here is the header file and cpp file for priceList just need to fill the mising

ID: 3888742 • Letter: H

Question

here is the header file and cpp file for priceList just need to fill the mising things

// PriceList.h
#pragma once
#include <string>
#include <stdexcept>
#include "PriceListItem.h"
using namespace std;
class PriceList {
public:

void createPriceListFromDatafile(string filename); // Load information from a text file with the given filename (Completed)
void addEntry(string itemName, string code, double price, bool taxable); // add to the price list information about a new item. A max of 1,000,000 entries can be added
bool isValid(string code) const; // return true only if the code is valid
PriceListItem getItem(string code) const; // return price, item name, taxable? as an PriceListItem object; throw exception if code is not found
private:
// Add private member variables for your class along with any
// other variables required to implement the public member functions
// TO BE COMPLETED
===================================================================================================================================
Pricelist cpp.
#include <string>
#include <iostream>
#include <fstream>
#include <stdexcept>
#include "PriceList.h"
#include "PriceListItem.h"
using namespace std;
// Load information from a text file with the given filename.
void PriceList::createPriceListFromDatafile(string filename) {
ifstream myfile(filename);
if (myfile.is_open()) {
  cout << "Successfully opened file " << filename << endl;
  string name;
  string code;
  double price;
  bool taxable;
  while (myfile >> name >> code >> price >> taxable) {
   // cout << code << " " << taxable << endl;
   addEntry(name, code, price, taxable);
  }
  myfile.close();
}
else
  throw invalid_argument("Could not open file " + filename);
}
// return true only if the code is valid
bool PriceList::isValid(string code) const {
// TO BE COMPLETED
}
// return price, item name, taxable? as an ItemPrice object; throw exception if code is not found
PriceListItem PriceList::getItem(string code) const {
// TO BE COMPLETED
}
// add to the price list information about a new item
void PriceList::addEntry(string itemName, string code, double price, bool taxable) {
// TO BE COMPLETED
}

Objective You are given partial implementations of three classes. Briselist is a class to hold information of all items in the grocery store. There could be up to 1,000,000 items. The information of each item is its price barcode, item name, and whether it is taxable; these are kept together in Class RriceLigtItem. The items in PriceList are loaded all together from a text filel, or inserted one at a time. The complete grocery bill is computed in Class GrecervBill. To do so, it is given (a const pointer to) a previously created eieat to get the prices, and the tax rate percentage for taxable items when constructed. It is then given barcodes of items and their quantity. The barcodes can be given one at a time, or they can be collected together in a text file. You are to complete the implementations of these classes, adding public/private member variables and functions as needed. You should not use any of the C++ Standard Library containers (such as std::array, std::vector, std::list) for this project. Your code is tested in the provided main.cpp. Initially, the given code does not even compile. As you complete the code, it will pass the tests in the main

Explanation / Answer

=====================================================================

//PriceList.cpp

#include <string>
#include <iostream>
#include <fstream>
#include <stdexcept>
#include "PriceList.h"
#include "PriceListItem.h"
using namespace std;
// Load information from a text file with the given filename.
void PriceList::createPriceListFromDatafile(string filename)
{
   item_added=0;
ifstream myfile(filename);
if (myfile.is_open()) {
cout << "Successfully opened file " << filename << endl;
string name;
string code;
double price;
bool taxable;
while (myfile >> name >> code >> price >> taxable) {
   // cout << code << " " << taxable << endl;
   addEntry(name, code, price, taxable);
}
myfile.close();
}
else
throw invalid_argument("Could not open file " + filename);
}
// return true only if the code is valid
bool PriceList::isValid(string code) const
{
    // TO BE COMPLETED
    PriceListItem *temp = priceItemListHead;
       if(temp != NULL)
       {
           //compare the code with first item code, if found return true
           if(temp->getCode().compare(code)==0)
           {
               //code found
               return true;
           }
           //check if it has more items in there
           while(temp->nextItem != NULL)
           {
               //compare the code with each item code, if found return true
               if(temp->getCode().compare(code)==0)
               {
                   //item found
                   return true;
               }
               //go to the next item
               temp = temp->nextItem;
           }
       }
   //item with this code not found, so return false
   //item not valid
   return false;
}
// return price, item name, taxable? as an ItemPrice object; throw exception if code is not found
PriceListItem PriceList::getItem(string code) const {
    // TO BE COMPLETED
    PriceListItem *temp = priceItemListHead;
    //check if there is item in the list
       if(temp != NULL)
       {
           //compare the code with the first item
           if(temp->getCode().compare(code)==0)
           {
               //item found, return item
               return *temp;
           }
           //check if there are more items, if not found previously
           while(temp->nextItem != NULL)
           {
               //compare code with each item's code
               if(temp->getCode().compare(code)==0)
               {
                   //code matches, return item
                   return *temp;
               }
               //go to the next item
               temp = temp->nextItem;
           }
       }
   //item not found in the item list
   //return nothing
   return nullptr;
}
// add to the price list information about a new item
void PriceList::addEntry(string itemName, string code, double price, bool taxable) {
    // TO BE COMPLETED
    //check if list is not exceeding the limit
    if(item_added >= MAX_NUMBER_OF_ITEMS)
        return;
    //create a new item
   PriceListItem item(itemName,code,price,taxable);

   //make item next to NULL, if you have declared a nextItem pointer in PriceListItem
   item.nextItem =NULL;

   //copy the list in temp pointers
   PriceListItem *temp = priceItemListHead;
   //if the list is not empty
   if(temp != NULL)
   {
       while(temp->nextItem != NULL)
       {
           //go to next item, since we want to add this item in the last
           temp = temp->nextItem;
       }
       //insert item at the end.
       temp->nextItem = &newItem;
   }
   //if the list is empty
   else
   {
       //make it the first item of the list
       priceItemListHead = &newItem;
   }
   //increase number of items added
   item_added++;
}

/* //will return the item list, if required
PriceListItem* PriceList::getPriceList()
{
return itemList;
} */

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here is the header file and cpp file for priceList just need to fill the mising

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