CSE2305
Object-Oriented Software Engineering

Exercise 5: Testing and Debugging: solution

You were asked to use metrics and profiles to analyse and improve the Rational class.

You can download a solution, including some tests.

Some things to think about:

• What about error handling, e.g. Rational a; a.setDenominator(0); a.asDouble();

• Why does operator= return a Rational& rather than Rational or const Rational& ?
  
• Why do operator- and operator+ return a Rational?
  
• Why is operator<< a friend (rather than a normal member) ?