Question

Java

Write a Fraction class that implements these methods:

•  add ─ This method receives a Fraction parameter and adds the parameter fraction to the calling object fraction.

•  multiply ─ This method receives a Fraction parameter and multiplies the parameter fraction by the calling object fraction.

•  divide ─ This method receives a Fraction parameter and divides the parameter fraction by the calling object fraction.

•  print ─ This method prints the fraction using fraction notation (1/4, 21/14, etc.)

•  printAsDouble ─ This method prints the fraction as a double (0.25, 1.5, etc.)

  In addition, complete the "divide" test in the provided FractionDriver.java. Sample session (your test should demonstrate the divide method as well):

  Enter numerator; then denominator. 5
  8
  5/8

  Enter numerator; then denominator. 4
  10
  4/10

  Sum:
  82/80
  1.025
  Product:
  20/80
  0.25
  Enter numerator; then denominator. 6

  0

infinity

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Code Provided:

-------------------

Fraction Class
public class Fraction
{

  
}

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FractionDriver Class

import java.util.Scanner;

public class FractionDriver
{
public static void main(String[] args)
{
Scanner stdIn = new Scanner(System.in);
Fraction c, d, x, y; // Fraction objects

System.out.println("Enter numerator; then denominator.");
c = new Fraction(stdIn.nextInt(), stdIn.nextInt());
c.print();

System.out.println("Enter numerator; then denominator.");
d = new Fraction(stdIn.nextInt(), stdIn.nextInt());
d.print();

x = new Fraction(); // create a fraction for number 0

System.out.println("Sum:");
x.add(c).add(d);
x.print();
x.printAsDouble();

x = new Fraction(1, 1); // create a fraction for number 1

System.out.println("Product:");
x.multiply(c).multiply(d);
x.print();
x.printAsDouble();

// TODO: write your divide method test here ...

System.out.println("Enter numerator; then denominator.");
x = new Fraction(stdIn.nextInt(), stdIn.nextInt());
x.printAsDouble();
} // end main
} // end FractionDriver class

Answer 1

public class Fraction {

    private int numerator;
    private int denominator;

    public Fraction() {
        this(0, 1);
    }

    public Fraction(int numerator, int denominator) {
        this.numerator = numerator;
        this.denominator = denominator;
    }

    public void print() {
        System.out.println(numerator + "/" + denominator);
    }


    public Fraction add(Fraction fraction) {
        int n = numerator*fraction.denominator+denominator*fraction.numerator;
        int d = denominator*fraction.denominator;

        numerator = n;
        denominator = d;

        return this;
    }

    public Fraction multiply(Fraction fraction) {
        numerator *= fraction.numerator;
        denominator *= fraction.denominator;

        return this;
    }

    public void printAsDouble() {
        System.out.println(numerator/(double)denominator);
    }
}