Question

Pyhton Program : Write a coffee vending machine class. Include fields giving the number of cups of coffee available, the cost of one cup of coffee, and the total amount of money inserted by the user. This machine requires exact change. Include one constructor which stocks the machine with a quantity and price of coffee specified as parameters. Include the following methods; menu() // display the quantity and price of coffee insert(int quarters, int dimes, int nickels) // insert the given amount select() // dispenses a cup of coffee if user has inserted enough // money and coffee is available, otherwise displays a message refund() // returns the money inserted Write the main() program to create some vending machines and test their operation thoroughly.

Answer 1

Hi,

Please find sample python code below:

###############

import math

class VendingMachine:
    def __init__(self,cups,cost):
        self.noOfCups = cups
        self.costPerCup = cost
        self.totalAmountInserted = 0
  
    def get_cups(self):
        return self.noOfCups
      
    def set_cups(self, cups):
        self.noOfCups = cups
      
    def get_cost_per_cup(self):
        return self.costPerCup
      
    def set_cost_per_cup(self, cost):
        self.costPerCup = cost
      
    def get_total_amount_inserted(self):
        return self.totalAmountInserted
      
    def set_total_amount_inserted(self, amount):
        self.totalAmountInserted = amount
      
    def menu(self):
        print("########Coffee Menu############")       
        print("Quantity:=", self.noOfCups, "\nPrice of coffee:= $",self.costPerCup/100)       
        print("-------------------------------")       

    def insert(self, quarters, dimes, nickels):
        print("Inserted:\nQuarters:=",quarters,"\nDimes:=",dimes,"\nNickels:=",nickels)       
        self.totalAmountInserted= quarters*25 + dimes*10 + nickels*1
  
    def refund(self):
        quarters = math.floor(self.totalAmountInserted/25)
        dimes= math.floor((self.totalAmountInserted - quarters*25 )/10)
        nickels = (self.totalAmountInserted - quarters*25 - dimes*10)   
        if(quarters > 0 or dimes > 0 or nickels > 0):
            print("Refund Money: \nQuarters:=", int(quarters), "\nDimes:=",int(dimes), "\nNickels=",int(nickels))       

  
    def select(self):
        if(self.noOfCups > 0):
          
            if(self.totalAmountInserted/self.costPerCup >= 1):
                self.noOfCups=self.noOfCups-1
                print("One cup of coffee issued..")       
                self.totalAmountInserted = self.totalAmountInserted - self.costPerCup
                self.refund()
            else:
                self.refund()
              
        else:
            print("No coffee stock...")       
      
## Testing code      
machineOne = VendingMachine(10,75)
machineOne.menu()
machineOne.insert(5,0,5)
machineOne.select()
machineOne.menu()

#################################

sample output

########Coffee Menu############
Quantity:= 10
Price of coffee:= $ 0.75
-------------------------------
Inserted:
Quarters:= 5
Dimes:= 0
Nickels:= 5
One cup of coffee issued..
Refund Money:
Quarters:= 2
Dimes:= 0
Nickels= 5
########Coffee Menu############
Quantity:= 9
Price of coffee:= $ 0.75
-------------------------------

Hope this helps.
Thanks.