/*
This tutorial is to give you practice in writing class hierarchies
and using traits classes.

Consider that you are at a very different university from the one you are now,
in which the following statements are true:

	1.	There are people and pandas on campus enrolled as students.
	2.	People and pandas are both mammals
	3.	There are also tutors and professors.
	4.	Professors don't teach: they delegate teaching to another mammal.
	5.	Pandas can't teach.

	Write a CLASS HIERARCHY for objects of type

		mammal
		person
		panda

	Write a templated TRAITS structure called teach_traits that will contain
	information about whether each kind of object can teach.
	Specialise each traits structure according to the class and the role that
	each individual has.

	Write a method in the base class that returns a boolean true value iff
	the individual can teach:
	  bool canTeach();

	This method must use template arguments to determine the function called
	for each object at compile time, NOT at run time.

	Write a method or methods defined for each "kind of person" (panda, person,
	tutor, professor) that prints out a message to say what they are teaching
	or whether they are delegating teaching to something else.

 *
 */