// PriceList.h #pragma once #include <string> #include <stdexcept> #include \"Pr

Question

// 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
}

};
====================================================================================================================================
PriceListItem.h
#pragma once
#include <string>
using namespace std;
class PriceListItem {
public:
PriceListItem();
PriceListItem(const string &itemName, const string &code, double price, bool taxable);
string getItemName();
string getCode();
double getPrice();
bool isTaxable();
private:
// any private member variables and methods go here
// TO BE COMPLETED
};
=======================================================================================================================================
PriceListItem cpp.
#include "PriceListItem.h"
PriceListItem::PriceListItem(const string &itemName, const string &code, double price, bool taxable) {
// TO BE COMPLETED
}
PriceListItem::PriceListItem() {
// TO BE COMPLETED
}
string PriceListItem::getItemName() {
// TO BE COMPLETED
}
string PriceListItem::getCode() {
// TO BE COMPLETED
}
double PriceListItem::getPrice() {
// TO BE COMPLETED
}
bool PriceListItem::isTaxable() {
// TO BE COMPLETED
}
=========================================================================================================================================
GroceryBill.h
#pragma once
#include "PriceList.h"
class GroceryBill {
public:
GroceryBill(const PriceList *priceList, double taxRate);
void scanItem(string scanCode, double quantity); // add item and quantity to bill; throw exception if item's code is not found in the pricelist
void scanItemsFromFile(string filename); // Scan multiple codes and quantities from the given text file
double getTotal(); // return the total cost of all items scanned
void printBill(); // Print the bill to cout. Each line contains the name of an item, total price, and the letter "T" if tax was addded.
private:
// any private member variables and methods go here
// TO BE COMPLETED
// testing
};
=========================================================================================================================================
GroceryBill cpp.
#include "GroceryBill.h"
#include <iostream>
using namespace std;
GroceryBill::GroceryBill(const PriceList *priceList, double taxRate) {
// To be completed
}

void GroceryBill::scanItem(string scanCode, double quantity) {
// To be completed
}
// Scan multiple codes and quantities from the given text file
// Each line contains two numbers separated by space: the first is the code (an integer), the second the quantity (a float/double)
// Example line from text file:
// 15000000 1.5
void GroceryBill::scanItemsFromFile(string filename) {
// To be completed
// HINT: Look at code in PriceList::createPriceListFromDatafile(string filename)
}
// return the total cost of all items scanned
double GroceryBill::getTotal() {
// To be completed
}
// Print the bill to cout. Each line contains the name of an item, total price, and the letter "T" if tax was addded.
// The last line shows the total.
// An example:
//Plastic_Wrap 1.60547 T
//Sugar_white 5.475
//Waffles_frozen 5.16
//Oil_Canola_100%_pure 2.69
//Potatoes_red 13.446
//TOTAL 28.3765
void GroceryBill::printBill() {
// 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

PROGRAM CODE:

// PriceList.h

#pragma once

#include <string>

#include <stdexcept>

#include "PriceListItem.h"

using namespace std;

class PriceList {

public:

PriceList();

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

private PriceListItem *items;

int size;

};

//===================================================================================================================================

Pricelist cpp.

#include <string>

#include <iostream>

#include <fstream>

#include <stdexcept>

#include "PriceList.h"

#include "PriceListItem.h"

using namespace std;

//constructor to initialize variables

PriceList::PriceList()

{

//this will grow dynamically

items = new PriceList[100];

size = 0;

}

// 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 {

for(int i=0; i<size; i++)

{

if(items[i].getCode() == code)

return true;

}

return false;

}

// return price, item name, taxable? as an ItemPrice object; throw exception if code is not found

PriceListItem PriceList::getItem(string code) const {

for(int i=0; i<size; i++)

{

if(items[i].getCode() == code)

return items[i];

}

throw invalid_argument("Invalid code: " + code);

