When referring to file paths in Common LISP, it's best to either use the pathname directive:
(load #p("/path/to/file")
-or-
...better yet, just use the arbitrary pathname tricks in Common LISP:
...

From the way I was tought things, function programming is synonymous with procedural programming.

As for the "complexities" of operator overloading and pre-processor commands, I consider those...

@ TylerSBrenton: If (s)he asked, you should at least have the common curtosey to provide an answer that isn't a google result.

@ sosina abraha:
There are two branches of programming: functional,...

And which programming language?

Watch out with variable names...especially in this situation: CAR is a function in Lisp, so I would name the variable *cars* instead.

It's also not working, because you haven't defined the symbols...