Generate a pseudo-random double in a thread-safe manner
#include <stdlib.h> double erand48( unsigned short int xsubi );
- An array that comprises the 48 bits of the initial value that you want to use.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The erand48() function uses a linear congruential algorithm and 48-bit integer arithmetic to generate a nonnegative double uniformly distributed over the interval [0.0, 1.0]. It's a thread-safe version of drand48() .
The xsubi array should contain the desired initial value; this makes erand48() thread-safe, and lets you start a sequence of random numbers at any known value.
A pseudo-random double.