Чтение из Edit и запись в файл

#include <clx.h>
#pragma hdrstop
#include <stdio.h>
#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.xfm"
TForm1 *Form1;
//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------
 
 TEdit *Edit1;
 int d123 = Edit1->Text.ToInt();
 
void __fastcall TForm1::Button1Click(TObject *Sender)
{
FILE * pFile;
pFile=fopen("z.txt", "w");
 
{
fprintf(pFile, "R2in= %d", d123);
}
 
fclose(pFile);
}
//---------------------------------------------------------------------------

int d123 = StrToInt(Edit1->Text);

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  int d123 = StrToInt(Edit1->Text);
  TStringList *L = new TStringList;
  L->Add(String().sprintf("%s = %d", Label1->Caption, d123));
  L->SaveToFile("z.txt");
  delete L;
}

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  int d123 = StrToInt(Edit1->Text);
  TStringList *L = new TStringList;
  L->Add(String().sprintf("R2in=%d",  d123));
  L->SaveToFile("z.txt");
  delete L;
}