/* -*- Mode: C++; c-basic-offset:4 ; -*- */

/*  

 *  (C) 2001 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 *

 */

/* style: c++ header */

/*

 * Simple test program for C++ binding

 */

/* #include <stdio.h> */

#include "mpi.h"

#include "mpitestconf.h"

#include "mpitestcxx.h"

#ifdef HAVE_IOSTREAM

// Not all C++ compilers have iostream instead of iostream.h

#include <iostream>

#ifdef HAVE_NAMESPACE_STD

// Those that do often need the std namespace; otherwise, a bare "cout"

// is likely to fail to compile

using namespace std;

#endif

#else

#include <iostream.h>

#endif

int main( int argc, char *argv[] )

{

    int rank, size, errs = 0;

    MTest_Init();

    rank = MPI::COMM_WORLD.Get_rank();

    size = MPI::COMM_WORLD.Get_size();

    if (size < 2) {

	cerr << "Size of comm_world must be at least 2\n";

	MPI::COMM_WORLD.Abort(1);

    }

    if (rank == 0) {

	int *buf = new int[100];

	int i;

	for (i=0; i<100; i++) buf[i] = i;

	MPI::COMM_WORLD.Send( buf, 100, MPI::INT, size-1, 0 );

    delete[] buf;

    }

    else if (rank == size - 1) {

	int *buf = new int[100];

	int i;

	MPI::COMM_WORLD.Recv( buf, 100, MPI::INT, 0, 0 );

	for (i=0; i<100; i++) {

	    if (buf[i] != i) {

		errs++;

		cerr << "Error: buf[" << i << "] = " << buf[i] << "\n";

	    }

	}

    delete[] buf;

    }

    MTest_Finalize( errs );

    MPI::Finalize();

    return 0;

}