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Diffstat (limited to 'src/boost/libs/mpi/example/random_min.cpp')
-rw-r--r-- | src/boost/libs/mpi/example/random_min.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/boost/libs/mpi/example/random_min.cpp b/src/boost/libs/mpi/example/random_min.cpp new file mode 100644 index 00000000..d0a67ee0 --- /dev/null +++ b/src/boost/libs/mpi/example/random_min.cpp @@ -0,0 +1,30 @@ +// 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; +} |