Delphi

unit Unit1_1;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls;type TForm1 = class(TForm) Label1: TLabel; Timer1: TTimer; Button1: TButton; procedure Timer1Timer(Sender: TObject); procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;var Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Timer1Timer(Sender: TObject);var DateTime : TDateTime; str:string;begin DateTime := Time; str := TimeToStr(DateTime); label1.Caption := TimeToStr(Time);end;procedure TForm1.Button1Click(Sender: TObject);beginlabel1.Visible := not Label1.Visible;end;end.

对delphi明白了一点，uses在形式上像#include<>

而type则是定义