#include <stdio.h>
#include <mpi.h>
#include "nodes_used.h"

int main(int argc, char* argv[])
{
    int id, np, processor_name_len;
    char processor_name[MPI_MAX_PROCESSOR_NAME];

    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &id);
    MPI_Comm_size(MPI_COMM_WORLD, &np);
    MPI_Get_processor_name(processor_name, &processor_name_len);

    FILE* log_fp = NULL;
    if (id == 0)
    {
        log_fp = fopen("nodes_used.log", "w");
    }

    /* Log our MPI processes to the log file. We could also have
       specified the special FILE* names "stdout" or "stderr" here */
    log_processes(log_fp, id, np, processor_name);

    if (id == 0)
    {
        fclose(log_fp);
    }

    MPI_Finalize();
    return 0;
}