我有以下代码，当我肯定有两个时，VBA给我一个“Next Without For”错误。我知道VBA可以列出与它们所说的不完全相同的错误，但我找不到任何其他闭环。如果有人可以检查出来，那就太棒了！感谢：
Option Explicit
Sub HW09()
Dim ng As Integer
Dim v As String
Dim lg As String
Dim ca As Integer
Dim sd As Integer
Dim c As Integer
Dim r As Integer
c = 2
Do
ng = InputBox("Please enter the student's numerical grade.")
If ng < 0 Then
ng = 0
If ng > 100 Then
ng = 100
End If
Cells(c, 2).Value (ng)
c = c + 1
v = InputBox("Would you like to enter another grade? Type 'Y' for yes and 'N' for no.")
If v = "N" Then Exit Do
End If
Loop
Cells(1, 2).Value ("Numerical Grade")
Cells(1, 1).Value ("Letter Grade")
For r = 1 To c
If Cells(r, 2) >= 90 Then
lg = "A"
Cells(r, 1).Value (lg)
If Cells(r, 2) >= 80 Then
lg = "B"
Cells(c, 1).Value (lg)
If Cells(r, 2) >= 70 Then
lg = "C"
Cells(c, 1).Value (lg)
If Cells(r, 2) >= 60 Then
lg = "D"
Cells(c, 1).Value (lg)
Else
lg = "F"
Cells(c, 1).Value (lg)
End If
r = r + 1
Next r
c = c - 1
ca = Application.WorksheetFunction.Average("(1,2):(1,c)")
If ca >= 90 Then
lg = "A"
If ca >= 80 Then
lg = "B"
If ca >= 70 Then
lg = "C"
If ca >= 60 Then
lg = "D"
Else
lg = "F"
End If
MsgBox ("The average letter grade for these " & (c) & " students is " & (lg) & ".")
sd = c * (Application.WorksheetFunction.Sum("(1, 2)(1, c) ^ 2)")-Application.WorksheetFunction.Sum("(1, 2)(1, c)") ^ 2 / (c * (c - 1)))
MsgBox ("The standard deviation for these grades is" & (sd) & ".")
End Sub
答案 0 :(得分：13)
您的问题是If... Then... If... Then...而不是If... Then... ElseIf... Then...
If Cells(r, 2) >= 90 Then
lg = "A"
Cells(r, 1).Value (lg)
ElseIf Cells(r, 2) >= 80 Then
lg = "B"
Cells(c, 1).Value (lg)
ElseIf Cells(r, 2) >= 70 Then
lg = "C"
Cells(c, 1).Value (lg)
ElseIf Cells(r, 2) >= 60 Then
lg = "D"
Cells(c, 1).Value (lg)
Else
lg = "F"
Cells(c, 1).Value (lg)
End If
答案 1 :(得分：7)
每个IF statement都需要以ENDIF终止。
在FOR/NEXT loop你有4 IFs，一个ELSE和一个ENDIF
这需要改为：
IF Condition1 THEN
'code
ELSEIF Condition2 THEN
'code
ELSEIF Condition3 THEN
'code
ELSEIF Condition4 THEN
'code
ELSE 'All other possibilities
'code
ENDIF
答案 2 :(得分：5)
我认为If中的嵌套For r = 1 to c...语句没有正确关闭？通常，每个If也需要一个End If，而您只有一个End If语句。这导致编译器在Next r块“仍在”内部时到达If语句，因此错误提升，并且有意义。
您可以使用Select Case开关而不是嵌套多个If/Then语句。根据我的经验，在调试时它们更容易解释。类似的东西：
For r = 1 To c
Select Case Cells(r,2)
Case >= 90
lg = "A"
Case >= 80
lg = "B"
Case >= 70
lg = "C"
Case >= 60
lg = "D"
Case Else
lg = "F"
End Select
Cells(r,1).Value = lg
r = r + 1 '## You may want to omit this line, see my comments.
