Наследование классов

TForm1 *Form1;
class ABK{
public:
virtual ~ABK () {};
virtual void Print () const = 0;
};
class elem_int:: public ABK{
protected:
int cena;
AnsiString name,strana;
 }
 
 class elem_kuh:: public elem_int {
 public:
 void Print () const;
 elem_kuh (AnsiString name1,AnsiString strana1, AnsiString razmer1,int cena1)
{this->name=name1;
this->strana=strana1;
this->razmer=razmer1;
this->cena=cana1; };
elem_kuh{name="???";strana="??????";cena=1;razmer="0*0";};
~elem_kuh{ }
elem_kuh& operator =(const elem_kuh &p);
        bool operator < (elem_kuh &p);
        friend ofstream& operator << (ofstream& out, elem_kuh p);
        friend ifstream& operator >> (ifstream& in, elem_kuh& p);
  protected:
  AnsiString razmer;
 }
class tehnik::public elem_kuh{
 tehnik{name="???";strana="??????";cena=1;razmer="0*0";mochnoct="0");}
~tehnik{ }
void Print () const;
tehnik(AnsiString name1,AnsiString strana1, AnsiString razmer1,int cena1,int mochnoct1)
{this->name=name1;
this->strana=strana1;
this->razmer=razmer1;
this->cena=cana1;
this->mochnoct=mochnoct1;};
bool operator < (tehnik &p);
        bool Find_mochnoct (int mochnoct1, int mochnoct2);
        friend ofstream& operator << (ofstream& out, tehnik p);
        friend ifstream& operator >> (ifstream& in, tehnik& p);
  protected:
  int mochnoct;
   }
 
 
 
tehnik & tehnik :: operator = (const tehnik &h)
{
strana = h.strana;
cena = h.cena;
name = h.name;
razmer = h.razmer;
mochnoct=h.mochnoct;
return *this;
};
 
bool tehnik :: operator < (tehnik &p)
{
if (p.mochnoct < mochnoct)
        return 1;
else return 0;
};
 
bool tehnik :: Find_mochnoct (int mochnoct1, int mochnoct2);
{
if ((mochnoct >= mochnoct1) && (mochnoct <= mochnoct2))
        return 1;
else return 0;
};
 
 
 class plit::public tehnik {    
  plit(AnsiString name1,AnsiString strana1, AnsiString razmer1,int cena1,int mochnoct1,AnsiString vid_topl,int econom)
  {this->name=name1;
this->strana=strana1;
this->razmer=razmer1;
this->cena=cana1;
this->mochnoct=mochnoct1;
this->vid_topl=vid_topl1;
this->econom=econom1;
};
  plit{name="???";strcpy(strana,"??????");cena=1;strcpy(razmer,"0*0");strcpy(mochnoct,"0");vid_topl="?";econom=0;}
~plit{ }
         plit & operator = (const plit &o);
        friend ofstream& operator << (ofstream& out, plit p);
        friend ifstream& operator >> (ifstream& in, plit& p);
  protected:
  AnsiString vid_topl;
  int econom;
   }

[C++ Error] Unit1.cpp(16): E2090 Qualifier 'elem_int' is not a class or namespace name
[C++ Error] Unit1.cpp(57): E2321 Declaration does not specify a tag or an identifier

 class elem_kuh:: public elem_int