[Tutor] help with storing money variable

2013-02-19 Thread Ghadir Ghasemi 
Hi guys, Iam halfway through my vending machine program that I started earlier. 
I ran into a problem. When the user inserts some money, The money variable is 
not stored for until the user buys an item. So what happens is when the users 
inserts some coins and then trys to buy an item the money they inserted is not 
stored till they buy item.Can you tell me how this can be overcome, so that 
when the user trys to buy an item,the vending machine correctly looks at the 
amount of money they have and vends the item depending on the amound of money 
they have.  Here is the code:



def printMenu():
print (|__|)
print (|Menu: |)
print (|--|)
print (|  1. Display all Items|)
print (|  2. Insert 10p   |)
print (|  3. Insert 20p   |)
print (|  4. Insert 50p   |)
print (|  5. Insert £1|)
print (|  6. Buy an item  |)
print (|  7. Print Current Amount |)
print (|  8. Exit |)
print (|__|)

while True:
printMenu()
choice = input(enter an option from the menu: )



if choice == '1':
print()
print( A  BC)
print(  1.[ Vimtos ] [ Chewits ] [ Mars Bar ])
print([  50p   ] [  40p] [  50p ])
print()
print(  2.[ Doritos ] [ Mentos ])
print([  60p] [  50p   ])
print()



elif choice == '2':
money = 0
number = int(input(how many 10p: ))
money += number * 1/10
print(your newly updated credit is £ + str(money) + 0)


elif choice == '3':
money = 0
number2  = int(input(how many 20p: ))
money += number2 * 2/10
print(your newly updated credit is £ + str(money) + 0)


elif choice == '4':
money = 0
number3 = int(input(how many 50p: ))
money += number3 * 5/10
print(your newly updated credit is £ + str(money) + 0)


elif choice == '5':
money = 0
number4 = int(input(how many £1: ))
money += number4 * 1
print(your newly updated credit is £ + str(money))



elif choice == '6':
code = input(Enter the code of item you want to buy e.g. for Vimtos = 
a1: )
money = 0
pricea1 = 0.50
pricea2 = 0.60
priceb1 = 0.40
priceb2 = 0.50
pricec1 = 0.50

if code == 'a1':

if money  pricea1:
print(you have bought a packet of Vimtos and your newly updated 
balance is  + str(money - pricea1))
money -= pricea1
else:
print(you can't buy that item as your credit is too low)

if code == 'a2':
if money  pricea2:
print(you have bought a packet of Doritos and your newly updated 
balance is + str(money - pricea2))
money -= pricea2
else:
print(you can't buy that item as your credit is too low)

if code == 'b1':
if money  priceb1:
print(you have bought a packet of Chewits and your newly updated 
balance is + str(money - priceb1))
money -= priceb1
else:
print(you can't buy that item as your credit is too low)

if code == 'b2':
if money  priceb2:
print(you have bought a packet of Mentos and your newly updated 
balance is + str(money - pricea2))
money -= priceb2
else:
print(you can't buy that item as your credit is too low)

if code == 'c1':
if money  pricec1:
print(you have bought a Mars Bar and your newly updated balance 
is + str(money - pricea2))
money -= priceb2
else:
print(you can't buy that item as your credit is too low)
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Re: [Tutor] help with storing money variable

2013-02-19 Thread Dave Angel 

On 02/19/2013 07:36 AM, Ghadir Ghasemi wrote:

