Re: I don't understand the SWITCH command Š

[Jan Schenkel]

--- François Cuneo <francois.cuneo at cuk.ch> wrote:
> Hello everybody!
> I have a problem with the "Switch" command.
> Here is my little Code:
> 
> on mouseup
>   put word 2 of the selectedline of me into nbcalc
> 
>   switch nbcalc
> 
>   case 1
>     put 0 into fld "nbcalc"
> 
>   case 2
>     
>     put 2 into fld "nbcalc"
>   end switch
>   
> end mouseup
> 
> It's always the case 2 that's done, even if the
> nbcalc is 1!
> What's wrong please?
> 
> 
> Amicalement
> François
> 

Bonjour François,

You'll need to insert a 'break' command at the right
spots ; so your script should look like :

on mouseup
  put word 2 of the selectedline of me into nbcalc
  switch nbcalc
  case 1
    put 0 into fld "nbcalc"
    break
  case 2
    put 2 into fld "nbcalc"
    break
  end switch
end mouseup

If you don't use a 'break' command, the engine will
just execute the rest of the script in each case until
it bumps into a break.
It has its advantages, for instance when you need to
do something extra in special cases, but it can be a
bit confusing if you don't have a background in C.

Example :
--
  switch tNumber
  case 3
    -- only do the following
    ...
    break
  case 2
    -- do something special, as well as the code
    -- for case tNumber = 1
    ...
    -- so no 'break' at this point
  case 1
    -- do what needs done in this case
    ...
    -- and break since we don't want the default
    break
  default
    -- if none of the other cases are true
    ...
    -- the break isn't necessary, but cleaner code
    break
end switch
--

Hope this helped,

Jan Schenkel.

=====
"As we grow older, we grow both wiser and more foolish at the same time."  (La Rochefoucauld)

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