Week 0 Assignment

All problems should be implemented as individual functions, and so only a single file will be 
submitted.  Your main() should test each function to make sure they work, with appropriate output 
to let me know which function is being tested, as well as the expected
output.  If you prefer to use a header file to hold the functions,
that is also acceptable, in which case you will submit both the header
and the driver.

(15 Points) Chapter 2, Programming Project 12.

(10 Points) Chapter 2, Programming Project 11 (read problem 10 for a full description).

(10 Points) Chapter 3, Programming Project 1. (use a sentinel value to exit the loop).

(15 Points each) Chapter 3, Programming Projects 10, 11, 12 (ignore the part about as often as the user likes)

(10 Points each) EC. Chapter 3, Programming Projects 5, 6, 7, 13.