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| unit bd;
{$mode objfpc} {$H+}
interface
uses
Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls,
ExtCtrls;
type
{ TForm1 }
TKind =(gold,silver,net);
TStud= packed record
fam:string[20];
fakultet:string[6];
grupp:string[5];
kind:TKind;
end;
TForm1 = class(TForm)
Button1: TButton;
ComboBox1: TComboBox;
ComboBox2: TComboBox;
Edit1: TEdit;
Label1: TLabel;
Label2: TLabel;
Label3: TLabel;
Label4: TLabel;
Label5: TLabel;
Label6: TLabel;
RadioButton1: TRadioButton;
RadioButton2: TRadioButton;
RadioButton3: TRadioButton;
RadioGroup1: TRadioGroup;
procedure Button1Click(Sender: TObject);
procedure FormActivate(Sender: TObject);
procedure FormClose(Sender: TObject; var CloseAction: TCloseAction);
private
{ private declarations }
public
{ public declarations }
end;
var
Form1: TForm1;
f:File of TStud;
implementation
{$R *.lfm}
{ TForm1 }
procedure TForm1.FormActivate(Sender: TObject);
var resp:word; x:integer;
begin
AssignFile(f,'d:\работа\stud.txt');
{$I-}
reset(f);
x:= system.FileSize(f) ;
system.Seek(f,x);
{$I+}
label5.caption:=inttostr(iOResult);
if system.IOResult=0 then button1.enabled:=true
else begin
resp:=MessageDlg('Файл базы данных не найден. Создать новую БД?',
mtinformation,[mbYes,mbNo],0);
if resp=mrYes then begin
{$I-} system.rewrite(f);
label6.caption:=inttostr(iOResult);
if system.IOResult =0 then button1.enabled:=true
else ShowMessage('Ошибка создания БД'); {$I+}
end;
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
Var stud: TStud;
begin
With stud do
begin fakultet:=combobox1.text;
fam:=Edit1.text;
grupp:=combobox2.text;
case radiogroup1.itemindex of
0: kind:=gold;
1: kind:=silver;
2: kind:=net;
end;
end;
write(f,stud);
end;
procedure TForm1.FormClose(Sender: TObject; var CloseAction: TCloseAction);
begin
closefile(f);
end;
end. |
(
