// -*- c++ -*-

 #ifndef LEMON_LP_BASE_H

 #define LEMON_LP_BASE_H

 ///\file

 ///\brief The interface of the LP solver interface.

 namespace lemon {

   class LpSolverBase {

   protected:

     //MATRIX MANIPULATING FUNCTIONS

     /// \e

     virtual int _addCol() = 0;

     /// \e

     virtual int _addRow() = 0;

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     virtual void _setRowCoeffs(int i, 

                                int  * &indices, 

                                double  * &doubles ) = 0;

     /// \e

     /// \warning Arrays are indexed from 1 (datum at index 0 is ignored)

     virtual void _setColCoeffs(int i, 

                                int  * &indices, 

                                double  * &doubles ) = 0;

   }  

 } //namespace lemon

 #endif //LEMON_LP_BASE_H