Question

I don't really see a sign that there's error in my code, but when i run it I see these.

----------TESTING CONSTRUCTORS--------------
Exception in thread "main" java.lang.ArithmeticException: / by zero
   at hw2.Fraction.greatestCommonDivisor(Fraction.java:224)
   at hw2.Fraction.reduceToLowestTerms(Fraction.java:209)
   at hw2.Fraction.(Fraction.java:44)
   at hw2.Fraction.main(Fraction.java:285

What does this mean? I'm currently coding a java program on Fractions.

1. The thing I'm confused are I definitely know there's no error in greatestCommonDivisor and reducedToLowestTerms as those were the codes provided by the instructors and were never modified. (main function as well)

for , i've called reducedToLowestTerms in function public Fraction(initial numerator, initial denominator)  

   public Fraction(int initialNumerator, int initialDenominator)
   {
   if (initialDenominator == 0)
   {
       initialDenominator = 1;
   }
   adjustSigns();
   reduceToLowestTerms();
   }

EDIT: Here's a given code of GCD

private int greatestCommonDivisor(int integerOne, int integerTwo)
   {
       int result;

       if (integerOne % integerTwo == 0)
           result = integerTwo;
       else
           result = greatestCommonDivisor(integerTwo, integerOne % integerTwo);

       return result;
   }   // end greatestCommonDivisor

Answer 1

You are getting this error because somehow when your code is running for some input value, it has come across an operation where you are trying to divide a number by 0, resulting in DivideByZeroArithmeticException.

My suspection is that in the greatestCommonDivisor(), you might have misplaced the if/else conditions, I have tried to replicate the issue in my local environment but could not. The GCD function seems to be working fine.

In case you are still getting the error, kindly provide me the full code, and I will look into it.