如下程序段,要計算s=1+(1+2)+(1+2+3),已知主調(diào)程序為: Private Sub Button1_Click(…) Handles Button1.Click Dim s% = 0,i% For i = 1 To 3 s = s + sum(i) Next MsgBox(“s=” & s) End Sub 關(guān)于sum函數(shù)過程及變量聲明,下列選項不能實現(xiàn)的是 。
A、Function sum(ByVal n%) Dim c% c = c + n sum = c End Function B、Function sum(ByVal n%) Static c% c = c + n sum = c End Function C、Public c% Function sum(ByVal n%) c = c + n sum = c End Function D、Dim c% Function sum(ByVal n%) c = c + n sum = c End Function