Subject: Function warnings for this week's lab

(This message is being sent to all CPSC 101 section 302 students)

(1) if codelab says a function "returns nothing" that means
it doesn't return any value to its caller and the type of the
function should be void as in:

    void printGrade(char grade)

(2) a common malfunction of the mental model
when dealing with functions is thinking that functions
must read something using scanf() even when
the instructions don't say to do that.

Consider the sum() function described it class.
Its mission is to add its parameters.. It
would be WRONG for it to try to read data with
scanf()!!

In the printGrade() problem the grade is PASSED INTO your
function in the parameter grade just like the summands are passed
into sum() in a and b.  Trying to read a grade value
in with scanf() is a fatal error.  You should simply
print the value passed in using the "%c" format code.