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( )