执行下面程序,在文本框Text1中输入数据15768后单击Command1按钮,窗体上显示的第三行是_____。 Option Explicit Private Function pf(x As Integer) As Integer If x<100 Then pf=x Mod 10 Else pf=pf(x/100)*10+x Mod 10 Print pf End If End Function Private Sub Command1_Click() Dim x As Integer x=Text1 Print pf(x) End Sub