/* nag_rand_compd_poisson (g05tkc) Example Program.
 *
 * Copyright 2008, Numerical Algorithms Group.
 *
 * Mark 9, 2009.
 */
/* Pre-processor includes */
#include <stdio.h>
#include <math.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagg05.h>

int main(void)
{
  /* Integer scalar and array declarations */
  Integer     exit_status = 0;
  Integer     i, j, lstate;
  Integer     *state = 0, *x = 0;

  /* NAG structures */
  NagError    fail;

  /* Set the distribution parameters */
  Integer     m = 5;
  double      lambda[] = { 0.5e0, 5.0e0, 10.0e0, 500.0e0, 1000.0e0 };

  /* Set the sample size */
  Integer     n = 10;

  /* Choose the base generator */
  Nag_BaseRNG genid = Nag_Basic;
  Integer     subid = 0;

  /* Set the seed */
  Integer     seed[] = { 1762543 };
  Integer     lseed = 1;

  /* Initialise the error structure */
  INIT_FAIL(fail);

  printf(
          "nag_rand_compd_poisson (g05tkc) Example Program Results\n\n");

  /* Get the length of the state array */
  lstate = -1;
  nag_rand_init_repeatable(genid, subid, seed, lseed, state, &lstate, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_rand_init_repeatable (g05kfc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  /* Allocate arrays */
  if (!(state = NAG_ALLOC(lstate, Integer)) ||
      !(x = NAG_ALLOC(m, Integer)))
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  /* Initialise the generator to a repeatable sequence */
  nag_rand_init_repeatable(genid, subid, seed, lseed, state, &lstate, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_rand_init_repeatable (g05kfc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }

  /* Generate and display n sets of the m variates*/
  for (i = 0; i < n; i++)
    {
      /* Generate the variates */
      nag_rand_compd_poisson(m, lambda, state, x, &fail);
      if (fail.code != NE_NOERROR)
        {
          printf("Error from nag_rand_compd_poisson (g05tkc).\n%s\n",
                  fail.message);
          exit_status = 1;
          goto END;
        }

      /* Display the variates*/
      printf("%12ld", i+1);
      for (j = 0; j < m; j++)
        printf("%12ld", x[j]);
      printf("\n");
    }

 END:
  if (state) NAG_FREE(state);
  if (x) NAG_FREE(x);

  return exit_status;
}