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  1. #!/usr/bin/env racket
  2.  
  3. #lang racket
  4.  
  5. (require(only-in srfi/13 string-tokenize)
  6.         (only-in srfi/14 char-set-difference
  7.                  char-set:graphic
  8.                  char-set:punctuation))
  9.  
  10. (let ((n 3)
  11.       (row (string-tokenize
  12.             (begin (printf "a, b, cの入力 : ~%") (read-line))
  13.             (char-set-difference
  14.              char-set:graphic
  15.              char-set:punctuation))))
  16.   (when (= (length row) n)
  17.     (let ((row (append row row)))
  18.       (for-each (lambda (x)
  19.                   (apply printf "~a ~a ~a~%"
  20.                          (map (lambda (y)
  21.                                 (list-ref row (+ x y)))
  22.                               (range n))))
  23.                 (range n)))))
  24.  
Success #stdin #stdout 0.6s 75100KB
comments (?)
stdin 
1, 2, 3
stdout 
Standard output is empty
https://ideone.com/VFq6tb
language:
Racket (racket 7.0)
created:
1 year ago
visibility:
secret

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