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07.02.2008 at 02:05PM PDT, ID: 23535145
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9.0

Get out of Loop

Asked by Dan-LL in Visual Basic Programming, Programming Languages

Tags:

I have a very basic random number program that works like putting raffle tickets out of a hat, the pulled numbers are stored in a txt file with each number on a newline.

Each time a new random number is picked it searches the txt file to ensure it has not already been picked before.

My problem is say 98 tickets have been sold and the software is ran 99 times it is going to crash out as all the numbers in the txt file have been used once already. Any idea's how I can control or prevent the crash.

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# picks a number from first to last ticket sold
MyCalling = Int((bfinish - bstart) * Rnd + bstart)
 
# opens number txt file of called so far numbers and seraches it
Open "called" & BookCol & ".txt" For Input As 1
txtFile = "called" & BookCol & ".txt"
 
While Not EOF(1)
            Line Input #1, strTemp
            txtFile = txtFile & strTemp & vbCrLf
            Wend
        Close #1
 
txtfind = MyCalling
 
# use of not use number picked
    If txtfind <> "" Then
        If InStr(txtFile, txtfind) <> 0 Then
         GoTo PickingBook
         called.Text = MyCalling
        Else
            calling.Text = MyCalling
            bookused.Caption = frombook
            sernum.Caption = bserial
        End If
    End If
    
    Close #1
 
# if number is ok and called, write it to file so it can't be used again
Open "called" & BookCol & ".txt" For Append As 1
Print #1, calling.Text
Close #1
 
 
 
I have added some #comments to help with my very poor code.
[+][-]07.03.2008 at 09:58AM PDT, ID: 21927250

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[+][-]07.03.2008 at 11:09AM PDT, ID: 21927821

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[+][-]07.03.2008 at 11:21AM PDT, ID: 21927915

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[+][-]07.03.2008 at 12:00PM PDT, ID: 21928168

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[+][-]07.03.2008 at 12:08PM PDT, ID: 21928234

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[+][-]07.03.2008 at 12:12PM PDT, ID: 21928264

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[+][-]07.03.2008 at 12:21PM PDT, ID: 21928323

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[+][-]07.03.2008 at 12:24PM PDT, ID: 21928348

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[+][-]07.03.2008 at 12:37PM PDT, ID: 21928419

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[+][-]07.03.2008 at 12:42PM PDT, ID: 21928445

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[+][-]07.03.2008 at 12:47PM PDT, ID: 21928478

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About this solution

Zones: Visual Basic Programming, Programming Languages
Tags: Visual Basic 4
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Solution Provided By: TRobinJames
Participating Experts: 1
Solution Grade: A
 
 
 
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