column.h

#ifndef SCIL_COLUMN_H
#define SCIL_COLUMN_H

#include<LEDA/list.h>
#include<scil/column_entry.h>

namespace SCIL {

class column {

 public:
  LEDA_MEMORY(column)

  typedef LEDA::list_item item;

  private:
  LEDA::list<column_entry> NZ;

  public:

  column() {
  };

  column(double d);

  column(cons c); 

  column(LEDA::list<column_entry>& L);

  column operator* (double d);

  column operator+ (column c1);

  column operator+ (cons c1);

  column operator+ (double d);

  column operator- (column c1);

  column& operator+= (column c1);

  column& operator-= (column r);

  void normalize();

  column_entry inf(const item i) const;

  int size();

  item first_item() const;
  
  item next_item(item i) const;

};

/*{\Mtext {\bf forall\_items}($it,L$)       
  $\{$ ``the items of $L$ are successively assigned to $it$'' $\}$}*/

column operator*(double d, cons c1);

column operator*(double d, column c1);

}

#endif

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