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+// Copyright (C) 2006 Douglas Gregor <doug.gregor@gmail.com>
+
+// Use, modification and distribution is subject to the Boost Software
+// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+// An example using Boost.MPI's reduce() to compute a minimum value.
+#include <boost/mpi.hpp>
+#include <iostream>
+#include <cstdlib>
+namespace mpi = boost::mpi;
+
+int main(int argc, char* argv[])
+{
+ mpi::environment env(argc, argv);
+ mpi::communicator world;
+
+ std::srand(time(0) + world.rank());
+ int my_number = std::rand();
+
+ if (world.rank() == 0) {
+ int minimum;
+ reduce(world, my_number, minimum, mpi::minimum<int>(), 0);
+ std::cout << "The minimum value is " << minimum << std::endl;
+ } else {
+ reduce(world, my_number, mpi::minimum<int>(), 0);
+ }
+
+ return 0;
+}