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//                      Didasko Tutorial Package
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// Define serial dense vectors
// This code should be run with at least two processes

#include "Didasko_ConfigDefs.h"
#if defined(HAVE_DIDASKO_EPETRA)

#include "Epetra_ConfigDefs.h"
#ifdef HAVE_MPI
#include "mpi.h"
#include "Epetra_MpiComm.h"
#else
#include "Epetra_SerialComm.h"
#endif
#include "Epetra_Map.h"
#include "Epetra_SerialDenseVector.h"

int main(int argc, char *argv[])
{
  
#ifdef HAVE_MPI
  MPI_Init(&argc, &argv);
  Epetra_MpiComm Comm(MPI_COMM_WORLD);
#else
  Epetra_SerialComm Comm;
#endif

  // Total number of elements in vectors
  int NumRows = 5;

  Epetra_SerialDenseVector x;

  // shape this object
  x.Size( NumRows );

  // set the elements of the vector
  for( int i=0 ; i<NumRows ; ++i )  x[i] = 1.0*i;
  // NOTE: x[i] performs the same operations of x(i); 
  // however, the former checks for the bounds, while the latter
  // do such only if Epetra is compiled with -DEPETRA_ARRAY_BOUNDS_CHECK


  // now try to write out of memory
  //int Length = x.Length();
  
  //x[Length] = 12;
  
  cout << x;

#ifdef HAVE_MPI
  MPI_Finalize();
#endif

  return(0);

} /* main */

#else

#include <stdlib.h>
#include <stdio.h>

int main(int argc, char *argv[])
{
  puts("Please configure Didasko with:\n"
       "--enable-epetra");

  return 0;
}

#endif
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