Private Sub Command1_Click()

  Dim sjzs As Integer

  Dim rjzs As String

  sjzs = Val(Text1.Text)

  rjzs = ""

  Do While Int(sjzs / 2) > 0

    rjzs = Str(sjzs Mod 2) + rjzs

    sjzs = Int(sjzs / 2)

  Loop

  Label1.Caption = rjzs

End Sub

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（  ）

Private Sub Command1_Click()

Dim s As String, s1 As String, c As String

s = Text1.Text

For i = 1 To Len(s)

  c = Mid(s, i, 1)

  s1 =          ⑴           

  For  j =           ⑵                

   If c <> Mid(s, j, 1) Then

   s1 = s1 + Mid(s, j, 1)

   End If

  Next j

         ⑶         

Next i

Text2.Text = s

End Sub