A buying order for a retail store like or Walmart has a list of items, each with its name, quantity, price, and the sales tax rate. Here is an example:

ID       Description                      Quantity      Price      Tax rate
B003   C++ Programming CD          2             30.5       3.5%
A001   iPhone 6 Plus                         1             700          7%
A002   Macbook Pro                        1             800          7%

Task 1. Declare a struct OrderItem to help store information for an item in an order.

Task 2. Declare a class Order (within the submitted cpp file) with the following requirements:

a. Have an array of OrderItem structs to store the items of an order. Since the number of ordered items in an order varies, and this class should have a field to store that number and the array of OrderItem should be a dynamic array.

b. Have two methods to load and save the order to a CSV (comma-separated values) file. Their prototypes are
void loadCSV(char *filename);
void saveCSV(char *filename);

For example, the previous order will be saved as a CSV file with the following content:
B003,C++ Programming CD,2,30.5,3.5%
A001,iPhone 6 Plus,1,700,7%
A002,Macbook Pro,1,800,7%

Hint: When loading an order from a CSV file, you should read it quickly to determine the number of items. Then you can allocate the array of OrderItem with size given by that number. Finally you re-read the file and parse each line as an item in that array.

c. Have a method to compute the total of an order, including taxes. For example, the previous order has the total of
2 * 30.5 * (1 + 0.035) + 1 * 700 * (1 + 0.07) + 1 * 800 * (1 + 0.07) = 1668.135
Its prototype is:
double computeTotal()

d. Have a method to update the quantity of an item in an order. Its prototype is
void updateQuantity(string itemID, int quantity)

For example, if the shopper decides to buy one C++ Programming CD rather than two, this function will be called by:
order.updateQuantity("B003", 1);

This function should compare the old quantity and the new quantity and print out an error message if they are the same.

Task 3. Write a main() function to test your code. The testing procedure is as the following:
1 Load the order from a CSV file.
2 Compute the total and compare it with your pre-computed value.
3 Update quantity of two different items in the order.
4 Save the updated order to another CSV file and manually check that file.

You will create at least two CSV files for this (Hint: You could use Excel to create them and pre-compute the totals). Remember to attach those two CSV files as comments in the submitted cpp file.

Solution PreviewSolution Preview

This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.

#include <iostream>
#include <string>
#include <fstream>

using namespace std;

struct OrderItem {
    int quantity;
    string description, id;
    double price, taxRate;

class Order {
    OrderItem *items;
    int arraySize;

    void loadCSV(char *fileName)
   arraySize = 0;
   string data;
   ifstream inFile;;
cout << "File: " << fileName << " does not exist, exiting program...\n";
   getline(inFile, data);
   while(getline(inFile, data))

   items = new OrderItem[200];

   getline(inFile, data);
   for(int i = 0; i < arraySize; i++)
$30.00 for this solution

PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

Find A Tutor

View available C-Family Programming Tutors

Get College Homework Help.

Are you sure you don't want to upload any files?

Fast tutor response requires as much info as possible.

Upload a file
Continue without uploading

We couldn't find that subject.
Please select the best match from the list below.

We'll send you an email right away. If it's not in your inbox, check your spam folder.

  • 1
  • 2
  • 3
Live Chats