Question

1. Implement a class to represent a cash register. At the start of each transaction, the amount due from the customer is $0.00. As items are scanned, the amount due increases. The cash register should be able to report the current amount due at any time. Your class should implement the following methods:

               startTransaction(self) Sets the current transaction total to 0.00.

               addItem(self, amount) Adds the given amount to the total.

                                   

               total(self) Returns the total amount due so far.

Provide test cases by writing code to simulate three transactions with items of varying amounts.

Python

Answer 1

Code:

class cash_register:

   

               def __init__(self):          #define construtor

                              self.totall = 0.00

                             

               def startTransaction(self): #Sets the current transaction total to 0.00

                              self.totall = 0.00

               def addItem(self, amount):   #Adds the given amount to the total.

                              self.totall += amount

               def total(self):           #Returns the total amount due so far.

                              return (self.totall)

                             

b = cash_register()

b.startTransaction()

b.addItem(10.6)

b.addItem(5.7)

b.addItem(4.0)

b.addItem(10)

a = b.total()

print(a)

b.startTransaction()

b.addItem(4.7)

b.addItem(45.0)

b.addItem(76.9)

a = b.total()

print(a)

b.startTransaction()

b.addItem(45.0)

b.addItem(56.9)

a = b.total()

print(a)

Output: