RAND(3)

NAME
rand, srand - random number generator

SYNOPSIS
srand(seed)
int seed;

rand( )

DESCRIPTION
Rand uses a multiplicative congruential random number generator with period 232 to return successive pseudo-random numbers in the range from 0 to 231-1.

The generator is reinitialized by calling srand with 1 as argument. It can be set to a random starting point by calling srand with whatever you like as argument.