字串及陣列寫入及讀取檔案

新增4個TButton、1個TMemo、2個TEdit

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Memo1: TMemo;
    Edit1: TEdit;
    Edit2: TEdit;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var
  F : textfile;
begin
  AssignFile(F,'data.txt');
  ReWrite(F);

  //寫入數據
  WriteLn(F, Edit1.Text);
  WriteLn(F, Edit2.Text);
  CloseFile(F);
  Showmessage('寫入成功');
end;

procedure TForm1.Button2Click(Sender: TObject);
var
  F : textfile;
  s1,s2 : string;

begin
  AssignFile(F,'data.txt');
  Reset(F);
  //讀取數據
  ReadLn(F, s1); //不能直接寫Edit1.Text
  ReadLn(F, s2); //不能直接寫Edit2.Text
  Edit1.Text := s1;
  Edit2.Text := s2;
  CloseFile(F);
  Showmessage('讀取成功');
end;

procedure TForm1.Button3Click(Sender: TObject);
var
  n : array[1..100] of integer;
  i : integer;
  F : textfile;
begin
  AssignFile(F,'number.txt');
  Rewrite(F);
  for i := 1 to 100 do
  begin
    n[i] := i;
    Writeln(F,n[i]);
  end;
  CloseFile(F);
  Showmessage('寫入成功');
end;

procedure TForm1.Button4Click(Sender: TObject);
var
  n : array[1..100] of integer;
  i : integer;
  F : textfile;
begin
  AssignFile(F,'number.txt');
  Reset(F);
  i := 0;
  while not(EOF(F)) do begin
    i := i+1;
    Readln(F, n[i]);
    Memo1.Lines.add(inttostr(n[i]));
  end;
  closeFile(F);
  Showmessage('讀取成功');
end;

end.