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example/C_wrappers/c_main.c
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00001 /*
00002 //@HEADER
00003 // ************************************************************************
00004 // 
00005 //               Epetra: Linear Algebra Services Package 
00006 //                 Copyright 2011 Sandia Corporation
00007 // 
00008 // Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
00009 // the U.S. Government retains certain rights in this software.
00010 //
00011 // Redistribution and use in source and binary forms, with or without
00012 // modification, are permitted provided that the following conditions are
00013 // met:
00014 //
00015 // 1. Redistributions of source code must retain the above copyright
00016 // notice, this list of conditions and the following disclaimer.
00017 //
00018 // 2. Redistributions in binary form must reproduce the above copyright
00019 // notice, this list of conditions and the following disclaimer in the
00020 // documentation and/or other materials provided with the distribution.
00021 //
00022 // 3. Neither the name of the Corporation nor the names of the
00023 // contributors may be used to endorse or promote products derived from
00024 // this software without specific prior written permission.
00025 //
00026 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
00027 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00028 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00029 // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
00030 // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00031 // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00032 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00033 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00034 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00035 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00036 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00037 //
00038 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00039 // 
00040 // ************************************************************************
00041 //@HEADER
00042 */
00043 
00044 #ifdef EPETRA_MPI
00045 #include <mpi.h>
00046 #endif
00047 #include "Epetra_C_wrappers.h"
00048 
00049 int main(int argc, char *argv[]) {
00050   int i;
00051   EPETRA_OBJECT_PTR Comm, Map, X, Y;
00052   int MyPID, NumProc;
00053   int NumGlobalElements;
00054   int NumMyElements;
00055 
00056 #ifdef EPETRA_MPI
00057   /* Initialize MPI */
00058   MPI_Init(&argc,&argv);
00059   Comm = epetra_mpicomm_create2( MPI_COMM_WORLD );
00060 #else
00061   Comm = epetra_serialcomm_create();
00062 #endif
00063 
00064    MyPID = epetra_comm_mypid(Comm);
00065    NumProc = epetra_comm_numproc(Comm);
00066 
00067 
00068    /* Construct a Map that puts 2 elements on each PE */
00069 
00070    NumGlobalElements = 2*NumProc;
00071    Map = epetra_map_create1(NumGlobalElements, 0, Comm);
00072   
00073  
00074   X = epetra_vector_create1(Map);
00075   Y = epetra_vector_create1(Map);
00076 
00077   epetra_vector_random(X);
00078   epetra_vector_random(Y);
00079   printf("Contents of X vector\n");
00080   epetra_vector_print(X);
00081 
00082 
00083   printf("Contents of Y vector\n");
00084   epetra_vector_print(Y);
00085 
00086   /* Add X and Y (need to pass Y twice for now, since this is the only update 
00087      interface wrapped by C at this time) */
00088   epetra_vector_update(X, 1.0, Y, 0.0, Y, 1.0);
00089 
00090   printf("Sum of X and Y vectors\n");
00091   epetra_vector_print(X);
00092 
00093   epetra_vector_destroy(X);
00094   epetra_vector_destroy(Y);
00095   epetra_map_destroy(Map);
00096   epetra_comm_destroy(Comm);
00097   
00098 #ifdef EPETRA_MPI
00099   MPI_Finalize() ;
00100 #endif
00101 
00102 /* end main
00103 */
00104 return 0 ;
00105 }
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