Zugg Software :: View topic - 2.37->3.34 some float math broke

Beginner Joined: 20 Jun 2006 Posts: 24

The "nerve center" of my package is my prompt trigger. It basically looks for something along the lines of: %d(%d) %d(%d) %d(%d) to grab the max and current values for hitpoints, mana and moves respectively.

I then do things like #VAR hpp ( ( %1.0 / %2.0 ) * 100 ) to store my current hp as a percentage of total. This worked fine in 2.37 and now in 3.34 it returns 0 no matter what I seem to do...

What am I missing?

GURU Joined: 23 Dec 2000 Posts: 4834 Location: USA

The problem is likely how you are attempting to cast %1 and %2. Use %float(%N) rather than %N.0.

Posted: Tue Mar 13, 2012 3:15 pm

#VAR hpp ( ( %1 / %2) * 100.0 )
would work

GURU Joined: 23 Dec 2000 Posts: 4834 Location: USA

no, it wouldn't. Unless the MUD is sending floating-point numbers already (which is very doubtful), the division of %1 by %2 would operate under integer math--meaning that if %1 < %2 then (%1 / %2) = 0.

Posted: Wed Mar 14, 2012 11:31 am

but its part of a larger equation that does include a floating point....

Wizard Joined: 22 Mar 2007 Posts: 2320

That doesn't matter, Shalimar. Yes, the final result will be a floating point number, but the division will be integer division unless either the numerator or the denominator is a floating point number. However, the equation could have been rewritten so that it would use floating point division by making the numerator or denominator a floating point, e.g.:
#VAR hpp ( ( %1 * 100.0 ) / %2) )