Много ошибок)

//---------------------------------------------------------------------------
 
#include <vcl.h>
#pragma hdrstop
                #include <math.h>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
class Telement{
protected:
Telement *left, *right;
Telement (Telement*l,Telement*r)
{
left=l;
right=r;
}
public:
~Telement(void)
{delete left; delete right;}
virtual float rezult(void){}
};
 
class Number:public Telement{
float f;
public:
Number(float F): Telement(NULL,NULL)
{
f=F;
}
float rezult(void)
{return f;}
};
 
Telement *A=new Number(3);
A-> rezult();
 
struct Plus:public Telement{
Plus(Telement*l,Telement*r):Telement(l,r)
{};
float rezult(void)
{return left->rezult()+right->rezult();}
};
 
struct Mult:public Telement{
Mult(Telement* l, Telement* r):Telement(l,r){};
float rezult(void)
{
return left->rezult()*right->rezult();
}
};
 
Telement* form(AnsiString s)
{
 Telement* h;
 int p;
 int l=s.Length();
 AnsiString s1, s2;
 if((p=s.Pos('+'))>1)
 {
  s1=s.SubString(1,p-1);
  s2=s.SubString(p+1,l-p);
  h = new Plus(form(s1), form(s2));
  }
  else if ((p=s.Pos("*"))>1)
  {
  s1=s.SubString(1,p-1);
  s2=s.SubString(p+1,l-p);
  h=new Mult(form(s1),form(s2));
  }
  else if (s=="x")
  h=new Number(StrToFloat(Form1->Edit3->Text));
  else
  h=new Number(StrToFloat(s));
  return h;
  }
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender)
{
   int dec=StrToFloat(ComboBox1->Text);
   Telement* x=form(Edit1->Text);
   Edit3->Text=FloatToStrF(x->rezult(), ffFixed, 25, dec);
   Telement* fx=form(Edit2->Text);
   Edit4->Text=FloatToStrF(fx->rezult(),ffFixed, 25, dec);
}
//---------------------------------------------------------------------------
 
 
void __fastcall TForm1::ComboBox1Change(TObject *Sender)
{
Button1Click(Button1);        
}
//---------------------------------------------------------------------------