Обработка элементов массива (массив в виде динамической структуры)

//---------------------------------------------------------------------------
#include <math.h>
#include <fstream.h>
#include <vcl.h>
#pragma hdrstop
 
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
struct elementy {int spisok; struct elementy*next;};
struct elementy *first=NULL;
struct elementy *now;
struct elementy *last;
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
 
{}
 
//---------------------------------------------------------------------------
 
void __fastcall TForm1::Button1Click(TObject *Sender)
{ int x=StrToInt(Edit1->Text);
        if (first==NULL)
  {
  first=new elementy;
  first->spisok=x;
  first->next=NULL;
  last=new elementy;
  last=first;   }
        else
       if (first==last)
  {now=new elementy;
  now->spisok=x;
  first->next=now;
  now->next=NULL;
  last=now;}
  else
  { now=new elementy;
  now->spisok=x;
  now->next=NULL;
  last->next=now;
  last=now;}
  Edit1->Text="";
  Edit1->SetFocus();
 }
 
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
 first = new elementy;
 last = NULL; } 
 
 
//---------------------------------------------------------------------------
 
 
void __fastcall TForm1::Button2Click(TObject *Sender)
{ last=first;
  now=first;
  first->next=NULL;      
  first->next=now;
  now->next=NULL;
  last=now; 
  }
 
//---------------------------------------------------------------------------
 
void __fastcall TForm1::Button3Click(TObject *Sender)
{
 Memo1->Clear();
now=first;
 while (now!=NULL)
{
Memo1->Lines->Add( IntToStr(now->spisok));
now=now->next;}
}
//---------------------------------------------------------------------------