unit1.pas

第五章练习题

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Panel1: TPanel;
    Edit1: TEdit;
    Panel2: TPanel;
    Button1: TButton;
    procedure Edit1KeyPress(Sender: TObject; var Key: Char);
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Edit1KeyPress(Sender: TObject; var Key: Char);
var l:boolean;
begin
l:=(key<#48)or(key>#54);
if l then key:=#0;
end;

procedure TForm1.Button1Click(Sender: TObject);
var
a:integer;
s:string;
begin
if edit1.Text='' then edit1.Text:='0';
a:=strtoint(edit1.Text);
case a of
0:s:='星期日（Sunday）';
1:s:='星期一（Monday）';
2:s:='星期二（Tuesday）';
3:s:='星期三（Wednesday）';
4:s:='星期四（Thursday）';
5:s:='星期五（Friday）';
6:s:='星期六（Saturday）';
end;
panel2.Caption:=s;
end;

end.