/* nag_rngs_gen_discrete (g05mzc) Example Program.
 *
 * Copyright 2001 Numerical Algorithms Group.
 *
 * Mark 7, 2001.
 */

#include <stdio.h>
#include <nag.h>
#include <nag_stdlib.h>
#include <nagg05.h>

int main(void)
{
  /* Initialized data */

  static double   p[] = { 0.01, 0.02, 0.04, 0.08, 0.2, 0.3, 0.2, 0.08, 0.04,
                          0.02, 0.01 };

  /* Scalars */
  Integer         i, igen, ip1, np, n, nr;
  Integer         exit_status = 0;
  NagError        fail;
  Nag_ComputeType itype;

  /* Arrays */
  double          *r = 0;
  Integer         *x = 0;
  Integer         iseed[4];

  INIT_FAIL(fail);

  printf("nag_rngs_gen_discrete (g05mzc) Example Program Results\n\n");
  nr = 60;
  n = 20;
  np = 11;

  /* Allocate memory */
  if (!(r = NAG_ALLOC(nr, double)) ||
      !(x = NAG_ALLOC(n, Integer)))
    {
      printf("Allocation failure\n");
      exit_status = -1;
      goto END;
    }

  /* Set the distribution parameters P and M */
  ip1 = -5;
  itype = Nag_Compute_1;
  /* Initialise the seed to a repeatable sequence */
  iseed[0] = 1762543;
  iseed[1] = 9324783;
  iseed[2] = 42344;
  iseed[3] = 742355;
  /* igen identifies the stream. */
  igen = 1;
  /* nag_rngs_init_repeatable (g05kbc).
   * Initialize seeds of a given generator for random number
   * generating functions (that pass seeds explicitly) to give
   * a repeatable sequence
   */
  nag_rngs_init_repeatable(&igen, iseed);

  /* Choose MODE = 2 */
  /* nag_rngs_gen_discrete (g05mzc).
   * Generates a vector of random integers from a general
   * discrete distribution, seeds and generator number passed
   * explicitly
   */
  nag_rngs_gen_discrete(2, p, np, ip1, itype, n, x, igen, iseed, r, &fail);
  if (fail.code != NE_NOERROR)
    {
      printf("Error from nag_rngs_gen_discrete (g05mzc).\n%s\n",
              fail.message);
      exit_status = 1;
      goto END;
    }
  for (i = 0; i < n; ++i)
    {
      printf("%12ld\n", x[i]);
    }
 END:
  if (r) NAG_FREE(r);
  if (x) NAG_FREE(x);
  return exit_status;
}