在窗体上画一个命令按钮,然后编写如下程序: Sub S1(ByVal x As I
题型:单项选择题
问题:
在窗体上画一个命令按钮,然后编写如下程序:
Sub S1(ByVal x As Integer, ByVal y As Integer)
Dim t As Integer
t=x
x=y
y=t
End Sub
Private Sub Command1_Click()
Dim a As Integer, b As Integer
a=10
b=30
S1 a, b
Print "a="; a; "b="; b
End Sub
程序运行后,单击命令按钮,输出结果是______。
A.a=30 b=10
B.a=30 b=30
C.a=10 b=30
D.a=10 b=10