Q11
Question 11
Create a class called Fraction that can be used to represent the ratio of two integers. Include appropriate constructors and methods. If the denominator becomes zero, throw and handle an exception.
Code
/**
*Solution for Ans. 11
* @author Jatin Kamboj 8647
*/
import java.util.Scanner;
class Frac {
private int numerator; // Fraction numerator
private int denominator; // Fraction denominator
/*-----------------------------------------------------------------
* constructor
* If fraction is negative,
* put negative number in numerator
*/
public Frac(int num, int denom) {
numerator = (denom < 0 ? -num : num);
denominator = (denom < 0 ? -denom : denom);
}
/*-----------------------------------------------------------------
* setNumerator
* numerator is set to be the given parameter
*/
public void setNumerator(int num) {
numerator = num;
}
/*-----------------------------------------------------------------
* getNumerator
* return numerator
*/
public int getNumerator() {
return numerator;
}
/*-----------------------------------------------------------------
* setDenominator
* denominator is set to be the
* given parameter (zero is ignored),
* if denominator is negative,
* numerator is adjusted
*/
public void setDenominator(int denom) {
try {
if (denom > 0) {
denominator = denom;
}
if (denom < 0) {
numerator = -numerator;
denominator = -denom;
}
} catch (ArithmeticException e) {
System.out.println(e.getMessage() +
" Exception Condition occurred" +
" [Division by zero]");
}
}
/*-----------------------------------------------------------------
* getDenominator
* return denominator
*/
public int getDenominator() {
return denominator;
}
/*-----------------------------------------------------------------
* reduce
* reduce Fraction to lowest terms
* by finding largest common denominator
* and dividing it out
*/
public void reduce() {
// find the larger of the numerator and denominator
try {
int x = 1 / denominator;
} catch (ArithmeticException e) {
System.out.println(e.getMessage() +
" Exception Condition occurred" +
" [Division by zero]");
}
int n = numerator,
d = denominator,
largest;
if (numerator < 0) {
n = -numerator;
}
if (n > d) {
largest = n;
} else {
largest = d;
}
// find the largest number
// that divide the numerator and
// denominator evenly
int gcd = 0;
for (int i = largest; i >= 2; i--) {
if (numerator % i == 0 &&
denominator % i == 0) {
gcd = i;
break;
}
}
// divide the largest common denominator
// out of numerator, denominator
if (gcd != 0) {
numerator /= gcd;
denominator /= gcd;
}
}
}
public class java_6 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int choice = 0;
System.out.println("\nThis program will depict" +
" simplest ratio of fractions and " +
"catch zero division error");
while (choice <= 5) {
System.out.print("\nEnter Numerator: ");
int num = sc.nextInt();
System.out.print("Enter Denominator: ");
int den = sc.nextInt();
Frac f = new Frac(num, den);
f.setDenominator(den);
f.setNumerator(num);
f.reduce();
choice = choice + 1;
System.out.println("The Ratio => " +
f.getNumerator() +
" : " +
f.getDenominator());
}
}
}Output
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