1) Void means that the function doesn't return a value.  The sort() function
   is sorting the array passed to it.  Because it is an *array* that is
   being passed, all changes to the array do show up in the calling
   function.

2) 
 a)  It sums the first "num" elements of "list[]" other than the N lowest
     scores, where N is specified by "drop".
 
 b)  It uses sort to figure out which are the lowest scores (and thus
     drop from the sum)

 c)  72.  (5 is ignored because only the first 4 elements are summed.  The 
     1 is ignored because it gets dropped)
 

3) ((30+25)/60)*4=(55/60)*4=3.6667

4) ((90+20+133.33)/333.33)*50=36.5  

5) (160/200)*5=4.0 (3.75 if the sort isn't fixed)

6) 
 a) Which project is which is determined by order.  Sorting would mess that
    up
 b) sort(), sumList(), contrib() all would cause the list to be sorted.

7) There are two big ones.  First of all, the function "examValue()" exists
   but is never used.  Secondly, the comments really could use a LOT of
   help.  There are lots of minor issues.

8) 
 a) assert() causes the program to exit if the statement in the assert is
    false.  
 b)
    assert(WEIGHT_EXAM+WEIGHT_HW+WEIGHT_INLAB+WEIGHT_PROJECT+WEIGHT+PRACTICAL+
        WEIGHT_QUIZ==100)
    The best place to put this is probably at the start of the main after
    all the variables have been declared.
  
9) Since sumList() sorts the data, the best score must be in
   courseGrades.exam[2].  So 
       best= courseGrades.exam[2]; 
   would be a replacement for the line that currently computes "best".

10) It is checking to see if the file which was opened as "scoreFile" failed
    to open.