Q$4)$

Write a C$++$ program that implements a shopping cart. User can login as Admin or customer. Admin can add new products, update the name and price of old products. A product Class has $3$ attributes product ID $($PID$),$ product name and price. All products will be saved in a file "product.txt$"$ in following form

product.bxt

$50$

$\backslash$table$[[$PID$,$Product$\_$name,Price$],[$P$1,$Board$\_$marker,$40],[$P$2,$Ink,$70],[$P$3,$High$\_$Lighter,$60],[$P$4,$Paper$-$Clip,$120]]$

Do not allow duplicate Product ID$.$

For customers, The program should display the catalog to the customers from "product.txt$".$ The program should aceept PII$)$ and required quantity of product until user enters $\text{'}B\text{'}$ and display all products and total bill and save this in a file "bill.txt$"$

Console Output:

PID Product$\_$name

P$1$ Board$\_$marker

P$2$ Ink

P$3$ High$\_$Lighter

P$4$ Paper$-$Clip

Enter product ID and quantity

Press $B$ to calculate bill

P$21$

P$12$

B

Your Bill is:

$\backslash$table$[[$PID$,$Quantity,Price,Total$],[$P$2,1,70,70],[$P$1,2,40,80]]$

Total Bill is: $150$

Make sure that you use concepts till Object oriented programming excluding vectors