usr/src/games/trek/getcodi.c

/*
 * Copyright (c) 1980 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)getcodi.c   5.3 (Berkeley) %G%";
#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);
}