18e34484fa
* Document --disable-mpi-cxx-seek * Document that you need to include "mpi.h" after system-level headers that create the SEEK_* constants * Make the C++ examples follow this behavior (include "mpi.h" after <iostream>) This commit was SVN r12123. The following Trac tickets were found above: Ticket 387 --> https://svn.open-mpi.org/trac/ompi/ticket/387
32 строки
1021 B
C++
32 строки
1021 B
C++
//
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// Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
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// University Research and Technology
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// Corporation. All rights reserved.
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// Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
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//
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// Sample MPI "hello world" application in C++
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//
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// MPI's C++ bindings unfortunately redefined some POSIX constants
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// (SEEK_SET and friends). Fortunately, most versions of <iostream>
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// and <stdio.h> are sane enough that if you include "mpi.h" first,
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// they won't redefine the problematic values. Note, however, that
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// this means that you should not make calls to fseek(3) (and friends)
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// in a C++ source file that includes <mpi.h>!
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#include <iostream>
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#include "mpi.h"
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int main(int argc, char **argv)
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{
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int rank, size;
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MPI::Init();
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rank = MPI::COMM_WORLD.Get_rank();
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size = MPI::COMM_WORLD.Get_size();
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std::cout << "Hello, world! I am " << rank << " of " << size << std::endl;
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MPI::Finalize();
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return 0;
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}
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