#ifndef _doublelist_h
#define _doublelist_h

#include <cstdio>
#include <iostream>
#include <iomanip>


using namespace std;




/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/
/*-------------------------------------------------------------------------*/


/*-------------------------------------------------------------------------
Here we define the class LinkList which is a linked list. The Items link 
have as data a deviation. Deviations of all kind get stored in this linked
list.
-------------------------------------------------------------------------*/


struct doublelink
	{
	double dd;
	doublelink* next;
	doublelink* previous;
	};

/*-------------------------------------------------------------------------*/

class DoubleList {
	private:
		struct doublelink* first;
		struct doublelink* last;
		double value;
		int AmountElements;
		int barrier;

	public:
        int additem(double d);
        void display();
        int IsEmpty();
        double getValue();

		DoubleList(int b) :
			barrier(b)
        {	first          = NULL;
        	last  	       = NULL;
			value          = 0.0;
			AmountElements = 0;
        }

    };




















#endif