[RESOLVED] New to VB 6! Can't code this program.. :(

[vert]

Ok, here are the details... I've spent hours trying to code this simple program but it refuses to work... I am completely new to this and am starting to think that i'm a little too stupid to learn vb..

1) This is a hotel reservation system and the hotel name is constant. Let say Hilton.

2) Initially, the program will contain 10 guest names already. I tried using array but I've no idea what to do next..

3) The program then asks for the names and will validate them before the guests will be able to book a room. Error will be generated when the name is wrongly inserted and the thing will loop over and over asking for reentry of name. (Here.. I tried using the "do while.. loop" but it doesn't recognise my array)

4) The guests will then have to choose between 10 rooms and an error will be generated if the rooms were booked already. (How is this even possible? Do I just pick a random rooms as full already or is there a proper way?) Again, the thing will ask for another room and loops.

5) Finally, all the details about one guest's booking (the one that "log in") will be displayed. Do I use picturebox for this?

As an additional note, how, do I use subprograms and parameter passing in this? I've read the vb for dummies book but I still am clueless...

I just don't understand the concept of parameter passing or subprograms. I will really appreciate it if anyone can help a newbie here. If possible, don't give explanations that are too hard to follow since I've asked my friend who works in the IT industry and he suggested that I use access to store the guest details... lol.. I only need a simple program...

I know I've been rambling for a bit.. sorry!

Thanks!

[dclamp]

Welcome to vbf!

If this is a School assignment, then we cannot help you write the program, we wont write the whole program any way.

We will only help with specific questions...



Have you thought about using a Database?

[vert]

Nah, i don't expect you guys to write the code, more like point me at the right direction..

For the array I tried and use..

Dim guest(10) as string

Guest(0) = name1
Guest(1) = name 2

and so on..

The problem comes when I tried to do the do..while loop..

valid = InputBox("Who are you?")

Do While valid <> guest(10) -----> It won't recognise this..why?
valid = InputBox("reenter")
Loop

[dclamp]

I am not good with arrays, but i am guessing that dimming "guest(10)" is not proper.

Try this:

Dim guest() as String 

And use [vbcode ] [ /vbcode] tags

[Vntalk]

I guess it's because dim guest(10) = start from 0 ...9
so 10 is not valid

[si_the_geek]

The array declaration is fine, and by definition there is an element 10 (the number in the Dim line is not the amount of items, but the index of the last item).

vert, try to be very specific about the problems you are having... dclamp and Vntalk have assumed that you are getting an error message pop up, but I dont think you are - I think it just isn't working as you want it to.

As you currently have it, you are only comparing to one of the guests ( guest(10) ), instead of checking if it is any of them. To do that you need to use a loop.

I would recommend looking at this FAQ thread which explains about arrays, and how to use them. (you will probably find other useful info in our Classic VB FAQ's, link below).

[vert]

Oh, I thought by using ( guest(10) ), or 9 perhaps, I will be comparing it from 0-9..all at once...

That page seems very helpful... but I still don't understand it.. how do you include every array in the input validation?

it's about 12 am now so im going to go..

I will update on my progress tomorrow...

[dclamp]

Originally Posted by vert

Oh, I thought by using ( guest(10) ), or 9 perhaps, I will be comparing it from 0-9..all at once...

That page seems very helpful... but I still don't understand it.. how do you include every array in the input validation?

it's about 12 am now so im going to go..

I will update on my progress tomorrow...

Im not sure how to do this in vb, but you are going to have to make it so that the integer within guest() is greater than 1 and less than 10

[MarkT]

See if this gets you going in the right direction

Option Explicit
Dim strGuests(4) As String

Private Sub Command1_Click()
Dim blnValid As Boolean
Dim strInput As String
Dim i As Integer

    Do
        'Get the name
        strInput = LCase(InputBox("Who are you?"))
        'Check if the name is in the array
        For i = 0 To 4
            If LCase(strGuests(i)) = strInput Then
                blnValid = True
                Exit For
            End If
        Next i
    'Loop while a valid name has not been entered
    Loop While Not blnValid
    
    MsgBox "valid name"
End Sub

Private Sub Form_Load()
    strGuests(0) = "Vert"
    strGuests(1) = "dclamp"
    strGuests(2) = "vntalk"
    strGuests(3) = "si_the_geek"
    strGuests(4) = "MarkT"
End Sub 

[smUX]

There have been suggestions made in the past about ways to quick-search an array. If the array is fixed, my suggestion has always been to set up a string with each entry in it and a * on either side of the name...as in "*Vert*dclamp*vntalk*si_the_geek*MarkT*"...then when you are checking for a name you instr for "*" & name & "*" and it should return 0 if the name isn't in there. Downside to that is it doesn't return the location (so you will only know it is a valid name, not which one in the array is that name). It's a lot of work for a simple bit of code though, and if you want to go the easy way then a loop would be the better option.

I'd go with a simple loop in this case :-)

[Al42]

When addressing an array it's always better to use LBound(ArrayName) and UBound(ArrayName) as the lower and upper element numbers. That way, if you have to change the number of elements in the array you won't have to go through your code changing every occurrence of the lower or upper element number.

[vert]

Originally Posted by MarkT

See if this gets you going in the right direction

Option Explicit
Dim strGuests(4) As String

Private Sub Command1_Click()
Dim blnValid As Boolean
Dim strInput As String
Dim i As Integer

    Do
        'Get the name
        strInput = LCase(InputBox("Who are you?"))
        'Check if the name is in the array
        For i = 0 To 4
            If LCase(strGuests(i)) = strInput Then
                blnValid = True
                Exit For
            End If
        Next i
    'Loop while a valid name has not been entered
    Loop While Not blnValid
    
    MsgBox "valid name"
End Sub

Private Sub Form_Load()
    strGuests(0) = "Vert"
    strGuests(1) = "dclamp"
    strGuests(2) = "vntalk"
    strGuests(3) = "si_the_geek"
    strGuests(4) = "MarkT"
End Sub 

That helps a lot! Thanks!

I think this will be enough to start me off.