10 lines
360 B
Racket
10 lines
360 B
Racket
#lang racket
|
|
(define (show-stem+leaf data)
|
|
(define xs (sort data <))
|
|
(for ([stem (add1 (floor (/ (last xs) 10)))])
|
|
(printf "~a|" (~a #:width 2 #:align 'right stem))
|
|
(for ([i xs])
|
|
(define-values [q r] (quotient/remainder i 10))
|
|
(when (= q stem) (printf " ~a" r)))
|
|
(newline)))
|
|
(show-stem+leaf (sequence->list (in-producer read eof)))
|