Заголовочный файл класса, что не так?:/

#ifndef lanSwitchH
#define lanSwitchH
class LanSwitch {
    public:
     LanSwitch();
     int NumPorts;
     char* returnMac();
     void GetMac(char* EnterMac);
    private:
     char* Mac;
};
#endif

#ifndef LanSwitchH
#define LanSwitchH
class LanSwitch {
   public:
   LanSwitch();
   void GetMac();
   char* ShMac()
   {
       return mac;
   }
   private:
   char* mac;
};
#endif

//---------------------------------------------------------------------------
#ifndef fLanSwitchH
#define fLanSwitchH
//---------------------------------------------------------------------------
class TLanSwitch {
  private:
    char *Mac;
  public:
    TLanSwitch();
    ~TLanSwitch();
    int NumPorts;
    char *ReturnMac();
    void SetMac(char *NewMac);
};
//---------------------------------------------------------------------------
#endif

//---------------------------------------------------------------------------
#include "fLanSwitch.h"
#include <iostream>
//---------------------------------------------------------------------------
TLanSwitch::TLanSwitch()
{
  Mac = new char[12];
}
//---------------------------------------------------------------------------
TLanSwitch::~TLanSwitch()
{
  delete Mac;
  Mac = NULL;
}
//---------------------------------------------------------------------------
void TLanSwitch::SetMac(char *NewMac)
{
  std::strcpy(Mac,NewMac);
}
//---------------------------------------------------------------------------
char *TLanSwitch::ReturnMac()
{
  return Mac;
}
//---------------------------------------------------------------------------

//---------------------------------------------------------------------------
#include <iostream>
#include "fLanSwitch.h"
//---------------------------------------------------------------------------
int main(int argc, char *argv[])
{
  std::cout << "Creating an object ..." << std::endl;
  TLanSwitch *LanSwitch = new TLanSwitch;
  std::cout << "Setting new MAC-address..." << std::endl;
  LanSwitch->SetMac("AABBCCDDEEFF");
  std::cout << "Current MAC-address is:\t" <<   LanSwitch->ReturnMac() << std::endl;
  std::cout << "Deleting an object ..." << std::endl;
  delete LanSwitch;
  LanSwitch = NULL;
 
  std::system("pause");
  return 0;
}
//---------------------------------------------------------------------------