• CashReg
  • Overview
  • Assumptions
  • Build
  • Test
    • All tests
    • Some tests
  • Run
    • From source
    • From build
  • Publish
    • Windows
      • Windows 10
    • Linux
    • Ubuntu
      • Additional Distros
    • MacOS
  • Usage
    • Run the app
    • Initial Prompt
    • Help
    • Scan
    • Coupon
      • BOGO example
    • Total
    • Exit

This is a sample dotnet core console app. This program simulates a cash register. This was created as an exercise for a Job Interview.

Design and implement a cash register.

The 3 main requirements are:

1. It needs to be able to scan items in by quantity and weight

2. It needs to be able to handle discount coupons… allow for two different types of coupons

   • % off total

   • Buy ‘x’ get ‘y’ free (i.e. buy 3 get 1 free)

3. It should be able to provide a caller with a total cost and a list of items

I assume that user input will more or less follow the expected input, some error and bounds checking are involved but not everything is covered.

I assume that only a single percentage off coupon can be used the latest coupon scanned will be used.

I assume that a single item can only have a single coupon associated to it. Any additional coupons added for the same item replace the old item.

I assume that resonable values will be input.

I assume that item names are a single word without spaces.

I assume that the user will be using the command line.

I assume that you can have both a single percent coupon and multiple BXGY coupons.

I assume that the order of applying discounts matters and all BXGY coupons are applied first and lastly is the percentage coupon.

I assume for BXGY coupons that they apply to multiples of items, e.g. a Buy One Get One on 4 items results in 2 free items.

I assume the same currency is used for all items.

To build run:

cd src
dotnet build

cd tests
dotnet test

cd tests
dotnet test --filter Converter

cd src
dotnet run

dotnet src/bin/Debug/netcoreapp2.0/CashReg.dll
-- for release build --
dotnet src/bin/Release/netcoreapp2.0/CashReg.dll

To publish the project for a particular platform run one of the following.

cd src
dotnet publish -r win10-x86
-- or --
dotnet publish -r win10-x64
-- or ---
dotnet publish -r win10-arm
-- or ---
dotnet publish -r win10-arm64

cd src
dotnet publish -r ubuntu-x64

For publishing to additional linux distros see microsoft.

cd src
dotnet publish -r osx-x64 # netcore2.0 and later
-- or --
dotnet publish -r osx10.10-x64
-- or --
dotnet publish -r osx10.11-x64
-- or --
dotnet publish -r osx10.12-x64 # netcore1.1 and later
-- or --
dotnet publish -r osx10.13-x64

cd src
dotnet run

Welcome to CashReg type "help" to see more info
help, scan, total, coupon, exit ?

Entering "help" writes out to the screen a list of availavle commands.

help, scan, total, coupon, exit ? help
Please use any of [help, scan, total, coupon, exit]
You'll be prompted for additional details if necessary

help, scan, total, coupon, exit ?

Entering "scan" you will be asked to enter more information:

item >

The input to the scan is in the format XX name DD where XX is the quantity or weight of the name item and DD is the value of the of item with per-unit if its a quantity item or per weight measure.

e.g.

item > 1 apple 1.99
Added 1 apple@1.99
...
item > 2.5 orange 0.99
Added 2.5 orange@0.99

Entering "coupon" command brings up the promt:

help, scan, total, coupon, exit ? coupon
coupon >

The format of this line is <coupon_type> ... where coupon_type is either '%' or 'BXGY' (for buy X get Y)

help, scan, total, coupon, exit ? coupon
coupon > BXGY apple 1 1

The "total" command prints all items that have benn scanned into the register.

e.g.

help, scan, total, coupon, exit ? total
CashReg Currrent Total
        2 Unique Items
        1 apple@1.99
        2.5 orange@0.99

SubTotal: 4.465  Discount: 0
Total: 4.465

help, scan, total, coupon, exit ?

Entering "exit" closes the application