Design Details

Customer can

1. specify burger type
2. select drink type and size
3. choose side order
4. add other additives
5. offer a coupon
6. cancel last item
7. cancel entire order

If many items are needed they will be ordered one by one even if they are the same. We want to keep the interface simple. You will be writing a program (i.e. logic behind the interface) that will

1. initialize the system with prices of items in an array,
2. initialize any data associted with an order,
3. be listening to the activation of the various controls on the device interface,
4. respond to the signal,
5. update data associated with the order,
6. display needed information (items ordered, price) on the interface.