实现该功能的VB程序如下，但加框处代码有错，请改正。

Dim nam(100) As String '存放学生姓名

Dim sex(100) As String '存放学生性别

Dim math(100) As Long '存放学生数学成绩

Dim su(100) As Long '存放学生总分成绩

Dim k As Integer 'k变量用来存学生人数

Private Sub Form_Load()

‘将数据库中的数据分别存储在相应的变量中并在列表框中显示出来

‘代码略

End Sub

Private Sub Command1_Click()

Dim mmax As Integer, gmax As Integer, flagm As Boolean, flagg As Boolean

i = 1: flagm = True: flagg = True

Do While i <= k And flagm = True ①   

    mmax = 0: gmax = 0

    flagm = False: flagg = False

  For j = i To k - i + 1

    If sex(j) = "男" And su(j) > su(mmax) Then mmax = j

    If sex(j) = "女" And su(j) > su(gmax) Then gmax = j

  Next j

   If mmax <> 0 Then

flagm = True

t = nam(mmax): nam(mmax) = nam(i): nam(i) = t

t = sex(mmax): sex(mmax) = sex(i): sex(i) = t

t = math(mmax): math(mmax) = math(i): math(i) = t

t = su(mmax): su(mmax) = su(i): su(i) = t

   End If

   If gmax <> 0 Then

flagg = True

If j = mmax Then    ②   

gmax = mmax

t = nam(gmax): nam(gmax) = nam(k - i + 1): nam(k - i + 1) = t

t = sex(gmax): sex(gmax) = sex(k - i + 1): sex(k - i + 1) = t

t = math(gmax): math(gmax) = math(i): math(i) = t

t = su(gmax): su(gmax) = su(k - i + 1): su(k - i + 1) = t

Else

t = nam(gmax): nam(gmax) = nam(k - i + 1): nam(k - i + 1) = t

t = sex(gmax): sex(gmax) = sex(k - i + 1): sex(k - i + 1) = t

t = math(gmax): math(gmax) = math(k - i + 1): math(k - i + 1) = t

t = su(gmax): su(gmax) = su(k - i + 1): su(k - i + 1) = t

End If

   End If

i = i + 1

Loop

For i = 1 To k

List2.AddItem nam(i) + "    " + sex(i) + "    " + Str(math(i)) + "    " + Str(su(i))

Next i

End Sub