29 lines
1.2 KiB
Racket
29 lines
1.2 KiB
Racket
;; The first three lines of this file were inserted by DrScheme. They record metadata
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;; about the language level of this file in a form that our tools can easily process.
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#reader(lib "htdp-beginner-reader.ss" "lang")((modname master) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
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(require htdp/master)
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; (load "tester.ss")
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;; check-guess : color color color color -> symbol
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(define (check-guess target1 target2 guess1 guess2)
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(cond
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((and (eq? target1 guess1) (eq? target2 guess2))
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'perfect)
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((or (eq? target1 guess1) (eq? target2 guess2))
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'one_color-at_correct_position)
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((or (eq? target1 guess2) (eq? target2 guess1))
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'the_colors_occur)
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(else 'nothing_correct)))
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;; Tests:
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(eq? (check-guess 'white 'blue 'white 'blue) 'perfect)
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(eq? (check-guess 'white 'blue 'red 'blue) 'one_color-at_correct_position)
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(eq? (check-guess 'white 'blue 'blue 'red) 'the_colors_occur)
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(eq? (check-guess 'white 'blue 'red 'green) 'nothing_correct)
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(check-expect (master check-guess) true)
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; (check-error (master 1) "master: primitive operator master expects a defined procedure name (usually `compare-guess') in this position")
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; (check-error (master first) ...)
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