Boss: Opening Morning

Phase 1: The first customer

Boss rules. One file, till.py. Receipts must match exactly, space for space. From Phase 2 on, the check serves customers you can't see and tells you how many receipts came out right, and what the first wrong one looked like. The hint nudges; it won't write the till for you.

The till. Prices are kept in whole pennies, the way tills keep money exact: FLAT_WHITE = 320 means £3.20. Your till asks three questions, in this order: the name, how many flat whites, how many croissants. Then it prints the receipt. For Sam, two flat whites and one croissant:

Bean There, receipt for Sam
2 x Flat white        £6.40
1 x Croissant         £2.45
Total                 £8.85
Thank you, see you tomorrow!

What you need from Level 1:

• input("Name: ") asks a question and gives back what was typed, always as text. int(input("Flat whites: ")) turns the answer into a whole number.
• Work out each amount in pennies (quantity times price) and turn pennies into pounds only when you print: f"£{pennies // 100}.{pennies % 100:02d}". The :02d keeps the zero in £3.05.
• The middle lines line up: the description padded to 20 characters on the left, then the amount right-aligned in 7. In an f-string: f"{description:<20}{amount:>7}".

Press Run to play Sam at the till: customer.py types Sam's three answers for you. To serve someone yourself, type python3 till.py in the terminal and answer the questions. Press Check when the receipt matches. The check serves Sam and one more customer.

# Bean There's till. Prices are in whole pennies: 320 means £3.20.
FLAT_WHITE = 320
CROISSANT = 245

# Your till: ask for the customer's name, how many flat whites and how many croissants,
# then print their receipt. The brief on the right shows it exactly.

provided for you:customer.py

Phase 2: The morning crowd

8:15. The queue is out of the door, and customers type their own names on the order screen: priya shah, ALEX KIM, jo. Sam wants every receipt to show the name tidy, with a capital at the start of each word and no stray spaces:

Bean There, receipt for Priya Shah
3 x Flat white        £9.60
2 x Croissant         £4.90
Total                £14.50
Thank you, see you tomorrow!

The check now serves five customers you can't see. Some type numbers with spaces around them, some order a lot, some order nothing of one item. It tells you how many receipts came out right, and shows the first wrong one: what the customer typed, what your till printed and what it should have printed.

till.py starts from Phase 1's till. Press Run to serve Priya, then Check to face the crowd.

# Bean There's till. Prices are in whole pennies: 320 means £3.20.
FLAT_WHITE = 320
CROISSANT = 245

name = input("Name: ")
flat_whites = int(input("Flat whites: "))
croissants = int(input("Croissants: "))

flat_white_pennies = flat_whites * FLAT_WHITE
croissant_pennies = croissants * CROISSANT
total_pennies = flat_white_pennies + croissant_pennies

flat_white_line = f"{flat_whites} x Flat white"
croissant_line = f"{croissants} x Croissant"
flat_white_amount = f"£{flat_white_pennies // 100}.{flat_white_pennies % 100:02d}"
croissant_amount = f"£{croissant_pennies // 100}.{croissant_pennies % 100:02d}"
total_amount = f"£{total_pennies // 100}.{total_pennies % 100:02d}"

print(f"Bean There, receipt for {name}")
print(f"{flat_white_line:<20}{flat_white_amount:>7}")
print(f"{croissant_line:<20}{croissant_amount:>7}")
print(f"{'Total':<20}{total_amount:>7}")
print("Thank you, see you tomorrow!")

provided for you:customer.py