Grading Guidelines for hw3

==============================================================
Problem 1: 50 points

Note: The sample solution keeps separate totals for cheesesteaks, hoagies, 
etc., so if 2 cheesesteaks were chosen, and then 3 cheesesteaks were chosen, 
the total cost would be 3 times the cost of a cheesesteak.  This is not 
required, and it's okay to do it either like that or in the more 
straightforward way, so that the total would be 5 times the cost of a c
heesesteak.

-5 if #define wasn't used to define the cost of each item
-10 if the user is not prompted to reinter a menu item if an invalid choice
is entered.

-5 if doesn't handle both upper and lower case (test with 'B' and 'b'
for banana

-5 if it doesn't handle inputs like 'soda' (ie, should only care about
the first character, not the rest - if they went ahead and actually
checked for strings like 'soda' instead of, e.g., 'soad', that's okay)

-20 if the user is not prompted for more money if not enough is entered.
-10 if this is not done repeatedly, if not enough money is not entered - 
e.g., on the sample run on the hw:

==============================================================
Problem 2: 25 points

only check for the use of switch instead of cascaded if - everything else
should be the same, so if anything else is wrong, it should have been been
taken off for problem 1.  Even if the if statement from problem 1
had something wrong, if the switch statement in problem 2 is an
accurate version of that incorrect if statement, it gets full
credit.

==============================================================
Problem 3: 25 points

-25 if an enumerated type for the items was not used.

-10 if they faked CHEESESTEAK=1 by using some bogus value for 0 - e.g.
typedef enum { FAKE,CHEESESTEAK,TURKEY_HOAGIE....
instead of
typedef enum {CHEESESTEAK=1, TURKEY_HOAGIE...

-10 if the enumerated type was not used in an appropriate spot in 
the code - e.g., "case 1" or "if (item==1)" instead of
"case CHEESESTEAK" or "if (item==CHEESESTEAK)"

-10 if the input is still done with characters ('C',etc.) instead of numbers.

don't grade the total-payment-change loop at the end, since that should
be no different in this problem than the first two.