[RESOLVED] VB6 Lottery

Hello. I'm pretty much new to VB and I'm currently on an IT course at college. In one of our units we are learning VB and I've been trying to do this task which has started to prove quite difficult. I've tried to seek advice and help from tutors and fellow students, but the students are quite disruptive in class except a few and our tutors just got changed.

I basically have to create a lottery program, that will have a button that creates 6 random numbers in text box lbls and a button for the bonus ball, as well as a sort button to sort the 6 numbers in ascending order. I've done all of this except, my 6 numbers sometimes turn out the same as well as the bonus ball and my reset button resets all 6 to 0.

Any help would be appreciated, as I'm really lost right now and kind of in the deep end with all this being so new to me. Heres what I have so far. I've tried variations of generating the 6 numbers but this is what I originally had.
-------------------------------------------------------------------------

Dim Values(1 To 6) As Integer

Private Sub cmdReset_Click() 'Resets lottery numbers'
lbl1.Caption = "0"
lbl2.Caption = "0"
lbl3.Caption = "0"
lbl4.Caption = "0"
lbl5.Caption = "0"
lbl6.Caption = "0"
cmdReset.Visible = False 'Reset button is invisible'
End Sub

Private Sub cmdBonus_Click()
Randomize
Dim counter As Integer
lblBonus.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl1.Caption Or lbl2.Caption Or lbl3.Caption Or lbl4.Caption Or lbl5.Caption Or lbl6.Caption Then
lblBonus.Caption = Int(Rnd * 16 + 1)
End If

Next

End Sub

Private Sub cmdBalls_Click()
Randomize
Dim counter As Integer
cmdReset.Visible = True
lbl1.Caption = Int(Rnd * 16 + 1)
lbl1.Caption = Values(1)
lbl2.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl2.Caption Then
lbl2.Caption = Int(Rnd * 16 + 1)
counter = 1
End If

Next

lbl3.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl3.Caption Then
lbl3.Caption = Int(Rnd * 16 + 1)
counter = 1
End If

Next

lbl4.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl4.Caption Then
lbl4.Caption = Int(Rnd * 16 + 1)
counter = 1
End If

Next

lbl5.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl5.Caption Then
lbl5.Caption = Int(Rnd * 16 + 1)
counter = 1
End If

Next

lbl6.Caption = Int(Rnd * 16 + 1)
For counter = 1 To 6
If Values(counter) = lbl6.Caption Then
lbl6.Caption = Int(Rnd * 16 + 1)
counter = 1
End If

Next

End Sub


Private Sub cmdSort_Click()
Dim counter As Integer
Dim sortcount As Integer
Dim sort As Integer

counter = 1
sortcount = 1

Do Until counter = 100
sortcount = 1
Do Until sortcount = 6
If Values(sortcount) > Values(sortcount + 1) Then
sort = Values(sortcount)
Values(sortcount) = Values(sortcount + 1)
Values(sortcount + 1) = sort
End If
sortcount = sortcount + 1
Loop
counter = counter + 1
Loop
lbl1.Caption = Values(1)
lbl2.Caption = Values(2)
lbl3.Caption = Values(3)
lbl4.Caption = Values(4)
lbl5.Caption = Values(5)
lbl6.Caption = Values(6)

End Sub

First, you're telling the Reset command to make all the labels 0.

Second, you'd be better off using a control array of labels. It would make analyzing them a hell of a lot easier.

Oh wait.... sorry.... I meant sort button.... my sort button resets all numbers to 0 lol.... really tired ><

An array huh? Well I'll give that a shot, I'm going to be ringing my friend in a min.... hes working on it too. Hes had more experience but decided to do it that way and helped me a bit with it. I'll probably mention an array to him, as we are more less at the same point.

Thanks for that..... hopefully I can get somewhere now.

Welcome :wave:

In addition, i don't believe that the "If Values(counter) = ...Or...Or...Or" statement you have does what you think it does. You need to compare each one:

VB Code:

'...
If Values(counter) = lbl1.Caption Or Values(counter) = lbl2.Caption Or Values(counter) = lbl3.caption '...
'...

I remember making that mistake when i first started coding... gotta remember that conditions don't carry on in the statement. you have to check everything manually.

Quote:

---

Originally Posted by timeshifter

I remember making that mistake when i first started coding... gotta remember that conditions don't carry on in the statement. you have to check everything manually.

---

Exactly. If you do it the way he did it (...value Or value...) Or returns a number, which would lead to type mismatch error.

Thanks, I really appreciate the help. I'll let you know how things go, got quite a few assignments going on here, so this is greatly appreciated.

I think this is the gist of what you're after... uses a control array of labels and a simple binary sort to get them in order. Works like a charm. I hope it's what you're looking for. Easy code, too. :wave:

Wow thankyou. This has really helped me. Thanks so much, exactly what I was looking for.

I think I can finally start getting my heard around this VB lol.

Glad to be of service.

@timeshifter - you need to check that the numbers haven't already been used the array. I've just spun it and it came up with 3 40's. ;)

Well, I can't straight up give him everything, can I? If it's an assignment... What I posted is a solid base that knocks out the sorting, which is generally the roughest part of something like this. Adding that in will be a good learning experience for him.

Thats Ok I didn't want him to think you had cracked it for him. ;)

Quote:

---

Originally Posted by Phurbu

Thanks so much, exactly what I was looking for.

---

Wow, that is a lot of code! Why not just use a random number generator fixed to generate numbers between two limits?

