package pack;
public class Fraction implements Comparable<Fraction> {
	private int numerator, denom;

	public Fraction() {
		numerator = 0;
		denom = 1;
	}

	public Fraction(int num) {
		numerator = num;
		denom = 1;
	}

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

	private void reduce() {
		int new_demoniator = denom;
		boolean bool = false;
		if (denom < 0) {
			new_demoniator = denom * -1;
			bool = true;
		}
		int gcf = gcf(numerator, new_demoniator);
		numerator = numerator / gcf;
		denom = new_demoniator / gcf;
		if (bool)
			denom *= -1;
	}

	private int gcf(int a, int b) {
		int gcf = 1;
		for (int i = 2; i <= Math.min(a, b); i++) {
			if (numerator % i == 0 && denom % i == 0)
				gcf = i;
		}
		return gcf;
	}

	public Fraction add(Fraction f) {
		int commondenom = f.denom * denom;
		int frac_nume = (commondenom / f.denom) * f.numerator;
		int frac_denom = commondenom;
		int replaced_num = (commondenom / denom) * numerator;
		replaced_num += frac_nume;

		return new Fraction(replaced_num, commondenom);
	}

	public Fraction subtract(Fraction f) {

		int commondenom = f.denom * denom;
		int frac_nume = (commondenom / f.denom) * f.numerator;
		int frac_denom = commondenom;
		int replaced_num = (commondenom / denom) * numerator;

		replaced_num -= frac_nume;
		if (replaced_num < 0) {
			commondenom *= -1;
			replaced_num *= -1;
		}

		return new Fraction(replaced_num, commondenom);
	}

	public Fraction multiply(Fraction f) {
		int frac_nume = f.numerator * numerator;
		int frac_denom = f.denom * denom;
		return new Fraction(frac_nume, frac_denom);
	}

	public Fraction divide(Fraction f) {
		int temporary = f.numerator;
		;
		int replaced_num = f.denom;
		int new_demoniator = temporary;

		replaced_num *= numerator;
		new_demoniator *= denom;

		return new Fraction(replaced_num, new_demoniator);
	}

	public double toDecimal() {
		return (numerator + 0.0) / denom;
	}

	public int compareTo(Fraction f) {
		double decimal_one = numerator / (denom + 0.0);
		double decimal_two = f.numerator / (f.denom + 0.0);
		if (decimal_one > decimal_two)
			return 1;
		else if (decimal_one == decimal_two)
			return 0;
		else
			return -1;
	}

	public boolean equals(Fraction f) {
		double decimal_one = numerator / (denom + 0.0);
		double decimal_two = f.numerator / (f.denom + 0.0);
		return decimal_one == decimal_two;
	}

	public String toString() {
		if (denom == 1)
			return numerator + ".0";
		else
			return numerator + "/" + denom;
	}
}