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Argument Not Optional message in VB
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Sorry, I am a beginner at Visual Basic, and have had to create this project as part of a school task. It keeps coming up with "argument not optional" on the calls tp checkcards and determinewinnings. I don't knkow what this means really, and I don't know how to fix it. Can you help??
Here is the code:
Here is the code:
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
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Originally Posted by Nomiree
Sorry, I am a beginner at Visual Basic, and have had to create this project as part of a school task. It keeps coming up with "argument not optional" on the calls tp checkcards and determinewinnings. I don't knkow what this means really, and I don't know how to fix it. Can you help??
Here is the code:
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
*******************************************************
where are trying to compare the values of:
If intcard1 = intcard2 = intcard3 = intcard4 ???
if you want to compare the four values try doing this:
if intcard1 = intcard2 and intcard1 = intcard3 and intcard1 = intcard4 then that will be for 4 of the same...(hope i am right)
now for the 3 of the same:
if intcard1 = intcard2 and intcard1 = intcard3 or intcard1 = intcard3 and intcard1 = intcard4 then
hope that one works for you...good luck.
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Join Date: Jun 2005
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Junior Poster in Training
'argument not optional' basically just means 'you can't do it like this'.
For all these comparisons, you could use other methods such as Select Case, or loops within loops, to make the code easier to read, but of course that comes with experience.
One thing I think I should point out is, when you declare several variables on the same line, you need to state the variable type for each one. If the VarType is not stated, it will default to the Variant type.
e.g.
Dim intCard1, intCard2, intCard3, intCard4 As Integer .....incorrect
Dim intCard1 As Integer, intCard2 As Integer, intCard3 As Integer, intCard4 As Integer......Correct
For all these comparisons, you could use other methods such as Select Case, or loops within loops, to make the code easier to read, but of course that comes with experience.
One thing I think I should point out is, when you declare several variables on the same line, you need to state the variable type for each one. If the VarType is not stated, it will default to the Variant type.
e.g.
Dim intCard1, intCard2, intCard3, intCard4 As Integer .....incorrect
Dim intCard1 As Integer, intCard2 As Integer, intCard3 As Integer, intCard4 As Integer......Correct
if you are getting this where you say, it means that checkcards wants a variable sent to it:
you may want to create a global variable for the cards so you won't have to worry about passing parameters to subs.
or you may want to declare the variables as integer in the sub
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
Visual Basic 4 / 5 / 6 Syntax (Toggle Plain Text)
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Join Date: Jun 2005
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Junior Poster in Training
Yes, if these variables are not used in any other forms it would be simpler to declare them with the Dim statement directly after 'Option Explicit', instead of inside the sub.
As far as I know, if you declare a variable inside a sub, it is not recognised anywhere else, even if you use Global or Public. Someone please correct me if I'm wrong !
As far as I know, if you declare a variable inside a sub, it is not recognised anywhere else, even if you use Global or Public. Someone please correct me if I'm wrong !
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*Nods*
jwshepherd is hitting real close to home with that. You should take his advice.
jwshepherd is hitting real close to home with that. You should take his advice.
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A global variable has to be defined in a code module. A local variable gets dimensioned within the sub, and it's "scope" only extends within the sub. A Public Variable gets declared within the declarations section of the form, and it's scope is all procedures in the form. So, if you need a temporary variable, that only needs to be used in one procedure... use dim in that procedure. If you need a variable that the form can use... say, a variable that an OK and Cancel button can both have access to, then you would need a public/form-wide variable. If you want one that the entire project can use (spanning multiple forms) then you need a global variable (declared in a module).
Yes Comatose is correct.
If int1 is declared in a sub, it's value can only be used in that sub. ONce the program leaves that sub, the value is erased.
I forgot to tell you to add a module to your project to add the global variables.
Good luck
If int1 is declared in a sub, it's value can only be used in that sub. ONce the program leaves that sub, the value is erased.
I forgot to tell you to add a module to your project to add the global variables.
Good luck
.: We may acquire liberty, but it is never recovered if it is lost :.
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You can add all kinds of great stuff in code modules too. You can have functions and subs accessible by the entire program, along with variables, constants, type declarations, and API calls. As soon as I start a new project, I add a code module (it's actually a standard module I built so that VB can use certain subs and functions that come in other language [such as push and pop]) right off the bat, so that I know I at least have one...
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