CMIS 241
Homework Due: 26 June

Using the posted Date.java, Person.java, PersonalInfo.java and
PersInfoDriver.java add these methods:

to Date: 
1. copy constructor
2. a constructor with String parameter with date information in mm-dd-yyyy format
3. increment the date.  Make sure the month rolls over if incrementing
the last day of the month, and make sure the year rolls over too if
incrementing December 31, and make sure February is correct for the
year.  Remember the rule for leap years:
A year is a leap year if it is divisible by 4, unless it is divisible
by 100 (in which case it's not a leap year) UNLESS it's also divisible
by 400 (in which case it's a leap year):
 year%4==0 && year%100!=0 || year%400==0 
(1900 was not a leap year, but 2000 is, 2100 will not be).

to Person:
1. copy constructor

to PersonalInfo:
1. copy constructor that makes a (deep) copy of the parameter's Person
  and Data objects.
2. constructor with Person, Date and int parameters.  shallow copy of the
object parameters.
3. equals method.  Two PersonalInfo objects are equal if their ID
fields and birthdates are equal.

Some of these might require some other method(s) to be added to other classes.


Uncomment the sections of PersonalInfoDriver to test your additions.
Do not make any other changes to PersonalInfoDriver as your
instructor will use the posted version to test your modified classes.

Zip the 3 Java files together and attach the zip file.


I recommend this order of doing the stuff:
1. the string constructor for ease of input
2. copy constructor
3. equals
4. increment (this is an exercise in coding logic)