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From: glen herrmannsfeldt <g...@ugcs.caltech.edu>
Newsgroups: comp.lang.fortran
Subject: Re: itoc function - can it be simplified?
Date: Sun, 8 Apr 2012 01:13:29 +0000 (UTC)
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robert.corb...@oracle.com wrote:

(snip)
> The OP was concerned with conversion integer values, not
> floating-point.

> I have seen the function you describe referred to as logd,
> I assume in analogy to the IEEE function logb.  The analogy
> is not exact.  I have seen such functions used in the
> implementation of the G edit descriptor, where it almost
> always causes trouble.  The problem is that it does not
> take rounding into account.  

I have seen many times the suggestiong of using LOG10(FLOAT(n))
to find the appropriate power of 10 for integers. I suspect that
rounding could cause problems there, though I don't know of
any actual implementations.

> I know of one implementation
> that would print a field of asterisks for values close to
> but less than powers of ten, because it did not account for
> rounding.

Oops.

-- glen