Objectives:

Students will use class inheritance to solve a problem

Students will write correct, will$-$documented and readable programs in a reasonable

amount of time.

Problem Description:$|$

When shopping online, you select items and add them to a shopping cart. Duplicate items

are permitted in a shopping cart, as you can purchase multiples of the same item. You

also can remove an item from a shopping cart, if you change your mind about buying it$.$

The shopping cart can show its current contents with their prices and the total cost of

these items. Design the ADT item and shopping cart.

Task $1-$ Item $($a regular class, not a template$)$

Declare three data members: name of item, unit price of item, and quantity of

item

Define a default constructor

Define a constructor that initializes all three data members by the parameters.

Define set and get functions for each data member.

Define the following operators:

Equal to: $==$

two items are same if their name and price are same; quantity is

required to be same!

Input : $>>$

Output: $$

$!!$Test the class Item before you move to next task!!

Task $2-$ Shopping cart $($a regular class, not a template$)$

@ Design the shopping cart as a derived class from the Bag class using

public inheritance as follows:

class ShoppingCart:public Bag#include "ShoppingCart.cpp$"$

$($before the line #endif$)$

$**$This is required to run your program correctly on centOS.

Testing

Design your test data to test ALL operations provided in the ShoppingCart:

Add

Remove $($ two cases: in the cart and not in the cart$)$

Change quantity $($two cases: in the cart and not in the cart$).$ If in the cart, validate

the quantity.

The running result of the program must look like this:

g$++$ project$2.$cpp

a$.$out

Welcome to XXX SHOPPING CENTER.

Enter the item you selected as the following order:

name unitprice quantity

$($Name can not contain any space. Otherwise errors happen!$)$

$-->$ T$-$shirt $19\mathrm{.}992$

Want to continue $\frac{y}{n}-y$

$-->$Sweater $39\mathrm{.}992$

Want to continue $\frac{y}{n}-y$

$-->$iphone case $25\mathrm{.}503$

Want to continue $\frac{y}{n}-y$

$-->$Towel $9\mathrm{.}995$

Want to continue $\frac{y}{n}-n$

Here is your order:

Name

T$-$shirt

Sweater

iphone case

Towel

The total charge is $$246\mathrm{.}41$

Want to modify your order? y$/$n$-->$y

What do you want? Enter $1$: add $2$: remove $3$: change quantity

$-1$

Enter the item to add as the following order:

name unitprice quantity$-->$ shoe $99\mathrm{.}991$

The item has been added.

Want to modify your order? y$/$n$-->$y

What do you want? Enter $1$: add $2$: remove $3$: change quantity

$-->2$

Enter the item to remove as the following order:

name unitprice quantity

$-->$ Sweater $29\mathrm{.}992$

No such item in your shopping cart!

Want to modify your order? y$/$n$-->$y

What do you want? Enter $1$: add $2$: remove $3$: change quantity

$-->2$

Enter the item to remove as the following order:

name unitprice quantity

$-->$ Sweater $39\mathrm{.}992$

The item has been removed.

Want to modify your order? y$/$n$-->$y

What do you want? Enter $1$: add $2$: remove $3$: change quantity

$-->3$

Enter the item to change as the following order:

name unitprice quantity

$-->$ Towel $9\mathrm{.}995$

Enter a new quantity $-->-2$

$-2$ is not a valid input.

Enter a new quantity $-->2$

The quantity has been modified.

Want to modify your order? y$/$n$-->$n

Here is your updated order:

You have ordered the following items:

Name

T$-$shirt

Shoe

iphone case

Towel

The total charge is $$236\mathrm{.}45$

Thanks for shopping in XXX SHOPPING CENTER.

Other requirements

For each program, add the following information at the top of the file: