/* * 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[] = "@(#)rnd_pos.c 5.4 (Berkeley) 6/1/90"; #endif /* not lint */ # include "robots.h" # define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x) /* * rnd_pos: * Pick a random, unoccupied position */ COORD * rnd_pos() { static COORD pos; static int call = 0; register int i = 0; do { pos.y = rnd(Y_FIELDSIZE - 1) + 1; pos.x = rnd(X_FIELDSIZE - 1) + 1; refresh(); } while (Field[pos.y][pos.x] != 0); call++; return &pos; } rnd(range) int range; { unsigned int rand(); return rand() % range; }