from cs50 import get_float

def main():
    num = get_float("Cash owed")
    changecalc(num)
def changecalc(num):
    dollars = 0
    quarters = 0
    dimes = 0
    nickels = 0
    pennies = 0
    total = 0
    #num = get_float("Cash owed")
    rnum = round(num)
    while rnum < 0:
        if rnum\25 >= 0:
            quarters = rnum/25
            rnum %= 25
        if rnum\10 >= 0:
            dimes = rnum/10
            rnum %= 10
        if rnum\5 >= 0:
            nickels = rnum/5
            rnum %= 5
        if rnum\1 >= 0:
            pennies = rnum/1
            rnum %= 1
        if rf < 0:
            print("Please enter a positive number:")
        total = dimes + pennies + nickels + quarters
    return total
main()