参考答案

Option Base 1
Function Fun(a() As Single) As Single
    Sum = 0
    For i = 1 To UBound(a)
        Sum = Sum + a(i) / i
    Next i
    Fun = Sum
End Function
Private Sub Command1_Click()
    Dim arr
    Dim arr2(40) As Single
    arr = Array(12.5, 65.4, 56, 73, 46.23, 58.25, 83.49, 96, 27.3, 36.78, _
                29.26, 89.4, 34.7, 45.4, 56.9, 67.4, 78, 98, 87.5, 76.8, _
                34.6, 55.8, 64.7, 43.7, 99.4, 84.7, 66.2, 23.9, 55.5, 44.1, _
                33.2, 43.5, 41.2, 28.3, 78.6, 98.3, 56.1, 73.6, 49.3, 48.3)
    For i = 1 To UBound(arr)
        arr2(i) = arr(i)
    Next i
    r = Fun(arr2())
    Text1.Text = Str(r)
    SaveData
End Sub
Sub SaveData()
    Open App.Path & "\out3.txt" For Output As #1
    Print #1, Text1.Text
    Close 1
End Sub