Epetra Package Browser (Single Doxygen Collection) Development
Loading...
Searching...
No Matches
example/UG_ExMaps/cxx_main.cpp
Go to the documentation of this file.
1//@HEADER
2// ************************************************************************
3//
4// Epetra: Linear Algebra Services Package
5// Copyright 2011 Sandia Corporation
6//
7// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
8// the U.S. Government retains certain rights in this software.
9//
10// Redistribution and use in source and binary forms, with or without
11// modification, are permitted provided that the following conditions are
12// met:
13//
14// 1. Redistributions of source code must retain the above copyright
15// notice, this list of conditions and the following disclaimer.
16//
17// 2. Redistributions in binary form must reproduce the above copyright
18// notice, this list of conditions and the following disclaimer in the
19// documentation and/or other materials provided with the distribution.
20//
21// 3. Neither the name of the Corporation nor the names of the
22// contributors may be used to endorse or promote products derived from
23// this software without specific prior written permission.
24//
25// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
26// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
29// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
30// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
31// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
32// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36//
37// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
38//
39// ************************************************************************
40//@HEADER
41
42
43#include <stdio.h>
44#include <stdlib.h>
45#include "Epetra_config.h"
46#ifdef HAVE_MPI
47#include "mpi.h"
48#include "Epetra_MpiComm.h"
49#else
50#include "Epetra_SerialComm.h"
51#endif
52#include "Epetra_Map.h"
54#include "Epetra_Version.h"
55
56// prototype
57int main(int argc, char *argv[]) {
58#ifdef HAVE_MPI
59 MPI_Init(&argc,&argv);
60 Epetra_MpiComm Comm(MPI_COMM_WORLD);
61#else
63#endif
64
65 if (Comm.MyPID()==0)
66 std::cout << Epetra_Version() << std::endl << std::endl;
67
68 std::cout << Comm << std::endl; // Print out process information
69 // Get the number of global equations from the command line
70 if (argc!=2) {
71 std::cout << "Usage: " << argv[0] << " number_of_equations" << std::endl;
72 exit(1);
73 }
74 int NumGlobalElements = atoi(argv[1]);
75 // Construct a Map that puts approximately the same number of
76 // equations on each processor.
77 Epetra_Map Map(NumGlobalElements, 0, Comm);
78 // Get update list and number of local equations from newly created Map.
79 std::cout << Map << std::endl;
80#ifdef UG_EX1_MPI
81 MPI_Finalize() ;
82#endif
83return 0;
84}
std::string Epetra_Version()
Epetra_Map: A class for partitioning vectors and matrices.
Definition: Epetra_Map.h:119
Epetra_MpiComm: The Epetra MPI Communication Class.
int MyPID() const
Return my process ID.
Epetra_SerialComm: The Epetra Serial Communication Class.
int main(int argc, char *argv[])