>I am a struggling beginner trying to hammer out a
>simple math tutor:
>
>To Quiz
>Make "num1 random 10
>Make "num2 random 10
>Make "answer :num1 + :num2
>pr :num1 pr :num2
>correct rl
>end
>
>To correct :response
>if equalp :response :Answer [pr [that's right!]]
[pr[wrong]]
>end
The problem is with RL (the full name is READLIST). It
reads what you type and reports it as a "list".
:NUM1, :NUM2, and :ANSWER are numbers, which are
"words" in Logo.
Let's say that :NUM1 comes up 3 and :NUM2 comes up 4.
Then :Answer is 7. You type 7, but in CORRECT, Logo
checks if 7 is equal to [7]. It's not.
If your version of Logo has READWORD, use it instead
of READLIST or RL. If not, you can write a READWORD
that will work in this case:
TO READWORD
OUTPUT FIRST READLIST
END
By the way, in most current versions of Logo EAQUALP
is EQUAL?. Or you can us = like this:
IF :RESPONSE = :ANSWER etc.
----------------------------------------------
Michael Tempel phone: 212 765 4918
Logo Foundation fax: 212 765 4789
250 West 57th Street
New York NY 10107-2228
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