rand(3C)                         DG/UX 5.4.2                        rand(3C)


NAME
       rand, srand - simple random-number generator

SYNOPSIS
       #include <stdlib.h>

       int rand (void);

       void srand (unsigned int seed);

DESCRIPTION
       rand uses a multiplicative congruential random-number generator with
       period 2^32 that returns successive pseudo-random numbers in the
       range from 0 to (2^15)-1.

       The function srand uses the argument seed as a seed for a new
       sequence of pseudo-random numbers to be returned by subsequent calls
       to the function rand.  If the function srand is then called with the
       same seed value, the sequence of pseudo-random numbers will be
       repeated.  If the function rand is called before any calls to srand
       have been made, the same sequence will be generated as when srand is
       first called with a seed value of 1.

NOTES
       The spectral properties of rand are limited.  drand48(3C) provides a
       much better, though more elaborate, random-number generator.

SEE ALSO
       drand48(3C).




























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