In other words, use this function:

VB Code:

Public Function intRandomBetween(ByVal lowerNum As Integer, ByVal higherNum As Integer) As Integer
 
    intRandomBetween = Int((higherNum - lowerNum + 1) * Rnd + lowerNum)
 
End Function

and then put this in a button to generate the numbers, and assign them to 6 different labels:

VB Code:

Dim gennums As String
    Dim lng As Long
    Dim newnum, high, low As Integer
    
    high = 53
    low = 1
    
    For lng = 1 To 6
            Do
            newnum = intRandomBetween(low, high)
                If Not InStr(gennums, "," & newnum & ",") > 0 Then gennums = gennums & newnum & ",": Exit Do
            Loop
    Next
    
    Label1.Caption = Split(gennums, ",")(0)
    Label2.Caption = Split(gennums, ",")(1)
    Label3.Caption = Split(gennums, ",")(2)
    Label4.Caption = Split(gennums, ",")(3)
    Label5.Caption = Split(gennums, ",")(4)
    Label6.Caption = Split(gennums, ",")(5)

Here is a way to produce six, unique, random numbers.

VB Code:

Dim colRandom As New Collection
Dim intTry As Integer
 
Randomize
 
On Error Resume Next
 
Do Until colRandom.Count = 6
    ' Generate the random number
    intTry = Int(Rnd * 16 + 1)
    ' Attempt to add it to the collection along with a matching key
    colRandom.Add intTry, CStr(intTry)
    If Err.Number = 457 Then
        ' The key is already in the collection so it isn't added again
    End If
Loop
 
For intTry = 1 To 6
    Debug.Print colRandom(intTry)
Next

If he's just learning, why make it so complicated? Generate a number, test it against the other numbers in the array, and if there's a match, generate a new number. Repeat process. Too easy.

Quote:

---

Originally Posted by timeshifter

If he's just learning, why make it so complicated? Generate a number, test it against the other numbers in the array, and if there's a match, generate a new number. Repeat process. Too easy.

---

That's what my code does :confused:

Quote:

---

Originally Posted by timeshifter

If he's just learning, why make it so complicated? Generate a number, test it against the other numbers in the array, and if there's a match, generate a new number. Repeat process. Too easy.

---

It's not complicated, and in fact it's quite straightforward.

Quote:

---

Originally Posted by BrendanDavis

Wow, that is a lot of code! Why not just use a random number generator fixed to generate numbers between two limits?

---

It's maybe a few lines of code more, but, what does a complete beginner (as he said he is) know about InStr(), Split()... timeshifter's code is much more... easy... for him - perhaps he understands it, not just copy-pastes it...

It has few loops, few arrays and uses Rnd() which is the whole point of this app, and that's it... Quite simple and effective :)

Thank you somebody for seeing the point...

In addition:

VB Code:

Label1.Caption = Split(gennums, ",")(0)
'...
Label6.Caption = Split(gennums, ",")(5)

... is a bad practice. Create/split an array and loop through it... It's about 5 times faster with 1000 iterations and creates only 1 instead of 6 arrays with each iteration ;)

Again, my code does that...

Quote:

---

Originally Posted by gavio

In addition:

VB Code:

Label1.Caption = Split(gennums, ",")(0)
'...
Label6.Caption = Split(gennums, ",")(5)

... is a bad practice. Create/split an array and loop through it... It's about 5 times faster with 1000 iterations and creates only 1 instead of 6 arrays with each iteration ;)

---

I thought about doing that but I changed it last minute for the sake of time. I had to go christmas shopping, lol.

As for being a beginner: nothing wrong with martin or I's code being too complex. Everything I used was basic VB knowledge that he should learn eventually, and it's not all that complex either. It's all a matter of how fast someone learns, really. I would rather someone give me the best (or one of the best) ways to do something right off the bat, and have them explain it to me, rather than show me a less efficient way to do something just because I'd understand it better with less explanation. But again, that's me and everyone's different.

Another alternative, which addresses the uniqe numbers issue, is to store all numers in an array, if there are sixteen numbers then create an array from index 0 to 15... on app start the array is initialized with values from 1 to 16 sorted, you now have a list of unique numbers... you then create a procedure that "shuffles" these sixteen numbers such as in http://www.vbforums.com/showthread.php?t=440551

After the numbers have been shuffled, just get the first six numbers and show these in your lables. Every time you need to generate another set of random numbers, just call your "shuffle" procedure.

Your sort procedure will work on the same array but will only sort the first 6 numbers ignoring the rest of the values.

You end up working with only one data structure which makes everything easy.

Quote:

---

Originally Posted by BrendanDavis

VB Code:

Dim gennums As String
    Dim lng As Long
    Dim newnum, high, low As Integer

---

Only low will be an Integer, newnum and high will be Variants. ;)

VB Code:

Dim newnum As Integer, high As Integer, low As Integer

Exactly. I think this behavior has been fixed in .NET.

Wow. Thankyou so much for all of your input, if theres ever anything I can do to repay you or if I'm able to help out in anyway let me know. Not much of a programmer at the moment though, so can't help much in that area but in time I should be able to, especially thanks to all of your help.

I'm going to try out some of things you all have mentioned and go over my program later on when I get back from the whole Xmas shopping thing lol.

You all have deffinately proved much more help than my tutor, greatly appreciated. Thanks again. :)

You're welcome :wave:

If you concider this to be resolved then please pull down the 'Thread Tools' menu and click 'Mark Thread Resolved' so people will know you got your answer ;)