#include <stdio.h>
#include <errno.h>
#include <stdlib.h>

#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif

main(argc,argv) 
int	argc;
char	*argv[];
{
	if (argc != 2) {
		fprintf(stderr,"Usage: %s error_number\n",argv[0]);
		exit(EXIT_FAILURE);
	}

	errno = 0;
	errno = atoi(argv[1]);
	if(errno < 0) {
		fprintf(stderr,"%s error code (%s) unknown\n",argv[0],argv[1]);
		exit(EXIT_FAILURE);
	}
	perror(argv[1]);
	exit (errno /*EXIT_SUCCESS*/);
}