请问 怎么计算两个日期之间相差多少天！

请教 如何计算两个日期之间相差多少天！！！
RT ! 谢谢！

[解决办法]

Delphi(Pascal) code

uses DateUtils;var  T0,T1: TDateTime;begin  T0 := StrToDateTime('2010-05-27');  T1 := StrToDateTime('2010-06-27');  ShowMessage(IntToStr(DaysBetween(T0,T1)));//相差 31 天end;
[解决办法]
Delphi(Pascal) code
var  T0,T1: TDateTime;begin  T0 := StrToDateTime('2010-05-27');  T1 := StrToDateTime('2010-06-27');  ShowMessage(Format('%d', [Abs(Trunc(T0 - T1))]));