unit Unit1;interfaceuses  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,  Dialogs, StdCtrls;type  TForm1 = class(TForm)    Memo1: TMemo;     {添加 Memo 显示内容}    Button1: TButton;    Button2: TButton;    procedure Button1Click(Sender: TObject);    procedure Button2Click(Sender: TObject);  private    { Private declarations }  public    { Public declarations }  end;var  Form1: TForm1;implementation{$R *.dfm}type  TRec = record     {定义一个记录}    name: string[8];    age: Word;  end;//写入procedure TForm1.Button1Click(Sender: TObject);var  rec: TRec;  ms: TMemoryStream;begin  ms := TMemoryStream.Create;  rec.name := '张三'; rec.age := 8;  ms.Write(rec, SizeOf(rec));  rec.name := '李四'; rec.age := 81;  ms.Write(rec, SizeOf(rec));  rec.name := '王二麻子'; rec.age := 18;  ms.Write(rec, SizeOf(rec));  ms.SaveToFile('c:\temp\rec.dat');  ms.Free;end;//读取procedure TForm1.Button2Click(Sender: TObject);var  rec: TRec;  ms: TMemoryStream;begin  ms := TMemoryStream.Create;  ms.LoadFromFile('c:\temp\rec.dat');  Memo1.Clear;  ms.Position := 0;  while ms.Position < ms.Size do  begin    ms.Read(rec, SizeOf(rec));    Memo1.Lines.Add(rec.name + ' ' + IntToStr(rec.age));  end;  {Memo1 的显示结果会是:    张三 8    李四 81    王二麻子 18  }  ms.Free;end;end.