/prog/ - post you are run length encoding in lisp

Name: Anonymous 2014-10-05 3:18

critique mine pl0x:

(defun rle (str) ;run length encoding
  (let ((i 0) c count out)
    (while (< i (length str))
      (if (eq c (elt str i))
	  (setq count (1+ count))
	(when c
	  (setq out (append out (list (cons c count)))))
	(setq c (elt str i))
	(setq count 1))
      (setq i (1+ i)))
    (when c (setq out (append out (list (cons c count)))))
    out))

Name: Anonymous 2014-10-09 7:43

rle:

#include <stdio.h>

int main(int argc, char **argv) {
	int byte, count, temp;
begin:
	byte = getchar();
	count = 0;
	if (byte == EOF) return 0;
is_same:
	temp = getchar();
	if (temp == EOF) {
		putchar(count); putchar(byte);
		return 0;
	} else if (byte == temp) {
		count++;
		if (count == 255) {
			putchar(count); putchar(byte);
			goto begin;
		} else goto is_same;
	} else {
		putchar(count); putchar(byte);
		byte = temp; count = 0;
		goto is_same;
	}
}

unrle:

#include <stdio.h>

int main(int argc, char **argv) {
	int count, byte;
	for (;;) {
		count = getchar();
		byte = getchar();
		if (count == EOF || byte == EOF) return 0;
		for (int i = 0; i <= count; i++) putchar(byte);
	}
}

post you are run length encoding in lisp

1 Name: Anonymous 2014-10-05 3:18

50 Name: Anonymous 2014-10-09 7:43

Name: Anonymous 2014-10-05 3:18

Name: Anonymous 2014-10-09 7:43