/* vis:  make funny characters visible (version 2) */

#include <stdio.h>
#include <ctype.h>

main(argc, argv)
	int argc;
	char *argv[];
{
	int c, strip = 0;

	if (argc > 1 && strcmp(argv[1], "-s") == 0)
		strip = 1;
	while ((c = getchar()) != EOF)
		if (isascii(c) &&
		    (isprint(c) || c=='\n' || c=='\t' || c==' '))
			putchar(c);
		else if (!strip)
			printf("\\%03o", c);
	exit(0);
}