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// https://www.boost.org/doc/libs/1_67_0/doc/html/mpi/tutorial.html
#include <boost/mpi.hpp>
#include <boost/mpi/collectives.hpp>
#include <iostream>
#include <cstdlib>
#include <vector>
namespace mpi = boost::mpi;
int main(int argc, char *argv[])
{
mpi::environment env(argc, argv);
mpi::communicator world;
std::srand(time(0) + world.rank());
std::vector<int> all;
int mine = -1;
if (world.rank() == 0)
{
all.resize(world.size());
std::generate(all.begin(), all.end(), std::rand);
}
mpi::scatter(world, all, mine, 0);
for (int r = 0; r < world.size(); ++r)
{
world.barrier();
if (r == world.rank())
{
std::cout << "Rank " << r << " got " << mine << '\n';
}
}
return 0;
}
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