/* You have to use the following template to submit to Revel.
   Note: To test the code using the CheckExerciseTool, you will submit entire code.
   To submit your code to Revel, you must only submit the code enclosed between
     // BEGIN REVEL SUBMISSION

     // END REVEL SUBMISSION
*/ 
import java.math.*;
import java.util.Scanner;

public class Exercise13_15 {
  public static void main(String[] args) {
    // Prompt the user to enter two Rational numbers
    Scanner input = new Scanner(System.in);
    System.out.print("Enter rational number1 with numerator and denominator seperated by a space: ");
    String n1 = input.next();
    String d1 = input.next();

    System.out.print("Enter rational number2 with numerator and denominator seperated by a space: ");
    String n2 = input.next();
    String d2 = input.next();

    RationalUsingBigInteger r1 = new RationalUsingBigInteger(new BigInteger(n1), new BigInteger(d1));
    RationalUsingBigInteger r2 = new RationalUsingBigInteger(new BigInteger(n2), new BigInteger(d2));

    // Display results
    System.out.println(r1 + " + " + r2 + " = " + r1.add(r2));
    System.out.println(r1 + " - " + r2 + " = " + r1.subtract(r2));
    System.out.println(r1 + " * " + r2 + " = " + r1.multiply(r2));
    System.out.println(r1 + " / " + r2 + " = " + r1.divide(r2));
    System.out.println(r2 + " is " + r2.doubleValue());
  }
}

// BEGIN REVEL SUBMISSION
class RationalUsingBigInteger extends Number implements Comparable<RationalUsingBigInteger> {
  // Data fields for numerator and denominator
  private BigInteger numerator = BigInteger.ZERO;
  private BigInteger denominator = BigInteger.ONE;

  // Write your code
}
// END REVEL SUBMISSION