Error/Bug adding floating point numbers

[Daniel Thommes]

Hello,

I think to have found a bug in Xalan-J 2.7.0 when adding floating point numbers:

My XML-File:

<?xml version="1.0" encoding="UTF-8"?>
<values>
  <x>2.33</x>
  <y>2.001</y>
</values>


My XSLT-File:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform";>
        <xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes"/>
        <xsl:template match="/values">
                <results>
                        <sum>
                                <xsl:value-of select="x + y"/>
                        </sum>
                        <diff>
                                <xsl:value-of select="x - y"/>
                        </diff>
                </results>
        </xsl:template>
</xsl:stylesheet>


The result procuced by Xalan:

<?xml version="1.0" encoding="UTF-8"?>
<results>
        <sum>4.3309999999999995</sum>
        <diff>0.3290000000000002</diff>
</results>

I know, that the error is very small, but because in a later step I will round 
those numbers, it is likely that there will happen bigger errors thinking of 
worst case.

Any suggestions how to fix this problem? Do you think, I should open an issue 
for this?

Greetings

Daniel


-- 


Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen!
Ideal für Modem und ISDN: http://www.gmx.net/de/go/smartsurfer