File: demo1.cpp

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// https://www.boost.org/doc/libs/1_67_0/doc/html/mpi/tutorial.html
#include <boost/mpi/environment.hpp>
#include <boost/mpi/communicator.hpp>
#include <iostream>
namespace mpi = boost::mpi;

int main()
{
    mpi::environment env;
    mpi::communicator world;
    std::cout << "I am process " << world.rank() << " of " << world.size()
              << "." << std::endl;
    return 0;
}