// @HEADER // *********************************************************************** // // Didasko Tutorial Package // Copyright (2005) Sandia Corporation // // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive // license for use of this work by or on behalf of the U.S. Government. // // This library is free software; you can redistribute it and/or modify // it under the terms of the GNU Lesser General Public License as // published by the Free Software Foundation; either version 2.1 of the // License, or (at your option) any later version. // // This library is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU // Lesser General Public License for more details. // // You should have received a copy of the GNU Lesser General Public // License along with this library; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 // USA // // Questions about Didasko? Contact Marzio Sala (marzio.sala _AT_ gmail.com) // // *********************************************************************** // @HEADER #include "Didasko_ConfigDefs.h" #ifdef HAVE_MPI #include "mpi.h" #endif #if defined(HAVE_DIDASKO_TEUCHOS) #include "Teuchos_LAPACK.hpp" #include "Teuchos_SerialDenseMatrix.hpp" #include "Teuchos_SerialDenseVector.hpp" int main(int argc, char* argv[]) { #ifdef HAVE_MPI MPI_Init(&argc,&argv); #endif // Creating an instance of the LAPACK class for double-precision routines looks like: Teuchos::LAPACK<int, double> lapack; // This instance provides the access to all the LAPACK routines. Teuchos::SerialDenseMatrix<int, double> My_Matrix(4,4); Teuchos::SerialDenseVector<int, double> My_Vector(4); My_Matrix.random(); My_Vector.random(); // Perform an LU factorization of this matrix. int ipiv[4], info; char TRANS = 'N'; lapack.GETRF( 4, 4, My_Matrix.values(), My_Matrix.stride(), ipiv, &info ); // Solve the linear system. lapack.GETRS( TRANS, 4, 1, My_Matrix.values(), My_Matrix.stride(), ipiv, My_Vector.values(), My_Vector.stride(), &info ); // Print out the solution. cout << My_Vector << endl; #ifdef HAVE_MPI MPI_Finalize(); #endif return 0; } #else #include <stdlib.h> #include <stdio.h> int main(int argc, char *argv[]) { #ifdef HAVE_MPI MPI_Init(&argc,&argv); #endif puts("Please configure Didasko with:\n" "--enable-teuchos"); #ifdef HAVE_MPI MPI_Finalize(); #endif return 0; } #endif