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1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
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3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
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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. | |
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16 | */ |
17 | ||
db247e8f | 18 | #ifndef lint |
d99e6414 | 19 | static char sccsid[] = "@(#)ranf.c 5.3 (Berkeley) %G%"; |
e9fb6bea | 20 | #endif /* not lint */ |
db247e8f | 21 | |
06d69904 KL |
22 | # include <stdio.h> |
23 | ||
db247e8f KM |
24 | ranf(max) |
25 | int max; | |
26 | { | |
27 | register int t; | |
28 | ||
29 | if (max <= 0) | |
30 | return (0); | |
31 | t = rand() >> 5; | |
32 | return (t % max); | |
33 | } | |
34 | ||
35 | ||
36 | double franf() | |
37 | { | |
38 | double t; | |
39 | t = rand() & 077777; | |
40 | return (t / 32767.0); | |
41 | } |