srand48() -- Random-Number Function (libc)

Seed the 48-bit pseudo-random number routines
void srand48(seedval)
long seedval;

Computation of  48-bit pseudo-random numbers  uses two 48-bit  integers and
one 16-bit integer.  One of the 48-bit values holds the ``seed'' value from
which the  48-bit pseudo-random  value is computed.   This seed can  be set
explicitly, or is  the previously computed pseudo-random number.  The other
48-bit integer holds the  multiplier from which the pseudo-random number is
computed; and the 16-bit integer gives holds the addend.

Function srand48()  builds the 48-bit  ``seed'' value from  a long integer.
The 32 bits of the long  integer comprise the high 32 bits of the seed; the
low 16 bits are filled with the value 0x33E.

Functions lcong48() and seed48() can also be used to seed the routines that
generate 48-bit pseudo-random numbers.  srand48() returns nothing.

See Also

drand48(),
erand48(),
jrand48(),
libc,
lcong48(),
lrand48(),
mrand48(),
nrand48(),
seed48()

© 2012 by Stephen A. Ness