下面程序:Private Sub Form_Click() Dim x,y,z As Integer x=5 y=7 z=0 Call P1(x,y,z) Print St
下面程序: Private Sub Form_Click() Dim x,y,z As Integer x=5 y=7 z=0 Call P1(x,y,z) Print Str(z) End Sub Sub P1(ByVal a As Integer,ByVal b As Integer,c As Integer) c=a+b End Sub 运行后的输出结果为 ______。
A.0
B.12
C.Sb(z)
D.显示错误信息