[单项选择题] 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 Inte

[单项选择题] 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 IntegerFor i = 1 To 6 a=i*i+iNext iCall writein(a, b)Print a, b End Sub Sub writein(a, ByVal b)b = 1For i = 1 To 6 a=b* 4 b = b + 1Next i End Sub

A．24 6

B．24 0

C．12 6

D．12 0

B