Lab #7: Programming in Python II

In this lab you will be creating a very simple pizza-ordering menu.
At this pizzeria, there is only one kind of pizza you can order:
regular (cheese) with no toppings.  Your choices are what size of
pizza, and how many of them.  Your program will need to figure out the
total price of the order.  A small pizza costs $7.99, a medium $14.99,
and a large $18.99.

The program will begin by printing "Let me help you order a pizza.
Here are the choices: (a) small $7.99; (b) medium $14.99; (c) large
$18.99.  Please enter a or b or c:".  

Then the user will type "a" or "b" or "c" (followed by the <enter>
key).  For example, suppose the user types "b" <enter>.  Then the
program will print "Ok, medium, that is $14.99 each."

Then the program will print "Ok, medium, that is $14.99 each.
How many would you like?"

Then the user will type a number (followed by the <enter> key).  For
example, suppose the user types "2" <enter>.  

Then the program will print "Your total is $29.98.  Press <enter> to
exit."

Then the user will type the <enter> key, and the program will halt.

Programming the assignment:

Start up the IDLE GUI just like you did for lab 5.  In this lab,
you will be using the raw_input function to get the response to each
question, and to put up the final "Press enter to exit" message.

There is more than one way to write this program, so we won't give you
step-by-step instructions.  Here are some general hints:

  You will need at least two variables, one to keep track of the size
  of pizza, and another to keep track of number of pizzas.

  You will probably want to use some sort of if-elif-else logic to
  decide what the price is, based on the size of pizza ordered.

  The raw_input function returns a string, and you need a number (of
  pizzas.)
 

Turning in your program: Use my.ucdavis.edu to handin the program.
The program name should be named pizza.py. You do not need to handin a
hard copy.