Next r
注意：您可能希望省略r = r+1，除非您打算跳过其他所有记录，Next语句会自动将r增加1的值除非另有说明。
如果你打算跳过其他所有记录，你应该For r = 1 to c Step 2同样省略r = r+1。
答案 3 :(得分：2)
条件未关闭时会发生此错误。 如果条件允许，你必须不要伪造。
例如：
Public Sub start_r()
LastRow = SPT_DB.Range("D" & Rows.count).End(xlUp).Row
Dim i As Long
For i = 3 To 132
State = Cells(1, i)
Dim j As Long
For j = 2 To LastRow
m = SPT_DB.Cells(j, 4).Value
z = SPT_DB.Cells(j, 5).Value
n1 = SPT_DB.Cells(j, 6).Value
fc = SPT_DB.Cells(j, 7).Value
am = SPT_DB.Cells(j, 8).Value
sp = SPT_DB.Cells(j, 10).Value
sr = SPT_DB.Cells(j, 11).Value
liq = SPT_DB.Cells(j, 13).Value
num1 = Val(Left(State, 1))
num2 = Val(Mid(State, 3, 1))
num3 = Val(Mid(State, 5, 1))
num4 = Val(Mid(State, 7, 1))
num5 = Val(Mid(State, 9, 1))
Dim spt_class As spt_class
Set spt_class = New spt_class
Select Case num1
Case Is = 1: Call spt_class.rd_r1
Case Is = 2: Call spt_class.rd_r2
Case Is = 3: Call spt_class.rd_r3
Case Is = 4: Call spt_class.rd_r4
End Select
Select Case num2
Case Is = 1: Call spt_class.msf_r1
Case Is = 2: Call spt_class.msf_r2
Case Is = 3: Call spt_class.msf_r3
Case Is = 4: Call spt_class.msf_r4
Case Is = 5: Call spt_class.msf_r5
Case Is = 6: Call spt_class.msf_r6
End Select
Select Case num3
Case Is = 0:
Case Is = 1: Call spt_class.n1_cs_r1
Case Is = 2: Call spt_class.n1_cs_r2
Case Is = 3: Call spt_class.n1_cs_r3
End Select
Select Case num4
Case Is = 0:
Case Is = 1: Call spt_class.dr_r1
Case Is = 2: Call spt_class.dr_r2
Case Is = 3: Call spt_class.dr_r3
Case Is = 4: Call spt_class.dr_r4
End Select
Select Case num5
Case Is = 1: Call spt_class.crr_r1
Case Is = 2: Call spt_class.crr_r2
Case Is = 3: Call spt_class.crr_r3
Case Is = 4: Call spt_class.crr_r4
Case Is = 5: Call spt_class.crr_r5
Case Is = 6: Call spt_class.crr_r6
Case Is = 7: Call spt_class.crr_r7
Case Is = 8: Call spt_class.crr_r8
Case Is = 9: Call spt_class.crr_r9
End Select
Call spt_class.lvr_r
Next j
If cnt_f_1_all = 0 Then
Cells(4, i) = 0
Else
Cells(4, i) = cnt_f_1_liq * 100 / cnt_f_1_all
Cells(4, i).NumberFormat = "#,##0.00"
End If
If cnt_f_2_all = 0 Then
Cells(5, i) = 0
Else
Cells(5, i) = cnt_f_2_liq * 100 / cnt_f_2_all
Cells(5, i).NumberFormat = "#,##0.00"
End If
If cnt_f_3_all = 0 Then
Cells(6, i) = 0
Else
Cells(6, i) = cnt_f_3_liq * 100 / cnt_f_3_all
Cells(6, i).NumberFormat = "#,##0.00"
End If
If cnt_f_4_all = 0 Then
Cells(7, i) = 0
Else
Cells(7, i) = cnt_f_4_liq * 100 / cnt_f_4_all
Cells(7, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n0_1_all = 0 Then
Cells(14, i) = 0
Else
Cells(14, i) = cnt_f_n0_1_liq * 100 / cnt_f_n0_1_all
Cells(14, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n0_2_all = 0 Then
Cells(15, i) = 0
Else
Cells(15, i) = cnt_f_n0_2_liq * 100 / cnt_f_n0_2_all
Cells(15, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n0_3_all = 0 Then
Cells(16, i) = 0
Else
Cells(16, i) = cnt_f_n0_3_liq * 100 / cnt_f_n0_3_all
