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fractions part2

Posted on 1998-11-01
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Last Modified: 2010-04-02
I have this recursive function again.
long gcd (long x, long y)
{
   return (x==0L) ? y : gcd( y % x,x);
}
this is supposed to keep fractions in the lowest terms.
it works fine for addition and subtraction
how can I use it for multiplication and division.
I have always multiplied fractions like this
a/b *c/d = a *c / b*d
how can I use the gcd to reduce
thanks in advance.
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Question by:strmtrpr
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3 Comments
 
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by:ozo
ID: 1176769
gcd(a*c,b*d)
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Accepted Solution

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nietod earned 50 total points
ID: 1176770
Once you have your result

(a*c)/(b*d)

use GCD to find the greatest common factor of  the numerator and the denominator, that is

GCD(a*c,b*d)

Then divide the numerator and denumenator by this GCD value.  Let me know if you have questions.


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Author Comment

by:strmtrpr
ID: 1176771
that did it , I had the right idea I just messed up my syntax  a little.

Thank you for your help.
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