Hello MPI

hello.cpp

#include <mpi.h>
#include <iostream>

int main(int argc, char *argv[])
{
  int rank, size;
  MPI::Init(argc, argv);
  rank = MPI::COMM_WORLD.Get_rank();
  size = MPI::COMM_WORLD.Get_size();
  std::cout<< "Hello from process "<< rank <<" of "<< size <<"\n";
  MPI::Finalize();
  return 0;
}