Beefy Boxes and Bandwidth Generously Provided by pair Networks
P is for Practical

Re: Comparing results of math operations (try integer)

by LanX (Chancellor)
on Apr 16, 2014 at 09:55 UTC ( #1082475=note: print w/ replies, xml ) Need Help??

in reply to Comparing results of math operations

Better avoid decimal fractions!

They can't always be transformed loss-free to binary fractions (see Re: eq vs ==)

But this works:

DB<107> $x=95*806 /100; => "765.7" DB<108> $y=13*589 /10; => "765.7" DB<109> $x <=> $y => 0

So just calculate with integers and shift the decimal point afterwards!

The deeper reason for this mess is that Humans have too many fingers ;-)

Cheers Rolf

( addicted to the Perl Programming Language)

Comment on Re: Comparing results of math operations (try integer)
Download Code

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1082475]
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others meditating upon the Monastery: (7)
As of 2015-11-27 18:28 GMT
Find Nodes?
    Voting Booth?

    What would be the most significant thing to happen if a rope (or wire) tied the Earth and the Moon together?

    Results (731 votes), past polls