#lang racket

;;; code examples for functions with a variable number of arguments

;;; functions with a variable number of arguments
(define (squid a b . c)
  (display a) (newline)
  (display b) (newline)
  (display c) (newline))

(define (average . lst)
  (if (null? lst)
      (error "can't take the average of an empty list")
      (/ (apply + lst) (length lst))))