[v3] FP printing, take 2

[Andreas Schwab]

Jerry Quinn <jlquinn@optonline.net> writes:

> I have to admit I'm not sure about whether digit chars are required to be in
> order.

The C standard guarantees that (5.2.1#3), but I can't find a similar
requirement in the C++ standard.

Andreas.

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Andreas Schwab, SuSE Labs, schwab@suse.de
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