// An example parallel program using MPI
 
 
#include <iostream>
#include <sstream>
 
#include "mpi.h"
 
int main(int argc, char *argv[]) {
  // Initialize MPI
  MPI_Init(&argc, &argv);
 
  // Get the total number of tasks
  int num_tasks;
  MPI_Comm_size(MPI_COMM_WORLD, &num_tasks);
 
  // Get the task ID
  int task_id;
  MPI_Comm_rank(MPI_COMM_WORLD, &task_id);
 
  // Set up the string and print
  std::stringstream ss;
  ss << "Printing from task " << task_id << '/' << num_tasks << '\n';
  std::cout << ss.str();
 
  // Finish our MPI work
  MPI_Finalize();
  return 0;
}
 

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