86 lines
3.2 KiB
Scheme
86 lines
3.2 KiB
Scheme
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;; Copyright (c) 2014 Nikolay Puzanov <punzik@gmail.com>
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;; Permission is hereby granted, free of charge, to any person obtaining a copy
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;; of this software and associated documentation files (the "Software"), to deal
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;; in the Software without restriction, including without limitation the rights
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;; to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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;; copies of the Software, and to permit persons to whom the Software is
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;; furnished to do so, subject to the following conditions:
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;; The above copyright notice and this permission notice shall be included in
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;; all copies or substantial portions of the Software.
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;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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;; AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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;; OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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;; THE SOFTWARE.
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#lang racket
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(require rnrs/io/ports-6) ;; Racket
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;; Helper
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(define (answer . params)
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(for-each (lambda (x) (display x)) params)
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(flush-output-port (current-output-port))
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(get-line (current-input-port)))
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(define (yes? . params)
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(let ((ans (apply answer (append params '("? ")))))
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(if (= (string-length ans) 0)
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#f
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(or
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(char-ci=? (string-ref ans 0) #\y)
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(char-ci=? (string-ref ans 0) #\д)))))
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;; Copy tree
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(define (copy-pet-tree pet-tree)
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(if (null? pet-tree)
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'()
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(list (car pet-tree)
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(cadr pet-tree)
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(copy-pet-tree (caddr pet-tree))
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(copy-pet-tree (cadddr pet-tree)))))
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;; Main function
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(define (game-round pet-tree top-pet-name)
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(let walk-pet-tree ((pet-tree pet-tree)
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(y-pet (list top-pet-name)))
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(if (null? pet-tree)
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(if (yes? "Это " (car y-pet))
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(begin
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(display "Ура, я угадал!")
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(newline)
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'())
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(let* ((name (answer "Сдаюсь! Кто это? "))
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(feature (answer "Чем " name " отличается от " (car y-pet) "? ")))
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(list name feature '() '()))) ;; return new pet
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(append
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(list (car pet-tree)
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(cadr pet-tree))
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(if (yes? (cadr pet-tree))
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(list (walk-pet-tree (caddr pet-tree) pet-tree)
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(copy-pet-tree (cadddr pet-tree)))
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(list (copy-pet-tree (caddr pet-tree))
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(walk-pet-tree (cadddr pet-tree) y-pet)))))))
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(define TREE-FILE-NAME "data.sexp")
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;; Main LOOP
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(let loop ((pet-tree
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(if (file-exists? TREE-FILE-NAME)
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(call-with-input-file TREE-FILE-NAME read)
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'())))
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(let ((tree (game-round pet-tree "Кот")))
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(newline)
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(if (yes? "Играем еще")
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(loop tree)
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(begin
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;; Racket
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(if (file-exists? TREE-FILE-NAME) (delete-file TREE-FILE-NAME) #f)
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(call-with-output-file TREE-FILE-NAME (lambda (p) (write tree p)))
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))))
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