Cells(16, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n0_4_all = 0 Then
Cells(17, i) = 0
Else
Cells(17, i) = cnt_f_n0_4_liq * 100 / cnt_f_n0_4_all
Cells(17, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n1_1_all = 0 Then
Cells(24, i) = 0
Else
Cells(24, i) = cnt_f_n1_1_liq * 100 / cnt_f_n1_1_all
Cells(24, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n1_2_all = 0 Then
Cells(25, i) = 0
Else
Cells(25, i) = cnt_f_n1_2_liq * 100 / cnt_f_n1_2_all
Cells(25, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n1_3_all = 0 Then
Cells(26, i) = 0
Else
Cells(26, i) = cnt_f_n1_3_liq * 100 / cnt_f_n1_3_all
Cells(26, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n1_4_all = 0 Then
Cells(27, i) = 0
Else
Cells(27, i) = cnt_f_n1_4_liq * 100 / cnt_f_n1_4_all
Cells(27, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n2_1_all = 0 Then
Cells(34, i) = 0
Else
Cells(34, i) = cnt_f_n2_1_liq * 100 / cnt_f_n2_1_all
Cells(34, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n2_2_all = 0 Then
Cells(35, i) = 0
Else
Cells(35, i) = cnt_f_n2_2_liq * 100 / cnt_f_n2_2_all
Cells(35, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n2_3_all = 0 Then
Cells(36, i) = 0
Else
Cells(36, i) = cnt_f_n2_3_liq * 100 / cnt_f_n2_3_all
Cells(36, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n2_4_all = 0 Then
Cells(37, i) = 0
Else
Cells(37, i) = cnt_f_n2_4_liq * 100 / cnt_f_n2_4_all
Cells(37, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n3_1_all = 0 Then
Cells(44, i) = 0
Else
Cells(44, i) = cnt_f_n3_1_liq * 100 / cnt_f_n3_1_all
Cells(44, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n3_2_all = 0 Then
Cells(45, i) = 0
Else
Cells(45, i) = cnt_f_n3_2_liq * 100 / cnt_f_n3_2_all
Cells(45, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n3_3_all = 0 Then
Cells(46, i) = 0
Else
Cells(46, i) = cnt_f_n3_3_liq * 100 / cnt_f_n3_3_all
Cells(46, i).NumberFormat = "#,##0.00"
End If
If cnt_f_n3_4_all = 0 Then
Cells(47, i) = 0
Else
Cells(47, i) = cnt_f_n3_4_liq * 100 / cnt_f_n3_4_all
Cells(47, i).NumberFormat = "#,##0.00"
End If
Next i
cnt_f_1_liq = 0
cnt_f_2_liq = 0
cnt_f_3_liq = 0
cnt_f_4_liq = 0
cnt_f_1_all = 0
cnt_f_2_all = 0
cnt_f_3_all = 0
cnt_f_4_all = 0
cnt_f_n0_1_liq = 0
cnt_f_n0_2_liq = 0
cnt_f_n0_3_liq = 0
cnt_f_n0_4_liq = 0
cnt_f_n0_1_all = 0
cnt_f_n0_2_all = 0
cnt_f_n0_3_all = 0
cnt_f_n0_4_all = 0
cnt_f_n1_1_liq = 0
cnt_f_n1_2_liq = 0
cnt_f_n1_3_liq = 0
cnt_f_n1_4_liq = 0
cnt_f_n1_1_all = 0
cnt_f_n1_2_all = 0
cnt_f_n1_3_all = 0
cnt_f_n1_4_all = 0
cnt_f_n2_1_liq = 0
cnt_f_n2_2_liq = 0
cnt_f_n2_3_liq = 0
cnt_f_n2_4_liq = 0
cnt_f_n2_1_all = 0
cnt_f_n2_2_all = 0
cnt_f_n2_3_all = 0
cnt_f_n2_4_all = 0
cnt_f_n3_1_liq = 0
cnt_f_n3_2_liq = 0
cnt_f_n3_3_liq = 0
cnt_f_n3_4_liq = 0
cnt_f_n3_1_all = 0
cnt_f_n3_2_all = 0
cnt_f_n3_3_all = 0
cnt_f_n3_4_all = 0
End Sub