单项选择题

单击命令按钮时，下列程序的运行结果为

Private Sub Command1_Click()

Print Fun(23，18)

End Sub

Public Function Fun(m As Integer，n As Integer) As Integer

DO While m＜＞n

DO While m＞n:m=m-n:Loop

DO While m＜n:n=n-m:Loop

Loop

Fun=m

End Function

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