PROGRAMMING PROJECT: BUY ITEMS

Objectives:

$$ Use basic C$++$ constructs: if$,$ switch, and repetition $($looping$)$

$$ Perform simple data type manipulations

$$ Solve problem, design solution and implement using C$++$

Description:

Write a menu$-$driven program named $$BuyItems$.$cpp$$ that provides the following options:

$1.$ Buy items by asking for the item$$s description, price per item and the quantity

$2.$ Show receipts by listing all the purchases

$3.$ Show summary by listing only the number of purchases and the total purchase cost

Requirements:

$1.$ The program must produce the provided expected sample output.

$2.$ The user must enter the correct $$access code$$ which is one of the followings $(12345$ or

$54321)$ in order to start the program.

$3.$ The program should NOT have any global variables

$4.$ The program should have at least $3$ functions and some documentation including your

name and program$$s description

Required error handling:

The program MUST perform the following checks:

$1.$ Case$-$insensitive when to ask the user to confirm exiting the program $($e$.$g$.$ accepting both

$$Y$$ and $$y$)$

$2.$ Check for bad access code and allow up to $3$ trials.

$3.$ Check for negative or invalid price and$/$or quantity

$4.$ Check for invalid menu answer

Sample program run $1$

D:$\backslash >$BuyItems

Welcome to my shopping program.

Please enter the access code: $12345$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $-1$

Invalid selection. Please try it again.

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $5$

Invalid selection. Please try it again.

Shopping Menu:

$1.$ buy

$2.$ show receipt

$3.$ show summary

$4.$ exit the program

Enter your option: Hello

Invalid selection. Please try it again.

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $1$

Please enter the description: Book

Please enter the quantity: $10$

Please enter the price for each item: $5$

ITEM$($Book$)$ QUANTITY$(10)$ PRICE$($$$5\mathrm{.}00)$ COST$($$$50\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $1$

Please enter the description: CD

Please enter the quantity: $2$

Please enter the price for each item: $20$

ITEM$($CD$)$ QUANTITY$(2)$ PRICE$($$$20\mathrm{.}00)$ COST$($$$40\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $1$

Please enter the description: Movie

Please enter the quantity: $4$

Please enter the price for each item: $8$

ITEM$($Movie$)$ QUANTITY$(4)$ PRICE$($$$8\mathrm{.}00)$ COST$($$$32\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $2$

List of all purchases:

ITEM$($Book$)$ QUANTITY$(10)$ PRICE$($$$5\mathrm{.}00)$ COST$($$$50\mathrm{.}00)$

ITEM$($CD$)$ QUANTITY$(2)$ PRICE$($$$20\mathrm{.}00)$ COST$($$$40\mathrm{.}00)$

ITEM$($Movie$)$ QUANTITY$(4)$ PRICE$($$$8\mathrm{.}00)$ COST$($$$32\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $3$

PURCHASES$(3)$ TOTAL$\_$COST$($$$122\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $4$

Are you sure that you want to exit the program $($y$/$n$)?$ y

Thank you for using our program.

Thank you for using my program.

D:$\backslash >$

Sample program run $2$ invalid price and quantity input

D:$\backslash >$BuyItems

Welcome to my shopping program.

Please enter the access code: $54321$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $1$

Please enter the description: Book

Please enter the quantity: $-1$

Invalid quantity. Quantity cannot be negative or string. Please try it again.

Please enter the quantity: $-10$

Invalid quantity. Quantity cannot be negative or string. Please try it again.

Please enter the quantity: Hello

Invalid quantity. Quantity cannot be negative or string. Please try it again.

Please enter the quantity: $10$

Please enter the price for each item: $-1$

Invalid price. Price cannot be negative or string. Please try it again.

Please enter the price for each item: $-10$

Invalid price. Price cannot be negative or string. Please try it again.

Please enter the price for each item: Hello

Invalid price. Price cannot be negative or string. Please try it again.

Please enter the price for each item: $5$

ITEM$($Book$)$ QUANTITY$(10)$ PRICE$($$$5\mathrm{.}00)$ COST$($$$50\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $2$

List of all purchases:

ITEM$($Book$)$ QUANTITY$(10)$ PRICE$($$$5\mathrm{.}00)$ COST$($$$50\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $3$

PURCHASES$(1)$ TOTAL$\_$COST$($$$50\mathrm{.}00)$

Shopping Menu:

$1.$ buy

$2.$ show receipts

$3.$ show summary

$4.$ exit the program

Enter your option: $4$

Are you sure that you want to exit the program $($y$/$n$)?$ y

Thank you for using our program.

Thank you for using my program.

D:$>$

Sample program run $3$ invalid access code

D:$\backslash >$BuyItems

Welcome to my shopping program.

Please enter the access code: $123$

Invalid access code. Please try it again.

P