t8_step0_helloworld.cxx

/*
  This file is part of t8code.
  t8code is a C library to manage a collection (a forest) of multiple
  connected adaptive space-trees of general element types in parallel.

  Copyright (C) 2015 the developers

  t8code is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  t8code is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with t8code; if not, write to the Free Software Foundation, Inc.,
  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

/* See also: https://github.com/DLR-AMR/t8code/wiki/Step-0---Hello-World
 *
 * In this example we initialize t8code and print a small welcome message.
 * This is the t8code equivalent of HelloWorld. */

#include <t8.h> /* General t8code header, always include this. */

int
main (int argc, char **argv)
{
  int mpiret;

  /* Initialize MPI. This has to happen before we initialize sc or t8code. */
  mpiret = sc_MPI_Init (&argc, &argv);
  /* Error check the MPI return value. */
  SC_CHECK_MPI (mpiret);

  /* Initialize the sc library, has to happen before we initialize t8code. */
  sc_init (sc_MPI_COMM_WORLD, 1, 1, NULL, SC_LP_ESSENTIAL);
  /* Initialize t8code with log level SC_LP_PRODUCTION. See sc.h for more info on the log levels. */
  t8_init (SC_LP_PRODUCTION);

  /* Print a message on the root process. */
  t8_global_productionf (" [step0] \n");
  t8_global_productionf (" [step0] Hello, this is t8code :)\n");
  t8_global_productionf (" [step0] \n");

  sc_finalize ();

  mpiret = sc_MPI_Finalize ();
  SC_CHECK_MPI (mpiret);

  return 0;
}