1 12687dd9 2023-08-04 jrmu ;; The first three lines of this file were inserted by DrScheme. They record metadata
 2 12687dd9 2023-08-04 jrmu ;; about the language level of this file in a form that our tools can easily process.
 3 12687dd9 2023-08-04 jrmu #reader(lib "htdp-beginner-reader.ss" "lang")((modname |37.4|) (read-case-sensitive #t) (teachpacks ((lib "convert.ss" "teachpack" "htdp") (lib "guess.ss" "teachpack" "htdp") (lib "master.ss" "teachpack" "htdp") (lib "draw.ss" "teachpack" "htdp") (lib "hangman.ss" "teachpack" "htdp"))) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ((lib "convert.ss" "teachpack" "htdp") (lib "guess.ss" "teachpack" "htdp") (lib "master.ss" "teachpack" "htdp") (lib "draw.ss" "teachpack" "htdp") (lib "hangman.ss" "teachpack" "htdp")))))
 4 12687dd9 2023-08-04 jrmu ;Data Definition
 5 12687dd9 2023-08-04 jrmu ;A list-of-digits is either
 6 12687dd9 2023-08-04 jrmu ;1. an empty list or
 7 12687dd9 2023-08-04 jrmu ;2. (cons n lod) where n is a number and lod is a list-of-digits.
 8 12687dd9 2023-08-04 jrmu ;
 9 12687dd9 2023-08-04 jrmu ;Contract, Purpose, Header
10 12687dd9 2023-08-04 jrmu ;convert : list-of-digits -> number
11 12687dd9 2023-08-04 jrmu ;Converts a-list to a number where the first digit in a-list is
12 12687dd9 2023-08-04 jrmu ;the least significant digit in the number output, the second
13 12687dd9 2023-08-04 jrmu ;digit the second least, and so forth.
14 12687dd9 2023-08-04 jrmu ;
15 12687dd9 2023-08-04 jrmu ;Template
16 12687dd9 2023-08-04 jrmu ;(define (convert a-list)
17 12687dd9 2023-08-04 jrmu ;  (cond
18 12687dd9 2023-08-04 jrmu ;    [(empty?) ...]
19 12687dd9 2023-08-04 jrmu ;    [(cons?) 
20 12687dd9 2023-08-04 jrmu ;     (cond
21 12687dd9 2023-08-04 jrmu ;       [(and
22 12687dd9 2023-08-04 jrmu ;         (number? (first a-list))
23 12687dd9 2023-08-04 jrmu ;         ())
24 12687dd9 2023-08-04 jrmu ;        ... (first a-list) (convert (rest a-list)) ...]
25 12687dd9 2023-08-04 jrmu ;       [(number? (first a-list)) ...]
26 12687dd9 2023-08-04 jrmu ;       [else (error '... "...")]
27 12687dd9 2023-08-04 jrmu ;    [else ...])]))
28 12687dd9 2023-08-04 jrmu 
29 12687dd9 2023-08-04 jrmu (define (convert a-list)
30 12687dd9 2023-08-04 jrmu   (cond
31 12687dd9 2023-08-04 jrmu     [(empty? a-list) 0]
32 12687dd9 2023-08-04 jrmu     [(cons? a-list) 
33 12687dd9 2023-08-04 jrmu      (cond
34 12687dd9 2023-08-04 jrmu        [(and
35 12687dd9 2023-08-04 jrmu          (number? (first a-list))
36 12687dd9 2023-08-04 jrmu          (>= (first a-list) 0)
37 12687dd9 2023-08-04 jrmu          (<= (first a-list) 9))
38 12687dd9 2023-08-04 jrmu         (+ (first a-list) (* 10 (convert (rest a-list))))]
39 12687dd9 2023-08-04 jrmu        [else (error 'convert "expected arg: list (of digits)")])]
40 12687dd9 2023-08-04 jrmu      [else (error 'convert "expected arg: list (of digits)")]))
41 12687dd9 2023-08-04 jrmu 
42 12687dd9 2023-08-04 jrmu ;Contract, Purpose, Header
43 12687dd9 2023-08-04 jrmu ;check-guess-for-list : list-of-digits number -> symbol
44 12687dd9 2023-08-04 jrmu ;Consumes a-list, which is a list-of-digits and converts it
45 12687dd9 2023-08-04 jrmu ;to a number according to the function convert.  It compares this
46 12687dd9 2023-08-04 jrmu ;to chosen, which is a number and returns the corresponding symbol
47 12687dd9 2023-08-04 jrmu ;'TooSmall, 'Perfect, or 'TooLarge
48 12687dd9 2023-08-04 jrmu ;
49 12687dd9 2023-08-04 jrmu ;Template
50 12687dd9 2023-08-04 jrmu 
51 12687dd9 2023-08-04 jrmu (define (check-guess-for-list a-list chosen)
52 12687dd9 2023-08-04 jrmu   (cond
53 12687dd9 2023-08-04 jrmu     [(= (convert a-list) chosen) 'Perfect]
54 12687dd9 2023-08-04 jrmu     [(> (convert a-list) chosen) 'TooLarge]
55 12687dd9 2023-08-04 jrmu     [(< (convert a-list) chosen) 'TooSmall]))