The common algorithm for calculating the roots of a quadratic equation by the quadratic formula requires considering several special cases in your code. Write appropriate comments for this algorithm so that the comments make it easy to see the different cases and how they are handled. Write accompanying external documentation to explain this algorithm.

You are asked to write a program to print out a yearly calendar. The user enters the year desired, and the output is a calendar for that year.

Discuss how the representation of internal data will affect the way in which the program is written. Give several examples of data structures that might be used in such a problem. (Hint: Are your data structures cumulative or not? How is a leap year handled?)