| 1 | /* |
| 2 | * Copyright (c) 1980 Regents of the University of California. |
| 3 | * All rights reserved. The Berkeley software License Agreement |
| 4 | * specifies the terms and conditions for redistribution. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)rnd_pos.c 5.1 (Berkeley) %G%"; |
| 9 | #endif not lint |
| 10 | |
| 11 | # include "robots.h" |
| 12 | |
| 13 | # define IS_SAME(p,y,x) ((p).y != -1 && (p).y == y && (p).x == x) |
| 14 | |
| 15 | /* |
| 16 | * rnd_pos: |
| 17 | * Pick a random, unoccupied position |
| 18 | */ |
| 19 | COORD * |
| 20 | rnd_pos() |
| 21 | { |
| 22 | static COORD pos; |
| 23 | static int call = 0; |
| 24 | register int i = 0; |
| 25 | |
| 26 | do { |
| 27 | pos.y = rnd(Y_FIELDSIZE - 1) + 1; |
| 28 | pos.x = rnd(X_FIELDSIZE - 1) + 1; |
| 29 | refresh(); |
| 30 | } while (Field[pos.y][pos.x] != 0); |
| 31 | call++; |
| 32 | return &pos; |
| 33 | } |
| 34 | |
| 35 | rnd(range) |
| 36 | int range; |
| 37 | { |
| 38 | unsigned int rand(); |
| 39 | |
| 40 | return rand() % range; |
| 41 | } |