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My TAs and professors will prolly respond after everyone else...


:o :bounce: :king: :rotfl: :king: :bounce: :o

Problem with defun:

(setq x (make-array '(5) :initial-element 0))

Creates an array x of size 5.

(defun dim1 (x a) (setq x (make-array '(5) :initial-element 0)))
(setq anynumber 0)
(dim1 teststring anynumber)

Also creates an array x of size 5.

(defun dim1 (x a) (setq x (make-array '(a) :initial-element 0)))
(dim1 teststring 7)

Doesn't work. Says teststring is unbound. Aaaargh!!! Any ideas? Removing quote doesn't do anything..

You need to define the function as follows


To use it, you have to use ' with the array variable you want to create. ' makes the expression not to be evaluated. You are getting the unbound error 'cause lisp tries to evaluate a symbol which hasn't been created. The correct call is:


Will create an array of 7 elements. (I've tested this in XLisp).

THANKS A LOT MAN!!! You're great! I still didn't get the reply from my TEACHERS; maybe I should give you my tuition $ instead? :roll:


Oh one more thing:

Instead of doing:

(defun dim1 (x a) (make-array a :initial-element 0))
(setq string1 ('string1 5)

How can I just make it do (dim1 string1 5)?? It doesn't seem to recognize setq as a permament operation inside scopes.

I don't quite understand your question. I'll make a guess. To dim an array directly, just...


You don't need to have a program or define a function: you can enter the above line directly, and it will create the X variable with 5 empty (NIL) indexes.

I want to be able to dim an array by just using

(dim1 (name) (length))

(and dim2 -- 2 dimensions, and dim3 -- 3 dimensions)

current code forces me to do:


(and I also wanted to have them default at 0)

Use defvar instead of setq. This makes a global variable:


Now you can use this:


Now type X and see what happens

what is lisp? a programming language? what do you use it for?

I have that same question

Quote: what is lisp? a programming language? what do you use it for?

:rotfl: :rotfl: :rotfl: :rotfl:

Um... confusing other programmers!! :???: :???: :???: (LISP is difficult to learn.. I don't like it much)

Thanks again na_th_an.
But that only works for x.. how do I make it work for something else?

Lisp is the short of "List Processing". It is a functional language, so it is different from QB or C which are imperative languages.

In Lisp everything is a list, even program code. You can use the program code like data, for example. It is very beautiful as a language. Its main application is with AI and some automatic reasoning.

Agamemnus: I've been reading my documentation and testing and ... I DON'T KNOW Maybe it is some funny "funcall" action, but I can't quite remember how it was used. Please ask your teachers and post here the sollution. I'd like to know how, too . Maybe loosecaboose could help too...