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LAPACK/cxx_main.cpp

This is an example of how to use the Teuchos::LAPACK class.

/*
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// Teuchos: Common Tools Package
// Copyright (2004) Sandia Corporation
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// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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#include "Teuchos_Version.hpp"
int main(int argc, char* argv[])
{
std::cout << Teuchos::Teuchos_Version() << std::endl << std::endl;
// Creating an instance of the LAPACK class for double-precision routines looks like:
// This instance provides the access to all the LAPACK routines.
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.
std::cout << My_Vector << std::endl;
return 0;
}