CS 111 - Introduction to Computer Science Homework #4

1. Definitions:  In your own words, define the following terms:

• class
• object
• method
• constructor
• instance variable (a.k.a. field)

2. Date:  Exercise 3.15.  Submit both Date.java and DateTest.java.

3. Circle: Create a class Circle with

• a constructor that takes a radius,
• getRadius and setRadius methods,
• a getArea method, and
• a getCircumference method.

• The test program should only be calling Circle methods.  It should not be performing computations.
• Since two different Circle objects should be created, you should be using new twice in your test code.
• Area and circumference computations should take place only in the Circle class using only the object's radius field.

4. Student: Create a class Student with

• a constructor that takes a String name,
• a getName method that returns the Student name,
• an addQuiz method that allows an int quiz score to be added to the student's quiz total,
• a getQuizTotal method that returns the total int score of all quizzes that have been added, and
• a getQuizAverage method that returns the average double quiz score so far.  Hint: You'll need to keep track of how many quizzes have been added.

• has the user input a name,
• constructs a Student object,
• has the user enter three int quiz scores, adding each separately to the Student object using the addQuiz(int) method, and
• prints "Student <name> has a total score of <quiz total> and an average score of <quiz average>."

Note:

• The constructor should only take name information. 
• Quiz scores are only added to the Student object through the addQuiz method.
• User input is only read within the StudentTest main method.
• Your Student implementation will be tested with a different number of calls to addQuiz.  You should not need to know how many in advance if Student is implemented correctly.