pset6 greedy - python decimal points driving me crazy!

Question

Well, I thought I'd ported the code from c pretty quickly and easily this time, but there is a problem I've been trying to work on for the best part of a week and I don't understand it....and I've tried everything I can find by searching...

I've asked for the 'change' as a float as suggested by the walkthrough (and it has to be anyway, I thought? because it needs to have to 2 dec places...) then I've tried to round it, to get it to no decimal places for the calculations. That didn't work so I changed the input to another var because a debugger I'm using said something about not being able to do calculations using the input function...nada! Then I tried to declare a var as an int and then change the input to that var so that it would be no dec places. That didn't work. So then I added a line to 'cast' the var (that's supposed to be an int to start with - I read that "= 0" makes it an int and '= x.0 makes it a float??!). Anyway, none of it works - I still end up with 2 dec points in the calculations. So then I 'cast' all the vars to ints just to make sure it wasn't coming from anywhere else...! Even that didn't work and I am at a loss...why isn't the 'money' var coming out with no dec points?? I don't feel I can move on and come back to it because without understanding why this is happening I feel I don't understand the basics of python... Any advice gratefully received...thank you!

import cs50

def main():
amt = 0
count = 0
counter = 0
money = 0

#prompt for change and confirm sum is more than 0
while True:
    print("Input amount of change")
    amt = cs50.get_float()
    #convert input to a rounded number of cents ('money')
    money = amt
    int(money)
    money = round(money * 100,0)
    int(count)
    int(counter)


    #if there is money
    while money >= 1:


        #make sure money remains > 24 then count how many 25's in money
        if  money > 24:
            counter = money / 25
            money = money % 25
            count = count + counter
            counter = 0

        # make sure money remains > 9 then count how many 10's in money
        if  money > 9:
            counter = money / 10
            money = money % 10
            count = count + counter
            counter = 0

        # make sure money remains > 4 then count how many 5's in money
        if  money > 4:
            counter = money / 5
            money = money % 5
            count = count + counter
            counter = 0


        # make sure money remains > 0 then count how many 1's in money
        if  money > 0:
            counter = money / 1
            money = money % 1
            count = count + counter
            counter = 0

    if money == 0:
        print(count)
        break




if __name__ == "__main__":
    main()

Answer 1

If you cast to an integer using int(), just like any other operation, you need to assign it to another variable. There's no reason you can't get the amt variable from get_float, and then in one line, multiply it by 100, round it down, cast it to an int and then reassign it to amt.