填空题

设有以下函数过程: Function fun(m As Integer) As Integer Dim k As Integer, sum As Integer sum = 0 For k = m To 1 Step -2 sum = sum + k Next k fun = sum End Function 若在程序中用语句s=fun(10)调用此函数,则s的值为 _________。

【参考答案】

30