public class Fraction { // Instance variables private int numerator; // Numerato
ID: 671365 • Letter: P
Question
public class Fraction {
// Instance variables
private int numerator; // Numerator of fraction
private int denominator; // Denominator of fraction
// Constructors
public Fraction(int num, int denom) {
numerator = num;
denominator = denom;
}
// Instance methods
public int getNumerator() {
return numerator;
}
public int getDenominator() {
return denominator;
}
public Fraction add(Fraction f) {
int num = numerator * f.denominator +
f.numerator * denominator;
int denom = denominator * f.denominator;
return new Fraction(num, denom);
}
}
Explanation / Answer
Required solution:
public class Fraction {
// Instance variables
private int numerator; // Numerator of fraction
private int denominator; // Denominator of fraction
// Constructors
public Fraction() {
numerator = 0;
denominator = 1;
}
public Fraction(int num) {
numerator = num;
denominator = 1;
}
public Fraction(int num, int denom) {
numerator = num;
denominator = denom;
}
// Instance methods
public int getNumerator() {
return numerator;
}
public int getDenominator() {
return denominator;
}
public Fraction divide(Fraction f) {
return new Fraction(numerator * f.denominator, f.numerator
* denominator);
}
public void scaleup(int factor) {
numerator = numerator * factor;
}
public void scaledown(int factor) {
if (factor == 0) {
System.out.println("Warning cannot scale down with 0");
System.exit(0);
}
denominator = denominator * factor;
}
public void scale(boolean flag, int factor) {
if (flag)
scaleup(factor);
else
scaledown(factor);
}
public Fraction add(Fraction f) {
int num = numerator * f.denominator + f.numerator * denominator;
int denom = denominator * f.denominator;
return new Fraction(num, denom);
}
}
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