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Date: Mon, 4 Feb 2002 11:44:35 -0800 (PST)
From: Ed Symanzik <zik@msu.edu>
To: freebsd-gnats-submit@FreeBSD.org
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Subject: misc/34617: /usr/bin/units mangles temperature conversion
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>Number:         34617
>Category:       misc
>Synopsis:       /usr/bin/units mangles temperature conversion
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Feb 04 11:50:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Ed Symanzik
>Release:        4.4
>Organization:
Michigan State University
>Environment:
FreeBSD hardy.cl.msu.edu 4.4-STABLE FreeBSD 4.4-STABLE #32: Thu Oct 11 10:19:10 EDT 2001     root@:/usr/src/sys/compile/ZIK  i386

>Description:
units results for temperature conversions is incorrect. 
units will not accept non-positive numbers.

The problem is that temperature scales do not intersect
at zero.  There should be a way to note this in units.lib.

Perhaps
  degC  K +273
  degF  5|9 degC +32
>How-To-Repeat:
> units
497 units, 54 prefixes
You have: 20 degC
You want: K
	* 20
	/ 0.05
You have: 32 degF
You want: degC
	* 17.777778
	/ 0.05625
You have: 0 degF
units: unit reduces to zero
You have: -9 degC
unknown unit '-'

>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted:

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