On 10 March 2014 20:04, Daniel Carrera <dcarr...@gmail.com> wrote: > I am trying to write an R7RS-compliant version. R7RS would give me > "import", as well as char->integer and integer->char. The problem I'm > having is that my code does not work when I compile it, or when I use "csi > -s", but it works perfectly well when I paste it directly into the csi REPL. >
After a tip from Erik, I have isolated the issue. The (import) only works correctly if you first run (use posix). My REPL was loading posix because I loaded readline. The following code compiles and runs correctly: (use posix) ; ; Unicode-safe. Requires an R7RS-compliant Scheme. ; (import (srfi 13)) ; String library. (define msg "The quick brown fox jumps over the lazy fox.") (define key 13) (define (caesar char) (define A (char->integer #\A)) (define Z (char->integer #\Z)) (define a (char->integer #\a)) (define z (char->integer #\z)) (define c (char->integer char)) (cond ((and (>= c A) (<= c Z)) (integer->char (+ A (modulo (+ key (- c A)) 26)))) ((and (>= c a) (<= c z)) (integer->char (+ a (modulo (+ key (- c a)) 26)))) (else char))) ; Return other characters verbatim. (print (string-map caesar msg)) Cheers, Daniel.
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