start.cpp

#include "base.hpp"
#include "fluid_solver.hpp"
#include <iostream>
#include <fftw3-mpi.h>

int myrank, nprocs;

int main(int argc, char *argv[])
{
    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
    MPI_Comm_size(MPI_COMM_WORLD, &nprocs);