The objective of this project is to help you understand passing objects as parameters.
/** <<< CODE NOT COMPLETE >>>
* Constructs a fraction with a numerator and a denominator
*/
public class Rational
{
private int numerator;
private int denominator;
/**
* constructs fraction with specified numerator
* and denominator.
*/
Rational(int num, int den) {
numerator = num;
denominator = den;
reduce(); // reduces fraction to lowest terms
}
/**
* returns numerator
*/
public int getNumerator() {
return numerator;
}
/**
* returns denominator
*/
public int getDenominator() {
return denominator;
}
/** <<< CODE NOT COMPLETE >>>
* Returns a new Rational which is the sum of
* this + r reduced to lowest terms
*/
public Rational add(Rational r) {
<<< complete the code >>>
}
/** <<< CODE NOT COMPLETE >>>
* Returns a new Rational which is the difference of
* this - r reduced to lowest terms
*/
public Rational subtract(Rational r) {
<<< complete the code >>>
}
/** <<< CODE NOT COMPLETE >>>
* Returns a new Rational which is the product of
* this * r reduced to lowest terms
*/
public Rational multiply(Rational r) {
<<< complete the code >>>
}
/** <<< CODE NOT COMPLETE >>>
* Returns a new Rational which is the quotient of
* this / r reduced to lowest terms
*/
public Rational divide(Rational r) {
<<< complete the code >>>
}
/** <<< CODE NOT COMPLETE >>>
* Reduces fraction to lowest terms
* and ensures denominatio > 0
*/
private void reduce() {
<<< complete the code >>>
}
/** <<< CODE NOT COMPLETE >>>
* Returns fraction written as a String
*/
public String toString() {
<<< complete the code >>>
}
/**
* Add other methods below if needed
*/
}
/**********************************************************
<<< This code is complete >>>
results from add, subtract, multiple, divide
add
1/4 + 1/4 = 1/2
2/3 + 1/4 = 11/12
1/4 + -4/3 = -13/12
-4/3 + 23/24 = -3/8
subtract
1/4 - 1/4 = 0/16
2/3 - 1/4 = 5/12
1/4 - -4/3 = 19/12
-4/3 - 23/24 = -55/24
multiply
1/4 x 1/4 = 1/16
2/3 x 1/4 = 1/6
1/4 x -4/3 = -1/3
-4/3 x 23/24 = -23/18
divide
1/4 / 1/4 = 1/1
2/3 / 1/4 = 8/3
1/4 / -4/3 = -3/16
-4/3 / 23/24 = -32/23
*****************************************************/
public class RationalTester
{
public static void main(String[] args)
{
Rational r1 = new Rational(4,6);
Rational r2 = new Rational(1,4);
Rational r3 = new Rational(-8,6);
Rational r4 = new Rational(23,24);
System.out.println("\n add");
System.out.println(r2 + " + " + r2 + " = " + r2.add(r2));
System.out.println(r1 + " + " + r2 + " = " + r1.add(r2));
System.out.println(r2 + " + " + r3 + " = " + r2.add(r3));
System.out.println(r3 + " + " + r4 + " = " + r3.add(r4));
System.out.println("\n subtract");
System.out.println(r2 + " - " + r2 + " = " + r2.subtract(r2));
System.out.println(r1 + " - " + r2 + " = " + r1.subtract(r2));
System.out.println(r2 + " - " + r3 + " = " + r2.subtract(r3));
System.out.println(r3 + " - " + r4 + " = " + r3.subtract(r4));
System.out.println("\n multiply");
System.out.println(r2 + " x " + r2 + " = " + r2.multiply(r2));
System.out.println(r1 + " x " + r2 + " = " + r1.multiply(r2));
System.out.println(r2 + " x " + r3 + " = " + r2.multiply(r3));
System.out.println(r3 + " x " + r4 + " = " + r3.multiply(r4));
System.out.println("\n divide");
System.out.println(r2 + " / " + r2 + " = " + r2.divide(r2));
System.out.println(r1 + " / " + r2 + " = " + r1.divide(r2));
System.out.println(r2 + " / " + r3 + " = " + r2.divide(r3));
System.out.println(r3 + " / " + r4 + " = " + r3.divide(r4));
}
}