Returns the number of whole days between two specified TDateTime values.UnitDateUtilsCategorydatetime routinesDelphi syntax:function DaysBetween(const ANow, AThen: TDateTime): Integer;C++ syntax:extern PACKAGE int __fastcall DaysBetween(const System::TDateTime ANow, const System::TDateTime AThen);DescriptionCall DaysBetween to obtain the difference, in days, between two TDateTime values.DaysBetween counts only whole days. Thus, DaysBetween reports the difference between Dec 31, 1999 11:59 PM and Jan 1, 2000 11:58 PM as 0 because the difference is one minute short of an entire day.
function DaysBetween(const ANow, AThen: TDateTime): Integer;
function DaysBetween(const ANow, AThen: TDateTime): Integer;
印象中好像是可以直接相减的 不太清楚了,好久不用delphi了
procedure TForm1.Button1Click(Sender: TObject); begin Edit1.Text:=IntToStr(DaysBetween(date,StrToDate('2003-5-6')));//天数 Edit2.Text:=IntToStr(MonthsBetween(date,StrToDate('2003-5-6')));//月数 Edit3.Text:=IntToStr(YearsBetween(date,StrToDate('2003-5-6')));//年数 end;
function DaysBetween(const ANow, AThen: TDateTime ): Integer;
不太清楚了,好久不用delphi了
begin
Edit1.Text:=IntToStr(DaysBetween(date,StrToDate('2003-5-6')));//天数
Edit2.Text:=IntToStr(MonthsBetween(date,StrToDate('2003-5-6')));//月数
Edit3.Text:=IntToStr(YearsBetween(date,StrToDate('2003-5-6')));//年数
end;
): Integer;