[gecode-users] Decimal

[Christian Schulte]

I think you should go for float variables, however I do not know whether
they have been ported to 3.* Any comment


 

Christian

 

From: users-bounces at gecode.org [mailto:users-bounces at gecode.org] On Behalf
Of Javier Andrés Mena Zapata
Sent: Tuesday, May 19, 2009 9:30 PM
To: gecode list
Subject: [gecode-users] Decimal

 

Hi,

I'm modelling a financial problem (calculating minimum interests payments
and ROI), and I want to model the "money" value using Gecode integer
variables.

For example, representing 10.25 is like storing 1025 divided by 100.  But,
there's a problem with the multiplication, because the interests rates are
float values with very muchs decimals.  For example 0.00643403011.  I think
there may be an overflow if I model this decimal using something like 6434
divided by 1000000.

What do you think it's the best technique for modelling this problem:

1.	Use IntVars and the current propagators (as proposed here).
2.	Use IntVars, and creating new propagators for IntVar x Float
multiplication.
3.	Use float vars, and its propagators.
4.	Other?

Thanks,

-- 
Javier Andrés Mena Zapata
http://StrategicDecision.net/
Cali - Colombia

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