Delphi中的增時函數

IncYear、IncMonth、IncWeek、IncDay、IncHour、IncMinute、IncSecond、IncMilliSecond - 增時

DateUtils.IncYear();
DateUtils.IncMonth();
DateUtils.IncWeek();
DateUtils.IncDay();
DateUtils.IncHour();
DateUtils.IncMinute();
DateUtils.IncSecond();
DateUtils.IncMilliSecond();

unit　Unit1;

interface

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

type
　TForm1　=　class(TForm)
　　procedure　FormCreate(Sender:　TObject);
　end;

var
　Form1:　TForm1;

implementation

{$R　*.dfm}

uses　DateUtils;

procedure　TForm1.FormCreate(Sender:　TObject);
var
　t1,t2:　TDateTime;
　i:　Int64;
　d:　Double;
begin
　t1　:=　StrToDateTime('2011-1-1　1:1:1');

　t2　:=　IncYear(t1);
　ShowMessage(DateTimeToStr(t2));　//2012-1-1　1:01:01

　t2　:=　IncYear(t1,　3);
　ShowMessage(DateTimeToStr(t2));　//2014-1-1　1:01:01

　t2　:=　IncMonth(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-2-1　1:01:01

　t2　:=　IncWeek(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-1-8　1:01:01

　t2　:=　IncDay(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-1-2　1:01:01

　t2　:=　IncHour(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-1-1　2:01:01

　t2　:=　IncMinute(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-1-1　1:02:01

　t2　:=　IncSecond(t1);
　ShowMessage(DateTimeToStr(t2));　//2011-1-1　1:01:02

　t2　:=　IncMilliSecond(t1);
　ShowMessage(FormatDateTime('yyyy-m-d　h:n:s:zzz',　t2));　//2011-1-1　1:01:01:001
end;

end.