Question

Python

write a class that takes in two arguments (one for the total cost and one for the amount paid) into a cash register that will give you the most favorable change for an items cost. this class should have a method called most_favorable_change which outputs a string with the most favorable output. must account for singular and plurals (quarters, dimes, pennies, bills). Looking for the least amount of change that is possible.

example:

change_giver = ChangeGiver(62.13, 100)

change_giver.most_favorable_change()

output:

“The least amount of change for an thing that costs $52.13 with an amount paid of $100 is 1 $20 bill, 1 $10 bill, 1 $5 bill, 2 $1 bills, 3 quarters, 1 dime, and 2 pennies.”

Answer 1

class ChangeGiver:
    def __init__(self, cost, paid):
        self.cost = cost
        self.paid = paid

    def most_favorable_change(self):
        change = (self.paid * 100 - self.cost * 100)
        bills = ['$20 bill', '$10 bill', '$5 bill', '$1 bill', 'quarter', 'dime', 'nickel', 'penny']
        values = [2000, 1000, 500, 100, 25, 10, 5, 1]
        result = []
        for i in range(len(values)):
            if change >= values[i]:
                result.append(int(change // values[i]))
                change %= values[i]
            else:
                result.append(0)
        result_string = []
        for i in range(len(result)):
            if result[i] > 0:
                if result[i] == 1:
                    result_string.append("{} {}".format(result[i], bills[i]))
                else:
                    if values[i] == 1:
                        result_string.append("{} pennies".format(result[i]))
                    else:
                        result_string.append("{} {}s".format(result[i], bills[i]))
        answer = "The least amount of change for an thing that costs ${:.2f} with an amount paid of ${} is {}.".format(
            self.cost, self.paid, ', '.join(result_string))
        if ',' in answer:
            index = answer.rindex(',')
            answer = answer[0:index] + ', and' + answer[index+1:]
        print(answer)


change_giver = ChangeGiver(62.13, 100)
change_giver.most_favorable_change()