Dim X As Long
  Dim x1 As Long
  Dim x2 As Long
  Dim a As Long
  Dim b As Long
  
  Dim c As Long
  a = Text1.Text
  b = Text2.Text
  c = Text3.Text
  If a = 0 Then
   x1 = (-c) / b
     Text4.Text = x1
  Text5.Text = x1
   Exit Sub
  End If
  
  If b ^ 2 - 4 * a * c < 0 Then
    MsgBox "没有根"
    Exit Sub
  End If
  
  
  x1 = (-(b) + Sqr(b ^ 2 - 4 * a * c)) / 2 * a
 x2 = (-(b) - Sqr(b ^ 2 - 4 * a * c)) / 2 * a
  Text4.Text = x1
  Text5.Text = x2



											
	    

	





										
					
	
你说的我不知道,不过我想,你的讨论If a = 0 Then