在窗体上画一个按钮，然后编写如下的事件代码。在按钮上单击，输出为( )。 Option Base 1 Private Sub fun(a()As Integer,n As Integer) ReDim Preserve a(n) a(6)=a(1)+a(2)+a(3)+a(4)+a(5) n=3 End Sub Private Sub Command1_Click() Dim arr1()As Integer，k As Integer ReDim arr1(5) For i=1 To 5 arr1(i)=i Next i k=6 Call fun(arr1，k) Print arr1(1)；arr1(k)；arr1(6) End Sub