帮忙看看，哪里出错了，是一个四则运算

Dim result As Integer
Dim c%, c1%, c2%

Private Sub CmdOK_Click()
     If Text1 <> "" Then
        If Val(Text1) = result Then
        L3.Caption = "真棒！"
        c1 = c1 + 1
        Label2.Caption = "正确题数：" & c1
    Else
        L3.Caption = "仔细想想，你一定会做对的！"
        c2 = c2 + 1
        Label3.Caption = "错误题数：" & c2
        Text1.SetFocus
    End If
  End If
End Sub

Private Sub Form_Load()
    Show
    Call rand
    L3 = ""
    Label1 = ""
    Label2 = ""
    Label3 = ""
End Sub

Private Sub rand()
   
     
 
End Sub

Private Sub Text1_GotFocus()
 Dim x1%, x2%
     Randomize
     x1 = Int(Rnd * 50) + 1
     x2 = Int(Rnd * 50) + 1
     Label7.Caption = x1
     Label4.Caption = x2
     Text1 = ""
     Label1.Caption = "试题总数：" & c
     c = c + 1
     Text1.SetFocus
End Sub
Private Sub Option1_Click()
  If Option1.Value Then result = x1 + x2
  L5 = "+"
End Sub

Private Sub Option2_Click()
   If Option1.Value Then result = x1 - x2
   L5 = "-"
End Sub

Private Sub Option3_Click()
  If Option1.Value Then result = x1 * x2
    L5 = "*"
End Sub

Private Sub Option4_Click()
   If Option1.Value Then result = x1 / x2
     L5 = "/"
End Sub