delphi Record指针测试

源代码：
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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  pshare=^Tshare;
  Tshare=record
    data:array[0..255] of char;
    count:integer;
  end;

  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Memo1: TMemo;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
  private
    { Private declarations }
  public
    constructor Create(AOwner: TComponent); override;
    destructor Destroy; override;

    { Public declarations }
  end;

var
  Form1: TForm1;
  shareData:pshare;

implementation

{$R *.dfm}
{$APPTYPE CONSOLE}

procedure TForm1.Button1Click(Sender: TObject);
begin
  shareData^.data[shareData^.count]:=chr(random(26)+65);
  inc(shareData^.count);
end;

constructor TForm1.Create(AOwner: TComponent);
var
  c:char;
begin
  inherited;
  //FillChar(shareData,255,65);
  new(sharedata);
  shareData^.count:=0;
  fillchar(shareData^.data,sizeof(shareData^.data),65);
  //RaiseLastWin32Error;
  //writeln(sharedata^.data[0]);

end;

destructor TForm1.Destroy;
begin
  Dispose(shareData);
  inherited;
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  i:integer;
begin
  memo1.Clear;
  for i:=0 to sharedata^.count-1 do
  begin
    memo1.Text:=memo1.Text+sharedata^.data[i];
  end;
end;

end.