rand(3) Library Functions Manual rand(3)
Name
rand, srand - random number generator
Syntax
#include <stdlib.h>
void srand(seed)
unsigned seed;
rand()
Description
The newer should be used in new applications. The subroutine remains for compatibility.
The subroutine 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 with 1 as argument. It can be set to a random starting point by calling with whatever you like
as argument.
Environment
For the System V environment, the subroutine returns numbers in the range from 0 to 215-1.
See Also
random(3)
rand(3)
