观察如下VB程序段: Function fx(n As Integer) As Long If n=1 Then fx=1 Else fx=2*fx(n-1) End If End Function Private Sub Command1_Click() Dim n As Integer,x As Long n=Val(Text1.Text) x=fx(n) Text2.Text=Str(x) End Sub 若在文本框Text1中输入数字5,单击命令按钮Command1后,在文本框Text2显示的内容为( )