TestRationalClass.java

import java.math.BigInteger;

public class TestRationalClass {
    /** Main method */
    public static void main(String[] args) {
        // Create and initialize two rational numbers r1 and r2.
//        Rational r1 = new Rational(14, 37);
//        Rational r2 = new Rational(23, 67);
//
//        // 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());
//
//        Rational rational = new Rational(0, 1);
//        for (int i = 2; i <= 100; i++) {
//            rational = rational.add(new Rational(i - 1, i)); // 计算1/2 + 2/3 + 3/4 + ... + 99/100的和
//        }
//        System.out.println("Final result: " + rational);
//        System.out.println("Double value: " + rational.doubleValue());

        Rational r1 = new Rational(new BigInteger("14"), new BigInteger("37"));
        Rational r2 = new Rational(new BigInteger("23"), new BigInteger("67"));
        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());
        Rational rational = new Rational(new BigInteger("0"), new BigInteger("1"));
        for (int i = 2; i <= 100; i++) {
            rational = rational.add(new Rational(new BigInteger("" + (i - 1)),
                    new BigInteger("" + i))); // 计算1/2 + 2/3 + 3/4 + ... + 99/100的和
        }
        System.out.println("Final result: " + rational);
        System.out.println("Double value: " + rational.doubleValue());

        /*
           14/37 + 23/67 = 1789/2479
           14/37 - 23/67 = 87/2479
           14/37 * 23/67 = 322/2479
           14/37 / 23/67 = 938/851
           23/67 is 0.34328358208955223

           Final result: 264414864639329557497913717698145082779489/2788815009188499086581352357412492142272
           Double value: 94.81262248236038
       */
    }
}