My task is :A food vending machine accepts 10p, 20p, 50p and £1 coins. One or
more coins are inserted and the current credit is calculated and displayed. A
product is selected from those available. The system checks to see if there is
enough credit to purchase the product chosen. If there is not enough credit the
system displays an error message. If there is enough credit it dispenses the
product, updates the credit available and displays the remaining credit.
Further selections can be made if there is enough credit. The vending machine
simulation should have five products and prices. Design, code, test and
evaluate a program for this simulation.
I have designed the following code, but would like to know how to make it more
efficient without making it too complex as I am a beginner or is this fine?
Also, how do I add a loop to this so that once one product has been dispensed
the program asks the user if they would like to continue and purchase another
product?
Code:
print "Welcome to Snack Attack"
snack1 = 0.40snack2 = 0.75snack3 = 1.20snack4 = 0.99snack5 = 0.50insert = 0
change = 0currentCredit = 0.00A = 0.10B = 0.20C = 0.50D = 1.00a = 0.10b = 0.20c
= 0.50d = 1.00
print "Menu"print "Snack 1: Snickers - £0.40"print "Snack 2: Doritos - £0.75
"print "Snack 3: J20 - £1.20"print "Snack 4: Oreos - £0.99"print "Snack 5:
M&M's - £0.50" print "Exit?" - how do I make this a Boolean
expression, so the user can respond with either yes or no?
choice = input("Select your snack: ")
if choice==1: print " " print "You have selected Snickers, which cost £0.40"
print "Please insert £0.40" while currentCredit < snack1: print "Please
select which of these coins to insert; A:10p,B:20p,C:50p and D:£1"
insert_coins = input("Insert coins: ") currentCredit = insert_coins +
currentCredit print "Your current credit is £",currentCredit else:
change_given=currentCredit-snack1 print " " print "Your change is
£",change_given print "Your Snickers have been dispensed...Enjoy!"
elif choice==2: print "You have selected Doritos, which cost £0.75"
print "Please insert £0.75" while currentCredit<snack2: print "Please
select which of these coins to insert; A:10p,B:20p,C:50p and D:£1"
insert_coins = input("Enter coins: ") currentCredit = insert_coins +
currentCredit print "Your current credit is £",currentCredit else:
change_given=currentCredit-snack2 print " " print "Your change is
£",change_given print "Your Doritos have been dispensed...Enjoy!"
elif choice==3: print "You have selected J20, which costs £1.20" print
"Please insert £1.20" while currentCredit<snack3: print "Please select
which of these coins to insert; A:10p,B:20p,C:50p and D:£1" insert_coins =
input("Enter coins: ") currentCredit = insert_coins + currentCredit
print "Your current credit is £",currentCredit else:
change_given=currentCredit-snack3 print " " print "Your change is
£",change_given print "Your J2O has been dispensed...Enjoy!"
elif choice==4: print "You have selcetd Oreos, which cost £0.99" print
"Please insert £0.99" while currentCredit<snack4: print "Please select
which of these coins to insert; A:10p,B:20p,C:50p and D:£1" insert_coins =
input("Enter coins: ") currentCredit = insert_coins + currentCredit
print "Your current credit is £",currentCredit else:
change_given=currentCredit-snack4 print " " print "Your change is
£",change_given print "Your Oreos have been dispensed...Enjoy!"
elif choice==5: print "You have selected M&M's, which cost £0.50" print
"Please insert £0.50" while currentCredit<snack5: print "Please select
which of these coins to insert; A:10p,B:20p,C:50p and D:£1" insert_coins =
input("Enter coins: ") currentCredit = insert_coins + currentCredit
print "Your current credit is £",currentCredit else:
change_given=currentCredit-snack5 print " " print "Your change is
£",change_given print "Your M&M's have been dispensed...Enjoy!"
elif choice=="Exit": print "Thank You and Have a Nice Day" else: print
" " print "Invalid choice"
Thanks,Saba
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