Re: cat and mouse

["Daniel Ajoy" <da.ajoy@xxxxxxxxx>]

On Thu, 20 Mar 2008 13:43:36 -0500, Tamara Weinstein 
<tamaraw@xxxxxxxxxxxxxxxxxxxxxx> wrote:

> i changed some things but it still isn't working.  i have now put the
> cheese instructions in the cheese's backpack.
> let me know what else you find
> thanks
> tw
>

Hi Tamara,


When the mouse touches the cheese the following procedure is run:


to yum
if touchedturtle = "mouse
setsize 100
wait 20
announce [You got to the mousehole!]
end

and the following error is issued:


setsize didn't report anything to if in yum


That is a because *something* is expecting "setsize" to report something.

More specifically, "if" is expecting "setsize" to report something. That is 
because "if" expects to receive *two* things:

if condition instruction.list

you are saying:

if condition setsize ...

so "if" is expecting setsize to give it an instruction.list

In short, you forgot the brackets:

to yum
   if touchedturtle = "mouse [
     setsize 100
     wait 20
     announce [You got to the mousehole!]
   ]
end

that way, the instruction list that "if" receives is:

[
   setsize 100
   wait 20
   announce [You got to the mousehole!]
]



The following is wrong:

to ouch
if touchedturtle = ["t1 "t6 "t5 "t2 "t3 "t4]
[announce [You got eaten!]]
end

it should be:

to ouch
if member? touchedturtle [t1 t6 t5 t2 t3 t4]
[announce [You got eaten!]]
end

Because touchedturtle reports a word and the "equal sign" can't make sense of 
this:

word = list

Daniel
OpenWorld Learning