一道vb题目Private Sub Command1_Click() x = -5 If Sgn(x + 5) Then y = Sgn(x + 2) * Sgn(x - 2) Else y = Sgn(x) End If Print yEnd Sub为什么算到 Sgn(x + 5)时就跳到 y = Sgn(x)算了呢?怎么算的啊?急用啊

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