1 /* 2 * Copyright (c) 1980 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)rnd_pos.c 5.4 (Berkeley) 06/01/90"; 10 #endif /* not lint */ 11 12 # include "robots.h" 13 14 # define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x) 15 16 /* 17 * rnd_pos: 18 * Pick a random, unoccupied position 19 */ 20 COORD * 21 rnd_pos() 22 { 23 static COORD pos; 24 static int call = 0; 25 register int i = 0; 26 27 do { 28 pos.y = rnd(Y_FIELDSIZE - 1) + 1; 29 pos.x = rnd(X_FIELDSIZE - 1) + 1; 30 refresh(); 31 } while (Field[pos.y][pos.x] != 0); 32 call++; 33 return &pos; 34 } 35 36 rnd(range) 37 int range; 38 { 39 unsigned int rand(); 40 41 return rand() % range; 42 } 43