This project is intended to accomplish the following:

• Learn to develop a basic data class (fraction number)
• Develop habit of testing each method in the class as soon as it is written
• Follow the "Start small. Do one thing at a time. Test it. Continue." paradigm

Other tasks for this project include...

1. Create a special exception class (throwing exception)
2. Methods
   • GCD (greatest common divisor)
   • toString & toDouble
   • Math, test, and exam methods
3. Add data fields (class invariants)
4. Add constructors
   • full service c-tor
   • one argument c-tor
   • zero arg/default c-tor
5. Testing (as soon as you add any method to the class, you want to TEST IT!!!!!)