CS 1401, Exam #4, 11:30 am version
Date: Friday, November 30, 2007
Name (please type legibly, ideally in block letters):
On this same day in the year 30 B.C.E., the famous Cleopatra died. Her
husbands included pharaohs, Julius Caesar (from 48 to 44),
Marc Anthony (NOT the modern singer :-), and many others.
Let us help historians process the data about her husbands.
1-3. Let us start helping the historians.
- Define a class
HusbandOfCleopatra in which each object has three parameters:
name, the year when the marriage started, and the year when it
ended. Include a constructor method, accessor methods, mutator
methods, a method which computes the duration of the marriage, and
an appropriate toString method.
- In the main method,
define Julius Ceasar as a new object of this class, and compute and
print the period of time during which he was married to Cleopatra
(should be 4 years).
- Trace your code from Problem 2
4. When we defined our class in Problems 1-3, we did not include an
important field: the
social position of the husband. Define a subclass
of the class HusbandOfCleopatra which contains this new field.
In the main method,
define a new object corresponding to Julius Ceasar.
5. Write a method that, given an array of objects of type
HusbandOfCleopatra (defined in Problems
1-3), computes the shortest duration of Cleopatra's marriages.
6. Suppose that the historians already have duration of different Cleopatra's
marriages in a file durations.
are stored line by line:
Write a code that
reads the values line by line, adds them
up, computes the number of lines,
and then computes the average. Use try-catch block to produce the meaningful
error message when we are trying to divide by 0.
- the 1st line contains the duration of Cleopatra's first marriage,
- the 2nd line contains the duration of Cleopatra's second marriage,