listofparts.cpp

linkeslist icarnegie

#include "stdafx.h"
#include "ListOfParts.h"

//---------------------------------------------------------------------------
ListOfParts::ListOfParts()
	: size(0), Head(NULL)
{
}
//---------------------------------------------------------------------------
int ListOfParts::Count()
{
	return size;
}
//---------------------------------------------------------------------------
int ListOfParts::Add(CarPart *NewItem)
{
	CarPart *Sample = new CarPart;

	Sample          = NewItem;
	Sample->Next    = Head;
	Head            = Sample;
	return size++;
}
//---------------------------------------------------------------------------
CarPart *ListOfParts::Retrieve(int Position)
{
	CarPart *Current = Head;
	
	for(int i = 0; i < Position && Current != NULL; i++)
	{
		Current = Current->Next;
	}

	return Current;
}
//---------------------------------------------------------------------------
bool ListOfParts::Delete()
{
	if( Head == NULL )
	{
		std::cout << "The list is empty\n";
		return false;
	}
	else
	{
		CarPart *Current;

		Current = Head->Next;
		Head->Next = Current->Next;
		size--;
		return true;
	}
}
//---------------------------------------------------------------------------
bool ListOfParts::Delete(int Position)
{
	if( Retrieve(Position) == NULL )
		return false;
	else
	{
		Retrieve(Position - 1)->Next = Retrieve(Position+1);
		size--;
		return true;
	}
}
//---------------------------------------------------------------------------
bool ListOfParts::Find(CarPart* ItemToFind)
{
	CarPart *Current;

	if( ItemToFind == NULL )
		return false;
	for(Current = Head; Current != NULL; Current = Current->Next)
	{
		if( (Current->PartNumber == ItemToFind->PartNumber) &&
			(strcmp(Current->PartName, ItemToFind->PartName) == 0) &&
			(Current->UnitPrice == ItemToFind->UnitPrice) )
			return true;
		else
			Current->Next;
	}

	return false;
}
//---------------------------------------------------------------------------