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Jun 28th, 2017
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  1. (define (assoc_upper n liste)
  2. (let* (
  3. (n n)
  4. )
  5. (if (and (>= (char->integer n) 97) ( <= (char->integer n) 122) )
  6. (assoc (integer->char (- (char->integer n) 32)) liste)
  7. (assoc n liste)
  8. )
  9. )
  10. )
  11.  
  12. ; ===============================================================
  13.  
  14.  
  15. (define (char->uppercase n)
  16. (if (and (>= (char->integer n) 97) ( <= (char->integer n) 122) )
  17. (integer->char (- (char->integer n) 32))
  18. n
  19. )
  20. )
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