执行下面程序,单击Command 1按钮,窗体上显示的第一行是_____。 Option Explicit Private Sub Command1_Click() Dim I As Integer, n As Integer For i=5 To 15 Step 2 n=fun1(I,I) Print n Next I Print I End Sub Private Function fun1(ByVal a As Integer, b As Integer) b=a+b fun1=a+b End Function