/*  probc.h  01 May 1999  */

# define PI 3.14159265358979323846264338327950288419716939937510

int    i_factorial ( int n );
float  ivec_mean ( int n, int x[] );
float  ivec_variance ( int n, int x[] );
float  normal_01_sample ( int *iseed );
float  poisson_cdf ( int k, float a );
float  poisson_mean ( float a );
float  poisson_pdf ( int k, float a );
int    poisson_sample ( float a, int *iseed );
float  poisson_variance ( float a );
float  r_factorial ( int n );
float  rvec_mean ( int n, float x[] );
float  rvec_variance ( int n, float x[] );
float  uniform_01_sample ( int *iseed );