Groupsave ticket calculator

Conditionals and Loops example from a Well House Consultants training course
More on Conditionals and Loops [link]

This example is described in the following article(s):
• Groupsave tickets - 3 or 4 train tickets for the price of 2 - [link]

Source code: groupsave Module: Y103

""" On a Groupsave 3 ticket, 3 adults could travel for the price of 2,
and on a Groupsave 4, 4 adults could travel for the price of two. On
Groupsave, children could travel for a pound each.

----------------------------------------------------------------------
*** NOTE - rules have now changed. Straight 34% off adult tickets
and no discount in chld tickets. Minimum group size 3. Please note
program is a training execise using the old rules ***
----------------------------------------------------------------------

With regular (non groupsave) tickets, chldren travel at half fare.

Here is a program which applies the pricing algorithms to let you
work out what you should buy in terms of tickets if you're taking a
group. It's a programming example from a course, so it's "errors
and ommission excepted" - in other words, it's not the authortative
specification! """

fare = float(input("How much does an adult fare cost? "))
adults = int(input("How many adults are travelling? "))
children = int(input("How many kids with them? "))

# Let's deal with each differently priced scenario

if adults < 3:
        ad_price = fare * adults
        kid_price = fare / 2.0 * children
elif adults == 3:
        ad_price = fare * 2
        kid_price = 1.0 * children
else:
        number_groups = adults / 4
        left_overs = adults % 4
        if left_overs == 3:
                left_overs = 0
                number_groups = number_groups + 1
        ad_price = fare * 2 * number_groups + left_overs * fare
        kid_price = 1.0 * children

# Whichever scenario it was, we now have set up ad_price and kid_price
# to give us the pricing for adults and children

tot_price = ad_price + kid_price

print ("{} {}".format("Adult fares - ",ad_price))
print ("{} {}".format("Child fares - ",kid_price))
print ("{} {}".format("Total fares - ",tot_price))

""" Sample Output

WomanWithCat:y103 grahamellis$ python2 groupsave
How much does an adult fare cost? 17.80
How many adults are travelling? 4
How many kids with them? 2
Adult fares - 35.6
Child fares - 2.0
Total fares - 37.6
WomanWithCat:y103 grahamellis$ python3 groupsave
How much does an adult fare cost? 17.89
How many adults are travelling? 4
How many kids with them? 2
Adult fares - 35.78
Child fares - 2.0
Total fares - 37.78
WomanWithCat:y103 grahamellis$

"""

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