Rational.java

import java.io.*;
import java.util.*;

public class Rational {
    private int a,b;
   
    public int geta() {return a;}
    public int getb() {return b;}
    public String getInfo() {return "a = " + a + ", b = " + b;}


    public Rational(int p, int q) {
	a = p;
	b = q;
    }



    public int gcd(int a, int b) {
	if (b==0) {
	    return a;}
	else {
	    return gcd(b,a%b);} 
    }
    
    public void reduce() {
	int c = gcd(a,b);
	a = a / c;
	b = b / c;
    }
    
    public boolean equals(Rational other) {
        int p = other.geta();
	int q = other.getb();	
	return ((((double) a) / ((double) b)) == (((double) p) / ((double) q)));
    }

    public Rational mult(Rational other) {
	int p = other.geta();
	int q = other.getb();
	Rational returnRat;
	returnRat = new Rational(a*p,b*q);
	returnRat.reduce();
	return returnRat;
    }

    public int compareTo(Rational other) {
	int p = other.geta();
	int q = other.getb();
	
	double c = ((double) a) / ((double) b);
	double r = ((double) p) / ((double) q);

	if (c > r) {
	    return 1;}
	else {
	    if (c == r) {
		return 0;}
	    else {
		return -1;}
	}
    }
}