#ifndef _sparsematrix_h_
#define _sparsematrix_h_

#include "matrix.h"
#include <map>
using namespace std;

class  SparseMatrix: public Matrix
{
public:
  SparseMatrix(int nrows, int ncols);
  
  ValType & operator()(int i, int j); 
  

private:  
  map<int, ValType> _values; 
};

#endif