作业帮VB.if sgn（x） Private Sub Command1_Click()Dim x As Integer,y As Integerx = -4If Sgn(x) Theny = Sgn(x ^ 2)Elsey = Sgn(x)End IfEnd Subsgn函数不是为-1,0,或者1吗if sgn（x）
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VB.if sgn（x） Private Sub Command1_Click()Dim x As Integer,y As Integerx = -4If Sgn(x) Theny = Sgn(x ^ 2)Elsey = Sgn(x)End IfEnd Subsgn函数不是为-1,0,或者1吗if sgn（x）
VB.if sgn（x）
Private Sub Command1_Click()
Dim x As Integer,y As Integer
x = -4
If Sgn(x) Then
y = Sgn(x ^ 2)
Else
y = Sgn(x)
End If
End Sub
sgn函数不是为-1,0,或者1吗
if sgn（x）
VB.if sgn（x） Private Sub Command1_Click()Dim x As Integer,y As Integerx = -4If Sgn(x) Theny = Sgn(x ^ 2)Elsey = Sgn(x)End IfEnd Subsgn函数不是为-1,0,或者1吗if sgn（x）
-1, 1 时为 true, 0 时为 false
if sgn（x） then.X不为0时均符合
这啰嗦代码是不是下面这功能
y=sgn(x^2)