1 // Copyright (C) 2006 Douglas Gregor <doug.gregor@gmail.com>
2
3 // Use, modification and distribution is subject to the Boost Software
4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5 // http://www.boost.org/LICENSE_1_0.txt)
6
7 // A simple Hello, world! example using Boost.MPI message passing.
8
9 #include <boost/mpi.hpp>
10 #include <iostream>
11 #include <boost/serialization/string.hpp> // Needed to send/receive strings!
12 namespace mpi = boost::mpi;
13
main(int argc,char * argv[])14 int main(int argc, char* argv[])
15 {
16 mpi::environment env(argc, argv);
17 mpi::communicator world;
18
19 if (world.rank() == 0) {
20 world.send(1, 0, std::string("Hello"));
21 std::string msg;
22 world.recv(1, 1, msg);
23 std::cout << msg << "!" << std::endl;
24 } else {
25 std::string msg;
26 world.recv(0, 0, msg);
27 std::cout << msg << ", ";
28 std::cout.flush();
29 world.send(0, 1, std::string("world"));
30 }
31
32 return 0;
33 }
34