Hi guys, Iam halfway through my vending machine program that I started earlier. 
I ran into a problem. When the user inserts some money, The money variable is 
not stored for until the user buys an item. So what happens is when the users 
inserts some coins and then trys to buy an item the money they inserted is not 
stored till they buy item.Can you tell me how this can be overcome, so that 
when the user trys to buy an item,the vending machine correctly looks at the 
amount of money they have and vends the item depending on the amound of money 
they have.  Here is the code:



def printMenu():
 print (|__|)
 print (|Menu: |)
 print (|--|)
 print (|  1. Display all Items|)
 print (|  2. Insert 10p   |)
 print (|  3. Insert 20p   |)
 print (|  4. Insert 50p   |)
 print (|  5. Insert £1|)
 print (|  6. Buy an item  |)
 print (|  7. Print Current Amount |)
 print (|  8. Exit |)
 print (|__|)

while True:
 printMenu()
 choice = input(enter an option from the menu: )



 if choice == '1':
 print()
 print( A  BC)
 print(  1.[ Vimtos ] [ Chewits ] [ Mars Bar ])
 print([  50p   ] [  40p] [  50p ])
 print()
 print(  2.[ Doritos ] [ Mentos ])
 print([  60p] [  50p   ])
 print()



 elif choice == '2':
 money = 0
 number = int(input(how many 10p: ))
 money += number * 1/10
 print(your newly updated credit is £ + str(money) + 0)


 elif choice == '3':
 money = 0
 number2  = int(input(how many 20p: ))
 money += number2 * 2/10
 print(your newly updated credit is £ + str(money) + 0)


 elif choice == '4':
 money = 0
 number3 = int(input(how many 50p: ))
 money += number3 * 5/10
 print(your newly updated credit is £ + str(money) + 0)


 elif choice == '5':
 money = 0
 number4 = int(input(how many £1: ))
 money += number4 * 1
 print(your newly updated credit is £ + str(money))



 elif choice == '6':
 code = input(Enter the code of item you want to buy e.g. for Vimtos = a1: 
)
 money = 0
 pricea1 = 0.50
 pricea2 = 0.60
 priceb1 = 0.40
 priceb2 = 0.50
 pricec1 = 0.50

 if code == 'a1':

 if money  pricea1:
 print(you have bought a packet of Vimtos and your newly updated 
balance is  + str(money - pricea1))
 money -= pricea1
 else:
 print(you can't buy that item as your credit is too low)

 if code == 'a2':
 if money  pricea2:
 print(you have bought a packet of Doritos and your newly updated 
balance is + str(money - pricea2))
 money -= pricea2
 else:
 print(you can't buy that item as your credit is too low)

 if code == 'b1':
 if money  priceb1:
 print(you have bought a packet of Chewits and your newly updated 
balance is + str(money - priceb1))
 money -= priceb1
 else:
 print(you can't buy that item as your credit is too low)

 if code == 'b2':
 if money  priceb2:
 print(you have bought a packet of Mentos and your newly updated 
balance is + str(money - pricea2))
 money -= priceb2
 else:
 print(you can't buy that item as your credit is too low)

 if code == 'c1':
 if money  pricec1:
 print(you have bought a Mars Bar and your newly updated balance 
is + str(money - pricea2))
 money -= priceb2
 else:
 print(you can't buy that item as your credit is too low)


How did you conclude that the money they deposit isn't stored till 
they try to buy something?  Are you really saying it isn't visible to 
the user?  Could it be because you forgot the

elif code == 7

case?  (And the 8 one as well.)

The other problem I see is that many of those choices zero the value 
bound to money.  That should be zeroed before the while loop, not 
inside any place somebody deposits something.



--
DaveA
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Re: [Tutor] help with storing money variable

2013-02-19 Thread Alan Gauld 

On 19/02/13 12:36, Ghadir Ghasemi wrote:


def printMenu():
 print (|__|)
 print (|  2. Insert 10p   |)
 print (|  3. Insert 20p   |)
 print (|  4. Insert 50p   |)
 print (|__|)

while True:
 elif choice == '2':
 money = 0
 number = int(input(how many 10p: ))
 money += number * 1/10
 elif choice == '3':
 money = 0
 number2  = int(input(how many 20p: ))
 money += number2 * 2/10
 elif choice == '4':
 money = 0
 number3 = int(input(how many 50p: ))
 money += number3 * 5/10


In each case you start by zeroing money thus losing any credit they
had built up. If a real machine did that to me I'd me mighty annoyed.

Just a thought...

--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/

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