Bug 210484

Summary: dc doesn't enforce precision consistently (sometimes)
Product: [Fedora] Fedora Reporter: JW <ohtmvyyn>
Component: bcAssignee: Zdenek Prikryl <zprikryl>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 5   
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OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2007-07-26 08:33:28 UTC Type: ---
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Description JW 2006-10-12 14:46:35 UTC 
Description of problem:
dc doesn't enforce precision.


Version-Release number of selected component (if applicable):
bc-1.06-19.2.1

How reproducible:
Always

Steps to Reproduce:
1.echo "k 0 1 2 / p" | dc
2.echo "k 0 1 0.4 * p" | dc
3.
  
Actual results:
1. "0"
2. ".4"

Expected results:
1. "0"
2. "0"

Additional info:
If precision setting is meaningless (as it appears to be in case of
multiplication) then a command should be available to actually enforce the
desired precision.
Comment 1 Zdenek Prikryl 2007-07-26 08:33:28 UTC 
FC5 has now been EOL'd.

This is not a bug but a feature. Work with precisions is described at
http://www.gnu.org/software/bc/manual/dc-1.05/html_mono/dc.html. Operation "/"
takes care about precision value which is set by "k". Others operations (like
"*") calculates precision from operands (sometimes co-operates with precision
value).

As I see in source code, precisions are calculated exactly as is described in
doc above.

Zdenek.