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

#include "arg.h"

char *argv0;

static void
usage(int status)
{
	fprintf(stderr,
	        "Usage: %s [options]\n"
	        "  -h: show this help text\n"
	        "  -n number: some numeric argument\n"
	        "  -s string: some string argument\n"
	        "  -v: be verbose\n",
	        argv0);

	exit(status);
}

int
main(int argc, char **argv)
{
	int vflag = 0;
	int number = 0;
	char *str = "default-value";

	ARGBEGIN
	{
	case 'h':
		usage(0);
		break;
	case 'n':
		number = atoi(EARGF(usage(2)));
		break;
	case 's':
		str = EARGF(usage(2));
		break;
	case 'v':
		vflag++;
		break;
	default:
		usage(2);
	}
	ARGEND

	printf("verbosity level is %d\n", vflag);
	printf("numeric argument is %d\n", number);
	printf("string argument is %s\n", str);

	puts("positional arguments:");
	for (char **p = argv; *p; p++) {
		puts(*p);
	}
}