Country class Exercise

Name:  ______________________________________________________________________

Write a class to create Country objects.

Each Country object should know
	its name
	area (in square miles)
	population

Each Country should be able to
	set population
	get density (number of people per square mile)
	adjust population by some amount 
	provide its name, area, and population (toString)

Write the class then provide a main() that creates
at least two objects and uses the methods.