projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 7d1a081c KM |
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 | } |