addv.pas

一个表达式计算库

unit AddV;

interface

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

type
  TAddVar = class(TForm)
    Button1: TButton;
    Button2: TButton;
    Edit1: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Edit2: TEdit;
    Label3: TLabel;
    Edit3: TEdit;
    Label4: TLabel;
    ComboBox1: TComboBox;
    Label5: TLabel;
    Label6: TLabel;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
    procedure ClearFields;
  end;

var
  AddVar: TAddVar;

implementation

{$R *.DFM}

procedure TAddVar.FormCreate(Sender: TObject);
begin
  ComboBox1.ItemIndex:=0;
end;

procedure TAddVar.ClearFields;
begin
  Edit1.Text:='';
  ComboBox1.ItemIndex:=0;
  Edit2.Text:='';
  Edit3.Text:='';
end;

end.