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: (1) source distributions retain this entire copyright notice and
 * comment, and (2) distributions including binaries display the following
 * acknowledgement:  ``This product includes software developed by the
 * University of California, Berkeley and its contributors'' in the
 * documentation or other materials provided with the distribution and in
 * all advertising materials mentioning features or use of this software.
 * Neither the name of the University nor the names of its contributors may
 * 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
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)getcodi.c   5.4 (Berkeley) 6/1/90";
#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);
}