1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 */ 17 18 #ifndef lint 19 static char sccsid[] = "@(#)rnd_pos.c 5.3 (Berkeley) 06/18/88"; 20 #endif /* not lint */ 21 22 # include "robots.h" 23 24 # define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x) 25 26 /* 27 * rnd_pos: 28 * Pick a random, unoccupied position 29 */ 30 COORD * 31 rnd_pos() 32 { 33 static COORD pos; 34 static int call = 0; 35 register int i = 0; 36 37 do { 38 pos.y = rnd(Y_FIELDSIZE - 1) + 1; 39 pos.x = rnd(X_FIELDSIZE - 1) + 1; 40 refresh(); 41 } while (Field[pos.y][pos.x] != 0); 42 call++; 43 return &pos; 44 } 45 46 rnd(range) 47 int range; 48 { 49 unsigned int rand(); 50 51 return rand() % range; 52 } 53