trek/getcodi.c

# 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;
float   *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);
}