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September Morn Update

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Ingy döt Net 2019-09-12 10:33:56 -07:00
parent 4e2d22a71d
commit aac6731f2c
6856 changed files with 141342 additions and 21127 deletions
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5
Task/Arithmetic-evaluation/Racket/arithmetic-evaluation.rkt
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@ -1,6 +1,7 @@
#lang racket
(require parser-tools/yacc parser-tools/lex
(require parser-tools/yacc
parser-tools/lex
(prefix-in ~ parser-tools/lex-sre))
(define-tokens value-tokens (NUM))
@ -30,6 +31,6 @@
(define (calc str)
(define i (open-input-string str))
(displayln (parse (λ() (lex i)))))
(displayln (parse (λ () (lex i)))))
(calc "(1 + 2 * 3) - (1+2)*-3")