如下程序: Private Function f(x As Single, n As Integer) As Single If n =0 Then f =1 Else If n Mod 2 =1 Then f=x * f(x, n\2) Else f=f(x, n\2) \x End If End If End Function Private Sub Command1_Click() Label1.Caption=Str(f(4, 6)) End Sub 程序运行时,单击按钮Command1,标签Label1显示的内容是( )
A . 1
B . 4
C . 27
D . 64
答案:B