getcodi.c

来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· C语言 代码 · 共 36 行

#ifndef lint
static char sccsid[] = "@(#)getcodi.c	4.2	(Berkeley)	5/27/83";
#endif not lint

# include	"getpar.h"

/*
**  get course and distance
**
**	The user is asked for a course and distance.  This is used by
**	move, impulse, and some of the computer functions.
**
**	The return value is zero for success, one for an invalid input
**	(meaning to drop the request).
*/

getcodi(co, di)
int	*co;
double	*di;
{

	*co = getintpar("Course");

	/* course must be in the interval [0, 360] */
	if (*co < 0 || *co > 360)
		return (1);
	*di = getfltpar("Distance");

	/* distance must be in the interval [0, 15] */
	if (*di <= 0.0 || *di > 15.0)
		return (1);

	/* good return */
	return (0);
}