =NCBENUM;
    ncb.ncb_buffer = (unsigned char *)&lana_enum;
    ncb.ncb_length = sizeof(LANA_ENUM);
    uRetCode = Netbios(&ncb);
    if (uRetCode !=NRC_GOODRET)
        return "";
    for (int lana = 0; lana<lana_enum.length; lana++)
    {
        ncb.ncb_command =NCBRESET;
        ncb.ncb_lana_num =lana_enum.lana[lana];
        uRetCode = Netbios(&ncb);
        if (uRetCode ==NRC_GOODRET)
            break;
    }
    if (uRetCode !=NRC_GOODRET)
        return "";
    memset(&ncb, 0, sizeof(ncb));
    ncb.ncb_command =NCBASTAT;
    ncb.ncb_lana_num = lana_enum.lana[0];
    strcpy_s((char*)ncb.ncb_callname, 5, "*");
    ncb.ncb_buffer = (unsigned char *)&Adapter;
    ncb.ncb_length = sizeof(Adapter);
    uRetCode = Netbios(&ncb);
    if (uRetCode !=NRC_GOODRET)
        return "";
    char mac[128];
    sprintf_s(mac, 18, "%02X-%02X-%02X-%02X-%02X-%02X",
        Adapter.adapt.adapter_address[0],
        Adapter.adapt.adapter_address[1],
        Adapter.adapt.adapter_address[2],
        Adapter.adapt.adapter_address[3],
        Adapter.adapt.adapter_address[4],
        Adapter.adapt.adapter_address[5]
    );
    returnmac;
}
std::stringGetLanIP()
{
    WSADATA wsaData;
    char name[155];
    char *ip;
    PHOSTENT hostinfo;
    if (WSAStartup(MAKEWORD(2, 0), &wsaData) == 0)
    {
        if (gethostname(name, sizeof(name)) == 0)
        {
            if ((hostinfo = gethostbyname(name)) !=NULL)
            {
                ip = inet_ntoa(*(struct in_addr *)*hostinfo->h_addr_list);
                printf("IP地址: %s ", ip);
            }
        }
        WSACleanup();
    }
    returnip;
}