Quadratic equation in Basic

Function GetInt()
  Input = WScript.StdIn.ReadLine
  If not IsNumeric(Input) Then
    WScript.Echo "Coefficient is not a number."
    WScript.Quit
  End If
  GetInt = CInt(Input)
End Function
  

A = GetInt()
If A = 0 Then
  WScript.Echo "Not a quadratic equation."
  WScript.Quit
End If
B = GetInt()
C = GetInt()
D = B * B - 4 * A * C
p1 = -B / 2.0 / A
p2 = Sqr(Abs(D)) / 2.0 / A
If D = 0 Then
  WScript.Echo "x = " & p1
Else
  If D > 0 Then
    WScript.Echo "x1 = " & (p1 + p2)
    WScript.Echo "x2 = " & (p1 - p2)
  Else
    WScript.Echo "x1 = (" & p1 & ", " & p2 & ")"
    WScript.Echo "x2 = (" & p1 & ", " & -p2 & ")"
  End If
End If