OpenEuphoria

Re: Newcomer with a problem

• Posted by Tom Eklvf <darkspace at HOTMAIL.COM> Jan 25, 1998
• 581 views

>Hello, everyone.  I'm new to Euphoria, and have been having a problem
>that I can't seem to find the answer to in the documentation.  It's
>probably there, I'm just horrible at finding things like that.
>
>I'm wondering about function and procedure declaration.  Currently,
>I've got a function and a procedure.  They both call the other at one
>point in their block, but because one appears before the other, the
>interpreter says the second one is undefined (and therefore will not
>continue running the program).
>
>I know that C++ has function prototypes.  Does Euphoria have anything
>similar that allows for function/procedure/type declarations?
>
>Here's a sample of the code for the function and procedure, although
>I don't feel it will be relevant (and yes, I do realize it's probably
>not done in the most efficient manner.  I'm new, after all!):
>
>procedure check_menu_input(integer x)
> if x < 1 or x > 2 then
>  menu()
>-- The line above is the problem causing line.  The interpreter says
>-- menu() has not yet been declared.
And the interpreter's right :) You see, you _HAVEN'T_ declared menu()
yet.

*SNIP*

>function menu()           <---- This is where you declare menu()
*SNIP*
>end function

So, all you have to do is to declare menu() before check_menu_input()
like so:

function menu()
codecodecode
end function

procedure check_menu_input()
codecodecode
end procedure

I think you could also use routine_id() to get over the problem, but I
don't know how to use it, so you'll have to consult library.doc for more
help.


-Tom


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