Solved

rounding error in Powerbuilder

Posted on 2014-02-05
2
471 Views
Last Modified: 2014-02-05
Hello

I want to do this calculation in Powerbuilder Ver 12.1 Build 6639 on Windows 7 64 Bit.

double ld_val_1 = 111.3
double ld_val_2 = 111

double ld_result

ld_result = ld_val_1 - ld_val_2

ld_result should have the value 0.3, but I get the value 0.2999999999999972.

It this a common error or is only my system sick?

Sincerely

Ivo Raemy
0
Comment
Question by:ivoraemy
2 Comments
 
LVL 78

Accepted Solution

by:
David Johnson, CD, MVP earned 500 total points
ID: 39837862
no it is normal round off the extra numbers and you will get what you desire floating point numbers are never exact when you do calculations on them.  That or use integer math after normalizing i.e.
long val1 =1100
long val2 =1130
long difference
double result = double (difference/100)
0
 

Author Comment

by:ivoraemy
ID: 39838053
Dear Sir

Thank you for your comment.

If I work with the data type decimal (28 digits), it works. Double has 15 digits of precision

decimal ld_val_1 = 111.3
decimal ld_val_2 = 111

decimal ld_result

ld_result = ld_val_1 - ld_val_2

Sincerely

Ivo Raemy
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

A short article about problems I had with the new location API and permissions in Marshmallow
This is about my first experience with programming Arduino.
With the advent of Windows 10, Microsoft is pushing a Get Windows 10 icon into the notification area (system tray) of qualifying computers. There are many reasons for wanting to remove this icon. This two-part Experts Exchange video Micro Tutorial s…
In this seventh video of the Xpdf series, we discuss and demonstrate the PDFfonts utility, which lists all the fonts used in a PDF file. It does this via a command line interface, making it suitable for use in programs, scripts, batch files — any pl…

920 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

14 Experts available now in Live!

Get 1:1 Help Now