// -*- c++ -*-//// Copyright 1997, 1998, 1999 University of Notre Dame.// Authors: Andrew Lumsdaine, Jeremy G. Siek, Lie-Quan Lee//// This file is part of the Matrix Template Library//// You should have received a copy of the License Agreement for the// Matrix Template Library along with the software;  see the// file LICENSE.  If not, contact Office of Research, University of Notre// Dame, Notre Dame, IN  46556.//// Permission to modify the code and to distribute modified code is// granted, provided the text of this NOTICE is retained, a notice that// the code was modified is included with the above COPYRIGHT NOTICE and// with the COPYRIGHT NOTICE in the LICENSE file, and that the LICENSE// file is distributed with the modified code.//// LICENSOR MAKES NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED.// By way of example, but not limitation, Licensor MAKES NO// REPRESENTATIONS OR WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY// PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE COMPONENTS// OR DOCUMENTATION WILL NOT INFRINGE ANY PATENTS, COPYRIGHTS, TRADEMARKS// OR OTHER RIGHTS.//// $Id: getrf.cc,v 1.2 2000/08/28 15:22:59 jsiek Exp $//#include <complex>#include "mtl/mtl2lapack.h"#include "mtl/dense1D.h"#include "mtl/utils.h"/*  Sample Output  A:  3x3  [  [1,2,2],  [2,1,2],  [2,2,1]  ]  b:  3x1  [  [15],  [15],  [15]  ]  x:  3x1  [  [3],  [3],  [3]  ]  */intmain(){  using namespace mtl2lapack;  using namespace mtl;  const int M = 3;  const int N = 3;  const int NRHS = 1;  //begin  double da [] = { 1, 2, 2, 2, 1, 2, 2, 2, 1 };  lapack_matrix<double,external>::type A(da, M, N);  lapack_matrix<double>::type B(M*NRHS, NRHS);  mtl::set(B, 15.0);  dense1D<int> pivot(N, 0);  //end  std::cout << "A:" << std::endl;  print_all_matrix(A);  std::cout << "b:" << std::endl;  print_all_matrix(B);  // Factor A, solve the system, and print the solution.  //begin  int info = getrf(A, pivot);  //end  print_all_matrix(A);  std::cout << "pivots" << std::endl;  print_vector(pivot);  //begin  if (info == 0) {    info = getrs('N', A, pivot, B);    if (info == 0) {      std::cout << "x:" << std::endl;      print_all_matrix(B);    } else      std::cout << "Factorization failed with INFO = " << info << std::endl;  } else    std::cout << "Solve failed with INFO = " << info << std::endl;  //end  return 0;}