Description

   The srand function uses the argument as a seed for a new sequence
   of pseudorandom numbers to be returned by subsequent calls to
   rand.

   If srand is then called with the same seed value, the sequence of
   pseudorandom numbers is repeated.

   If rand is called before any calls to srand, the same sequence of
   pseudorandom numbers is generated as when srand is first called
   with a seed value of 1.