单项选择题

在窗体上画一个命令按钮,然后编写如下程序
Private Sub Command1_Click( )
Dim a As Integer,b As hiteger
a=1
b=2
Print N(a,b)
End Sub
Function N(x As Integer,y As Integer)As Integer
N=IIf(x>y,x,y)
End Function
程序运行后,单击命令按钮,输出结果为

A.1
B.2
C.5
D.8