Help Plz If U Can

Private intX As Integer
Private charGrade(30) As Char
Private strMark As String
Private intTotal, intMax As Integer
Private intStudents As Integer
Private dblpercent As Double
Private strGrade As String

Private Sub btnStart_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnStart.Click

intStudents = (Convert.ToInt32(txtNumberOfStudents.Text))
INTMAX = (Convert.ToInt32(txtCourseMarks.Text))
For intX = 0 To (intStudents - 1)

intX = Convert.ToInt32(InputBox("Please enter the students mark"))
intTotal = intTotal + intX


dblpercent = Convert.ToInt32(strMark) / 100 * intMax


If Me.radDay.Checked Then

If dblpercent >= 90 Then
strGrade = "A"
ElseIf dblpercent >= 80 Then
strGrade = "B"
ElseIf dblpercent >= 70 Then
strGrade = "C"
ElseIf dblpercent >= 60 Then
strGrade = "D"
ElseIf dblpercent < 60 Then
strGrade = "F"
End If

Else
If dblpercent >= 85 Then
strGrade = "A"
ElseIf dblpercent >= 75 Then
strGrade = "B"
ElseIf dblpercent >= 65 Then
strGrade = "C"
ElseIf dblpercent >= 50 Then
strGrade = "D"
ElseIf dblpercent < 50 Then
strGrade = "F"
End If
End If

charGrade(intX) = (Convert.ToChar(strGrade))


Next
For intX = 0 To intStudents - 1
Label3.Text = Label3.Text & charGrade(intX).ToString & ControlChars.NewLine
Next
End Sub
End Class

THE INPUT BOX LINE AND LINE BELOW IT KEEP MAKING MY CODE STOP COULD ANY 1 PLZ OFFER ME SOME HELP
THANKS

Check out the post on this page that's called "Adding to my Array (some help plz)"

Your classmate has managed to do it.

the code he has is different. my code will not loop it stops when it reaches these two lines:

intX = Convert.ToInt32(InputBox("Please enter the students mark"))
intTotal = intTotal + intX


i dnt knw why~??

can any 1 offer any help on hw to solve this without copying laviskings code

Look at these lines:

vb Code:

For intX = 0 To (intStudents - 1)
 
    intX = Convert.ToInt32(InputBox("Please enter the students mark"))

Do you see the conflict? When you want intX to increment in steps of 1 you actually then assign it a student's mark so it could be 99 straight after so it would never loop.

What you want to do is something like this:

vb Code:

For i As Integer = 0 to intStudents - 1
 
'THEN further down, change this: 
  charGrade(i) = (Convert.ToChar(strGrade))

As for lavisking's code being alot different - ha ha.

WHEN U SAY TO CHANGE THEM BITS WILL IT LOOP AND AD A NEW GRADE INTO A DIFFERENT PART THE ARRAY ARE WILL IT OVER WRITE THE ONE PART

For i As Integer = 0 to intStudents - 1
'THEN further down, change this: charGrade(i) = (Convert.ToChar(strGrade))

Have you tried it? Just as a small test - enter 4 scores/numbers or something

What's the purpose of a loop like that above.... Increments through a NEW index value each time.