HOMEWORK 6: CLASS AND OBJECT
Project naming convention
 Create a project named: pLab06_ClassAndObject_ID
 With ID stands for student’s identify, p is short for project
 Ex: If your student’s ID is 9600278, so your project name will be: pLab06_ClassAndObject_9600278
 Pay attention to “_” (underscore)
Package naming convention: Each project has one or many packages.
 Each package has a specific name
 Each Lab has one package name. Remember to name the packages as follow: labNo_ID
 With No is a number of each lab, ID stands for student’s identify
 Ex: lab01_9600278, lab02_9600278
 Remember to use lowercase l
Class naming convention (Files): Each package has one or many classes
 Each class has a specific name
 Remember to name the classes (classname) as follow: LabNo_ID and TestLabNo_ID
 With No is a number of each lab, ID stands for student’s identify  Ex: Lab01_9600278, TestLab01_9600278, Lab02_9600278, TestLab02_9600278
 Remember to capitalize each word L, T and L
1. Create a class called Fraction to perform arithmetic operations with fractional numbers.
Write a program to test this class:
Use integer values to represent the attributes of the class – the numerator and the denominator.
Create public methods to perform the following:
a. Input a fraction. The result is normalized.
b. Add two fractions. The result is normalized.
c. Subtract two fractions. The result is normalized.
d. Multiply two fractions. The result is normalized.
e. Divide two fractions. The result is normalized.
f. Display a fraction as follows: (A/B). A is the numerator, B is the denominator
g. Display a fraction on the screen as a decimal number.
2. Create a class called Complex to perform arithmetic operations with complex numbers.
Write a program to test this class Complex’s form: + *i
Represent both the real and the imaginary parts using values of type float.
Create public methods to perform the following: a. Input two complexes b. Add two complexes c. Subtract two complexes d. Multiply two complexes e. Divide two complexes
f. Display a complex value as follows: (
A+iB), where A is the real part and B is the imaginary.
Example: Given two complexes: X = a +ib and Y = c +id
Z = X + Y = (a +ib) + (c +id) = (a +c) + i(b +d)
Z = X - Y = (a +ib) - (c +id) = (a -c) + i(b - d)
Z = X * Y = (a +ib) * (c +id) = ac + iad +ibc +i2bd = (ac + bd) + i(ad + bc)
Z = X / Y = (a +ib) / (c +id) = [(a + ib) * (c - id)] / [(c + id) * (c - id)]
= [(ac - bd) + i(bc - ad)] / (c2 - d2 )
3. Using the Fraction class of exercise 1. create the class ArrayOfFractions which provides methods to: a. Input 10 fractions.
b. Find the two fractions which have the greatest sum.
c. Sort the fractions in ascending order.
4. Creating a class called Point that has two fields: the abscissa and the ordinate.
The Point class should include methods that:
a. Constructor to initialize the fields with zero. b. Input a point.
c. Output a point with form (A;B). A is the abscissa and B is the ordinate.
d. Compute the distance between two points
e. Compute the area of a triangle (defined by 3 points).
5. Use the Point class of exercise 4 to create the class ArrayOfPoints which provides methods to: a. Input 10 points
b. Find the largest distance between two points in 10 points.
c. Find a triangle that has largest circumference in 10 points.
6. Create a class called Polynomial that provide methods or fields that: a. Represent: - The order of the polynomial
- The coefficients (stored in an array) b. Input one polynomial
c. Output the polynomial as follows: anxn + an-1xn-1 + … + a2x2 + a1x + a0 . n is
the order of polynomial, an, an-1,…, a1, a0 are coefficients of polynomial. d. Add two polynomials. e. Subtract two polynomials.
f. Compute the value of polynomial when x is given.
7. Create a Candidate class that includes fields:  codeID,  name,  day of birth,  test mark 1,  test mark 2  test mark. Write methods that compute: a. Input the c
odeID, the name, the year of birth, the test mark 1, the test mark
2 and the test mark for a student.
b. Compute the average mark as follow:
i. (((the test mark 1 + the test mark 2)/2) + (the test mark *2))/3 c. Ranks students as follows: Average mark Rank 8-10 Good 7 - <8 Fairly good 5 - <7 Average <5 Fail
8. Use the Candidate class of exercise 7 to create TestCandidate class to execute functions as follow: a. Input 10 candidates
b. How many the candidate pass?.
c. Output the students pass on the screen.