4. Consider the following program.
public class Fraction {
private int numerator;
private int denominator;
public Fraction (int n, int d) {
numerator = n;
denominator = d;
public Fraction add (Fraction f)
return new Fraction (numerator * f.denominator +
1. numerator * denominator, denominator + f.denominator);
public Fraction add (int x) {
return new Fraction (numerator + x
denominator, denominator);
public Fraction add (int n, int d)
return new Fraction (numerator
denominator * d);
d+n* denominator,
public String toString() {
return numerator + "/" + denominator;
public static void main(String[] args) {
Fraction f1 = new Fraction (1, 2);
Fraction f2 = new Fraction (2, 3);
Fraction f3 = new Fraction (3, 4);
Fraction sums = new Fraction [4];
sums [0] - fl.add(f3);
sums [1] - f2.add(f3);
sums [2] - fl.add(1);
sums [31 - f2.add(3, 3);
for (int i = 0; i <= sums.length; i++) {
System.out.println(sums[i].toString());
The above program compiles without error; what does it display when it is executed?