}

// add to the price list information about a new item

void PriceList::addEntry(string itemName, string code, double price, bool taxable) {

if(size < 1000000)

items[size++] = new PriceListItem(itemName, code, price, taxable);

throw invalid_argument("Max of 1000000 items reached");

}

};

//====================================================================================================================================

PriceListItem.h

#pragma once

#include <string>

using namespace std;

class PriceListItem {

public:

PriceListItem();

PriceListItem(const string &itemName, const string &code, double price, bool taxable);

string getItemName();

string getCode();

double getPrice();

bool isTaxable();

private:

// any private member variables and methods go here

string itemName;

string code;

double price;

bool taxable;

};

//=======================================================================================================================================

PriceListItem cpp.

#include "PriceListItem.h"

PriceListItem::PriceListItem(const string &itemName, const string &code, double price, bool taxable) {

this.itemName = itemName;

this.code = code;

this.price = price;

this.taxable = taxable;

}

PriceListItem::PriceListItem() {

this.itemName = "";

this.code = "";

this.price = 0;

this.taxable = false;

}

string PriceListItem::getItemName() {

return this.itemName;

}

string PriceListItem::getCode() {

return this.code;

}

double PriceListItem::getPrice() {

return this.price;

}

bool PriceListItem::isTaxable() {

return this.taxable;

}

//=========================================================================================================================================

GroceryBill.h

#pragma once

#include "PriceList.h"

class GroceryBill {

public:

GroceryBill(const PriceList *priceList, double taxRate);

void scanItem(string scanCode, double quantity); // add item and quantity to bill; throw exception if item's code is not found in the pricelist

void scanItemsFromFile(string filename); // Scan multiple codes and quantities from the given text file

double getTotal(); // return the total cost of all items scanned

void printBill(); // Print the bill to cout. Each line contains the name of an item, total price, and the letter "T" if tax was addded.

private:

// any private member variables and methods go here

PriceList itemList;

int billItemCount;

double taxRate;

double billAmount;

string *codes;

double *qty;

// testing

};

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

GroceryBill cpp.

#include "GroceryBill.h"

#include <iostream>

using namespace std;

GroceryBill::GroceryBill(const PriceList *priceList, double taxRate) {

this.itemList = priceList;

this.taxRate = taxRate;

billAmount = 0;

billItemCount = 0;

codes = new string[100];

qty = new double[100];

}

void GroceryBill::scanItem(string scanCode, double quantity) {

PriceListItem item = itemList.getItem(scanCode);

billAmount += item.getPrice()*quantity;

if(item.isTaxable())

billAmount += item.getPrice()*quantity*taxRate;

codes[billItemCount] = scanCode;

qty[billItemCount++] = quantity;

}

// Scan multiple codes and quantities from the given text file

// Each line contains two numbers separated by space: the first is the code (an integer), the second the quantity (a float/double)

// Example line from text file:

// 15000000 1.5

void GroceryBill::scanItemsFromFile(string filename) {

// To be completed

// HINT: Look at code in PriceList::createPriceListFromDatafile(string filename)

ifstream myfile(filename);

if (myfile.is_open()) {

cout << "Successfully opened file " << filename << endl;

string code;

double qty;

while (myfile >> code >> qty) {

scanItem(code, qty);

}

myfile.close();

}

else

throw invalid_argument("Could not open file " + filename);

}

// return the total cost of all items scanned

double GroceryBill::getTotal() {

return billAmount;

}

// Print the bill to cout. Each line contains the name of an item, total price, and the letter "T" if tax was addded.

// The last line shows the total.

// An example:

//Plastic_Wrap 1.60547 T

//Sugar_white 5.475

//Waffles_frozen 5.16

//Oil_Canola_100%_pure 2.69

//Potatoes_red 13.446

//TOTAL 28.3765

void GroceryBill::printBill() {

for(int i=0; i<billItemCount; i++)

{

cout<<priceList.getItem(codes[i]).getItemName()<<" "<<qty[i]<<" ";

if(priceList.getItem(codes[i]).isTaxable())

cout<<"T";

cout<<endl;

}

}

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