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example
verySimple_LL
example/verySimple_LL/cxx_main.cpp
Go to the documentation of this file.
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//@HEADER
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// ************************************************************************
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//
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// Epetra: Linear Algebra Services Package
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// Copyright 2011 Sandia Corporation
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//
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// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// the U.S. Government retains certain rights in this software.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the Corporation nor the names of the
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
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//
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// ************************************************************************
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//@HEADER
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#include "
Epetra_SerialComm.h
"
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#include "
Epetra_Map.h
"
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#include "
Epetra_Vector.h
"
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#include "
Epetra_Version.h
"
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int
main
(
int
argc,
char
*argv[])
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{
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std::cout <<
Epetra_Version
() << std::endl << std::endl;
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Epetra_SerialComm
Comm;
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int
NumElements = 1000;
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// Construct a Map with NumElements and index base of 0
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Epetra_Map
Map(NumElements, 0, Comm);
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// Create x and b vectors
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Epetra_Vector
x(Map);
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Epetra_Vector
b(Map);
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b.
Random
();
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x.
Update
(2.0, b, 0.0);
// x = 2*b
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double
bnorm, xnorm;
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x.
Norm2
(&xnorm);
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b.
Norm2
(&bnorm);
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std::cout <<
"2 norm of x = "
<< xnorm << std::endl
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<<
"2 norm of b = "
<< bnorm << std::endl;
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return
0;
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}
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Epetra_Map
Epetra_Map: A class for partitioning vectors and matrices.
Definition:
Epetra_Map.h:119
Epetra_MultiVector::Random
int Random()
Set multi-vector values to random numbers.
Definition:
Epetra_MultiVector.cpp:490
Epetra_Vector
Epetra_Vector: A class for constructing and using dense vectors on a parallel computer.
Definition:
Epetra_Vector.h:142
Epetra_Version
std::string Epetra_Version()
Definition:
Epetra_Version.h:47
Epetra_SerialComm.h
Epetra_SerialComm
Epetra_SerialComm: The Epetra Serial Communication Class.
Definition:
Epetra_SerialComm.h:61
Epetra_MultiVector::Update
int Update(double ScalarA, const Epetra_MultiVector &A, double ScalarThis)
Update multi-vector values with scaled values of A, this = ScalarThis*this + ScalarA*A.
Definition:
Epetra_MultiVector.cpp:1276
Epetra_MultiVector::Norm2
int Norm2(double *Result) const
Compute 2-norm of each vector in multi-vector.
Definition:
Epetra_MultiVector.cpp:1547
Epetra_Map.h
Epetra_Vector.h
main
int main(int argc, char *argv[])
Definition:
example/C_wrappers/c_main.c:49
Epetra_Version.h
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