单项选择题

在窗体上画 1 个命令按钮,名称为 Command1,然后编写如下程序: Dim Flag As Boolean Private Sub Command1_Click() Dim intNum As Integer intNum=InputBox("请输入:") If Flag Then Print f(intNum) End If End Sub Function f(X as Integer)As Integer If X<10 Then Y=X Else Y=X+10 End If f=Y End Function Private Sub Form_MouseUp(Button As Integer,Shift As Integer,X as Single,Y As Single) Flag=True End Sub 运行程序,首先单击窗体,然后单击命令按钮,在输入对话框中输入5,则程序的输 出结果为______。

A.0
B.5
C.15
D.无任何输出