/*
 * Copyright (C) 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);
    return 0;
}
