/* nag_rngs_2_way_table (g05qdc) 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)
{
  /* Scalars */
  Integer  i, igen, j, rctot;
  Integer  exit_status=0;
  Integer  nrow, ncol, nr;
  Integer  pdx;
  NagError fail;
  Nag_OrderType order;

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

#ifdef NAG_COLUMN_MAJOR
#define X(I,J) x[(J-1)*pdx + I - 1]
  order = Nag_ColMajor;
#else
#define X(I,J) x[(I-1)*pdx + J - 1]
  order = Nag_RowMajor;
#endif

  INIT_FAIL(fail);
  Vprintf("nag_rngs_2_way_table (g05qdc) Example Program Results\n\n");
  nrow = 4;
  ncol = 3;
  nr = 60;

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

#ifdef NAG_COLUMN_MAJOR
  pdx = nrow;
#else
  pdx = ncol;
#endif

  /* Set the table row and column totals */
  totr[0] = 9;
  totr[1] = 11;
  totr[2] = 7;
  totr[3] = 23;
  totc[0] = 16;
  totc[1] = 17;
  totc[2] = 17;
  rctot = 50;

  /* igen identifies the stream. */
  igen = 1;
  /* Initialise the seed to a repeatable sequence */
  iseed[0] = 1762543;
  iseed[1] = 9324783;
  iseed[2] = 42344;
  iseed[3] = 742355;

  /* 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_2_way_table (g05qdc).
   * Generates a random table matrix
   */
  nag_rngs_2_way_table(order, 2, nrow, ncol, totr, totc, x, pdx, igen, iseed,
                       r, nr, &fail);
  if (fail.code != NE_NOERROR)
    {
      Vprintf("Error from nag_rngs_2_way_table (g05qdc).\n%s\n", fail.message);
      exit_status = 1;
      goto END;
    }
  for (i = 1; i <= nrow; ++i)
    {
      Vprintf("%1s", "");
      for (j = 1; j <= ncol; ++j)
        {
          Vprintf("%4ld %s", X(i,j), j%3 == 0 ?" |":" ");
        }
      Vprintf("%5ld\n", totr[i - 1]);
    }

  Vprintf("    ---------------+-----\n");
  Vprintf("%1s", "");
  for (j = 1; j <= ncol; ++j)
    {
      Vprintf("%4ld %s", totc[j - 1], j%3 == 0 ?" |":" ");
    }
  Vprintf("%5ld\n", rctot);
 END:
  if (r) NAG_FREE(r);
  if (totc) NAG_FREE(totc);
  if (totr) NAG_FREE(totr);
  if (x) NAG_FREE(x);
  return exit_status;
}