单选题 单击一次命令按钮之后，窗体中的输出结果为______ 。 Private Sub Command1_ Click() Dim a As Integer, b As Integer For i = 1 To 6 a=i*i+i Next i Call writein(a, b) Print a, b End Sub Sub writein(a, ByVal b) b = 1 For i = 1 To 6 a=b* 4 b = b + 1 Next i End Sub