[填空题] 在窗体画一个命令按钮，然后编写如下过程: Function fun(ByVal num As Long)As LoneDim k As Longk=1 num=Abs (num)

[填空题] 在窗体画一个命令按钮，然后编写如下过程: Function fun(ByVal num As Long)As LoneDim k As Longk=1 num=Abs (num) Do While num k=k*(num Mod 10) num=num10 Loop fun=k End Function Private Sub Command1_Click() Dim n As Long Dim r As Longn= InputBox (“请输入一个数”)n=CLng (n)r=fun (n)Print r End Sub程序运行后，单击命令按钮，在输入对话框中输入234，输出结果为 【12】 。