— bad random number
function computes a sequence of pseudo-random integers in the range of 0 to
RAND_MAX (as defined by the header file
function sets its argument as the seed for a new sequence of pseudo-random
numbers to be returned by
rand(). These sequences
are repeatable by calling
srand() with the same seed
If no seed value is provided, the functions are automatically seeded with a value of 1.
a thread-safe version of
rand(). Storage for the
seed must be provided through the seed argument, and
needs to have been initialized by the caller.
arc4random(3), rand48(3), random(3)
srand() functions conform to ANSI
X3.159-1989 (“ANSI C89”).
rand_r() function conforms to
IEEE Std 1003.1-2008 (“POSIX.1”).
srand() first appeared in
Version 3 AT&T UNIX.