Displaying variables in a standard menu?

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Summary:

I want to insert a variable into some of the menu options in the Menu() function.

Displaying variables in a standard menu?

lupus6x9 16 May 2008 23:36

I want to insert a variable into some of the menu options in the Menu() function.

If you know PHP, here's an example of what I want in that form.

:15→W
:17→F
:Menu("WHAT TO BUY?","WATER (".$W.")",1,"FOOD (".$F.")",2)

Basically, to produce

WHAT TO BUY?
1:WATER (15)
2:FOOD (17)

How can I accomplish this? I get an error every time I try to insert a variable. I have tried using the period to denote between the quotes, a plus sign, and just nothing at all, and I always get an error.

Thanks in advance for the help!

Last edited on 16 May 2008 23:37 by lupus6x9 Show more

Re: Displaying variables in a standard menu?

GoVegan 17 May 2008 00:23

Yeah, there is a way!!!

So you want the menu to display a real variable. You see, the menu displays STRINGS ONLY. That is a hint, to display a variable, store the variable as part of a string variable. What you need to do is insert the number-to-string routine:

:W
:For(X,1,3
:Ans→N
:{0,1→L₁
:{0,N→L₂
:LinReg(ax+b) Y₁
:Equ►String(Y₁,Str0
:sub(Str0,1,length(Str0)-3
:If X=1:Then
:"WATER ("+Ans+")→Str1
:F:End
:If X=2:Then
:"FOOD ("+Ans+")→Str2
:C:End
:If X=3:"CHARITY ("+Ans+")→Str3
:End
:Menu("WHAT TO BUY?",Str1,1,Str2,2,Str3,3

If W=15, F=17 and C=100, then this will display:

WHAT TO BUY?
1:WATER (15)
2:FOOD (17)
3:CHARITY (100)

Does that solve your problem?

Cheers ~ James Kanjo

Last edited on 17 May 2008 00:37 by GoVegan Show more

Re: Displaying variables in a standard menu?

burr 20 May 2008 11:59

Another alternative available is making your own custom menu on the graph screen using the Text( command, which allows you to have multiple arguments of varying types (reals, lists, strings, etc.).

Re: Displaying variables in a standard menu?

GoVegan 21 May 2008 03:22

Yes, if not using the Menu( command, a custom menu would be much more efficient - in terms of memory optimisation. It is easier to do too.

Cheers ~ James Kanjo

Re: Displaying variables in a standard menu?

Jonathan King 17 May 2008 00:26

Sorry, there is no way to do that, short of converting the number to a string, because the menu only accepts string input. ;( Stupid menus… I just make my own.

Re: Displaying variables in a standard menu?

GoVegan 17 May 2008 00:39

What are you talking about? Didn't you just see my above solution?

Re: Displaying variables in a standard menu?

Jonathan King 17 May 2008 16:18

sorry, your post didn't show up till after I hit "post".

Re: Displaying variables in a standard menu?

Weregoose 17 May 2008 00:41

The menu title and text can be replaced by string variables, or expressions like Str1+sub(Str2,1,2) which return strings. When used in combination with the number to string routine, what you're asking becomes a real possibility.

[EDIT]

Grr… Ajax failed about 10 times when I was trying to send my reply. :)

Last edited on 17 May 2008 00:43 by Weregoose Show more

Re: Displaying variables in a standard menu?

GoVegan 17 May 2008 00:48

Yeah, I just said that! Have my posts suddenly become invisible to everybody?

Re: Displaying variables in a standard menu?

lupus6x9 18 May 2008 01:57

Well, at least not to me. Thank you, this is what I needed.

Although this is a DIFFERENT question, I don't really think it's necessary to create a whole other topic for it. I know this is also simple, but I don't know exactly how.

I'm trying to create a game that involves lots of variables, ones that are saved after you're done playing for the day so that you can resume gameplay the next time you access the program on your calculator. The problem is, I want to be able to have multiple game saves, but I have lots, like I said, of variables. Can I create a list of variables for user storage? I don't at all know how to use lists, but, if I can, this would be great. I just need to know how to store a list of variables (say A, B, C, D, and E) in a list, and then later grab their values from the list to assign them again to the gameplay (such as from List[A,B,C,D,E] to variables A, B, C, D, and E or something with a similar effect).

If there's a tutorial about this on this Wiki, you can just link me to that too. Thanks!

EDIT—I found the saving page, so nevermind then.

Last edited on 18 May 2008 02:08 by lupus6x9 Show more