delphi 输入年月判断天数

//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);

begin

label3.caption := inttostr(DaysInAMonth(strtoint(Edit_nian.text),strtoint(Edit_yue.text)));

end;

end.

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