CECS 277
LAB ASSIGNMENT #1
Assigned date: Wed 1/20
Due date: Wed 1/27
10 points

Objectives

• Be familar with classes and objects
• Create a class and objects to implement Rational arithmetic operations.

Prelab

• Read chapter 8 - Classes and objects
• Read the javadoc note posted on the class website

Problem

Create a class called Fraction for performing arithmetic operations with fractions. The class Fraction must have the following data members, contructors and methods:

• Data members:
  private
  int numerator
  int denominator
• Constructors
  Default-argument constructor
  Two-argument constructor to initialize numerator and denominator
• Accessors (Getters)
  public int getNumerator() - return the numerator
  public int getDenominator() - return the denominator
• Modifiers (Setters)
  public void setNumberator(int value) - set the numerator to value
  public void setDenominator(int value) - set the denominator to value
• public inputFraction()
  Input the numerator and the denominator from the keyboard
• public String toString()
  return a string  in the form numerator/denominator
• private int gcd(int  m, int n) - return the greatest common divisor
  int r;
  while(n != 0)
  { r = m % n;
    m = n;
   n = r;
  }
  return m;
• Add two Fraction numbers
  public Fraction  add(Fraction f)
• Subtract two Fraction numbers
  pubic void sub(Fraction, f1, Fraction f2)
• Multiply two Fraction numbers
  public Fraction mul(Fraction f)
• Divide two Fraction Numbers
  public void div(Fraction f1,Fraction f2)
• Return the real value of Fraction f1 divided by Fraction f2
  public static double divFraction(Fraction f1,Fraction f2)

Write a main method to testthe class Fraction. All the Fraction objects should must be reduced by using the greatest common denominator.

1. Input Fraction object  F1
2. Input Fraction object F2
3. Add the Fraction objects F1 and F2 and store the result in the Fraction object F3. Display the result in the following format:
   numerator/demoninator + numberator/denominator =  numberator/denominator.
4. Subtract the Fraction object F2 from the Fraction object F1 and store the result in the Fraction object F3. Display the result in the following format:
   numerator/demoninator - numberator/denominator =  numberator/denominator.
5. Multiply the Fraction object F1 with the Fraction object F2 and store the result in the object F3. Display the result in the following format:
   numerator/demoninator * numberator/denominator =  numberator/denominator.
   
6. Divide the Fraction object F1by the Fraction object F2 and store the result in the object F3. Display the result in the following format:
   numerator/demoninator / numberator/denominator =  numberator/denominator.
7. Display the result of dividing the object F1 by the object F2 in a real number.
8. Change the numerator of object F1 to 2
9. Change the denominator of object F2 to 5
10. Display the numerator of F1 and the denominator of F2 in the following format:
    Numerator: ______
    Denominator: _____
    
    

Grading requirements

• A hard copy of your source code, and runtime output.
• Document your program with Javadoc and other comments
• Demonstrate the result to the instructor
• Submit the lab to the Beachboard.