/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*//*             ********   ***                                 SparseLib++    *//*          *******  **  ***       ***      ***                              *//*           *****      ***     ******** ********                            *//*            *****    ***     ******** ********              R. Pozo        *//*       **  *******  ***   **   ***      ***                 K. Remington   *//*        ********   ********                                 A. Lumsdaine   *//*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*//*                                                                           *//*                                                                           *//*                     SparseLib++ : Sparse Matrix Library                   *//*                                                                           *//*               National Institute of Standards and Technology              *//*                        University of Notre Dame                           *//*              Authors: R. Pozo, K. Remington, A. Lumsdaine                 *//*                                                                           *//*                                 NOTICE                                    *//*                                                                           *//* Permission to use, copy, modify, and distribute this software and         *//* its documentation for any purpose and without fee is hereby granted       *//* provided that the above notice appear in all copies and supporting        *//* documentation.                                                            *//*                                                                           *//* Neither the Institutions (National Institute of Standards and Technology, *//* University of Notre Dame) nor the Authors make any representations about  *//* the suitability of this software for any purpose.  This software is       *//* provided ``as is'' without expressed or implied warranty.                 *//*                                                                           *//*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/#ifndef DIAGPRE_H#define DIAGPRE_H#include "vecdefs.h"#include VECTOR_H#include "comprow_double.h"#include "compcol_double.h"class DiagPreconditioner_double { private:  VECTOR_double diag_; public:  DiagPreconditioner_double (const CompCol_Mat_double &);  DiagPreconditioner_double (const CompRow_Mat_double &);  ~DiagPreconditioner_double (void) { };  VECTOR_double solve (const VECTOR_double &x) const;  VECTOR_double trans_solve (const VECTOR_double &x) const;    const double&         diag(int i) const { return diag_(i); }  double&           diag(int i) { return diag_(i); }};#endif