1 ;; The first three lines of this file were inserted by DrScheme. They record metadata
2 ;; about the language level of this file in a form that our tools can easily process.
3 #reader(lib "htdp-intermediate-reader.ss" "lang")((modname 19.1.5) (read-case-sensitive #t) (teachpacks ((lib "draw.ss" "teachpack" "htdp"))) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ((lib "draw.ss" "teachpack" "htdp")))))
4 ;; mini : nelon  ->  number
5 ;; to determine the smallest number
6 ;; on alon
7 (define (mini alon)
8   (cond
9     [(empty? (rest alon)) (first alon)]
10     [else (cond
11 	    [(< (first alon) 
12 		(mini (rest alon)))
13 	     (first alon)]
14 	    [else
15 	     (mini (rest alon))])]))
16      	
17 ;; maxi : nelon  ->  number
18 ;; to determine the largest number
19 ;; on alon
20 (define (maxi alon)
21   (cond
22     [(empty? (rest alon)) (first alon)]
23     [else (cond
24 	    [(> (first alon)
25 		(maxi (rest alon)))
26 	     (first alon)]
27 	    [else
28 	     (maxi (rest alon))])]))