Question

I'm thinking about writing a program for a supermarket.
When I looking in a recipe I see everthing is imposible,please can someone give me an idea to get starting?

Answer 1

What type of program? What is it supposed to run on? Much of programming is planning. You need to develop the plan first!

Answer 2

Break the problem down into smaller problems, then break them down into smaller problems and keep on doing that until it looks possible, and then break them down until you're writing small, say 15 or less, lines of code for each of the sub-sub-sub-subproblems.

Answer 3

Can someone gime me an idea about this problem,I would like to use a loop to deal with this program.
def grocery():
product = raw_input("enter the product: ")
qty = int(raw_input("enter the qty: "))
inventory = {"banana": 2.25, "pears":2.35, "oranges": 1.75}
usr = inventory[product]
price = qty * usr
product = raw_input("enter the product: ")
qty = int(raw_input("enter the qty: "))
usr = inventory[product]
price = qty * usr
usr = raw_input("enter the product: ")
qty = int(raw_input("enter the qty: "))
product = inventory[product]
price = qty * product
total = price + price + price
print total

Answer 4

Each time you assign to price, you overwrite it's previous value. Your total will equal the last price * 3.

If you want to use a loop, there are basically two types: a while loop or a for loop. for loops are basically for counting through a number of iterations. while loops basically continue until it's condition becomes false:

while( groceryBagIsFull == False ):
# add stuff

for i in xrange( 0, 10, 1 ):
# will count from 0 to 9