Fraction abs() {
Fraction z = new Fraction();
if (numerator.compareTo(BigInteger.ZERO) < 0) {
z.numerator = numerator.negate();
} else {
z.numerator = numerator;
}
if (denominator.compareTo(BigInteger.ZERO) < 0) {
z.denominator = denominator.negate();
} else {
z.denominator = denominator;
}
return z;
}
Fraction divide(Fraction y) {
Fraction z = new Fraction();
z.numerator = numerator.multiply(y.denominator);
z.denominator = denominator.multiply(y.numerator);
z.simplify();
return z;
}
Fraction subtract(Fraction y) {
Fraction z = new Fraction();
gcd = denominator.gcd(y.denominator);
z.denominator = denominator.multiply(y.denominator).divide(gcd);
z.numerator = numerator.multiply(z.denominator.divide(denominator))
.subtract(y.numerator.multiply(z.denominator.divide(y.denominator)));
z.simplify();
return z;
}
public static void main(String[] args) {
Fraction f1 = new Fraction();
Fraction f2 = new Fraction();
for (int i = 1; i <= 4; i++) {
f1.numerator = 1;
f1.denominator = 2;
f2.numerator = 3;
f2.denominator = 4;
switch (i) {
case 1:
System.out.println("f1=" + f1.numerator + "/" + f1.denominator);
System.out.println("f2=" + f2.numerator + "/" + f2.denominator);
f1.add(f2);
System.out.println("f1+f2=" + f1.numerator + "/" + f1.denominator);
break;
case 2:
f1.add(3);
System.out.println("f1+3=" + f1.numerator + "/" + f1.denominator);
break;
case 3:
f2.sub(f1);
System.out.println("f2-f1=" + f2.numerator + "/" + f2.denominator);
break;
case 4:
f2.sub(1);
System.out.println("f2-1=" + f2.numerator + "/" + f2.denominator);
break;
}
}
}
Fraction negate() {
Fraction z = this;
z.numerator = z.numerator.negate();
return z;
}