Fcalva/chibi-scheme
1
0
Fork 0
mirror of https://github.com/ashinn/chibi-scheme.git synced 2025-05-19 05:39:18 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Handling ratios, inexact and complex in number->string.

Browse source 
Fixes issue #317.
This commit is contained in:
Alex Shinn 2016-03-19 15:12:09 +09:00
parent fec1016254
commit 57dd5464c5
1 changed files with 21 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

27
lib/init-7.scm
View file

@ -394,12 +394,27 @@
((if (null? o) #t (eq? 10 (car o)))
(%number->string num))
(else
(let lp ((n (abs num)) (d (car o)) (res '()))
(if (> n 0)
(lp (quotient n d) d (cons (digit-char (remainder n d)) res))
(if (null? res)
"0"
(list->string (if (negative? num) (cons #\- res) res))))))))
(let ((d (car o)))
(cond
((%complex? num)
(let ((real (real-part num))
(imag (imag-part num)))
(string-append (number->string real d) (if (negative? imag) "-" "+")
(number->string imag d) "i")))
((inexact? num)
(string-append "#i" (number->string (inexact->exact num) d)))
((ratio? num)
(string-append (number->string (numerator num) d) "/"
(number->string (denominator num) d)))
(else
(let lp ((n (abs num)) (res '()))
(cond
((> n 0)
(lp (quotient n d) (cons (digit-char (remainder n d)) res)))
((null? res)
"0")
(else
(list->string (if (negative? num) (cons #\- res) res)))))))))))
(define (list->string ls)
(call-with-output-string