本文整理自网络,侵删。
//需要引用dateutils;
unit Unit1;
interface
uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs,dateutils, StdCtrls;
type TForm1 = class(TForm) Label1: TLabel; Label2: TLabel; Label3: TLabel; Edit_nian: TEdit; Edit_yue: TEdit; Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end;
var Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);beginlabel3.caption := inttostr(DaysInAMonth(strtoint(Edit_nian.text),strtoint(Edit_yue.text)));end;
end.
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