//This is the file: pfarraydbak.cpp. 
//This is the implementation of the class PFArrayDBak.
//The interface for the class PFArrayDBak is in the file pfarraydbak.h.
#include "pfarraydbak.h"
#include <iostream>
using std::cout;

PFArrayDBak::PFArrayDBak( ) : PFArrayD( ), usedB(0)
{
    b = new double[capacity];
}

PFArrayDBak::PFArrayDBak(int capacityValue) : PFArrayD(capacityValue), usedB(0)
{
    b = new double[capacity];
}

PFArrayDBak::PFArrayDBak(const PFArrayDBak& oldObject) 
              : PFArrayD(oldObject), usedB(0)
{
    b = new double[capacity];
    usedB = oldObject.usedB;
    for (int i = 0; i < usedB; i++)
        b[i] = oldObject.b[i];
}

void PFArrayDBak::backup( )
{
    usedB = used;
    for (int i = 0; i < usedB; i++)
        b[i] = a[i];
}

void PFArrayDBak::restore( )
{
    used = usedB;
    for (int i = 0; i < used; i++)
        a[i] = b[i];
}

PFArrayDBak& PFArrayDBak::operator =(const PFArrayDBak& rightSide)
{
    PFArrayD::operator =(rightSide);
    if (capacity != rightSide.capacity)
    {
        delete [] b;
        b = new double[rightSide.capacity];
    }

    usedB = rightSide.usedB;
    for (int i = 0; i < usedB; i++)
        b[i] = rightSide.b[i];

    return *this;
}

PFArrayDBak::~PFArrayDBak( )
{
    delete [] b;
}