Re: hypot()

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Philipp K. Janert wrote:
> Can we rely on the hypot() function to exist
> on all platforms that we care about?

No.

> It is part of C99 - is this good enough?

No.  There are way too many platforms out there that don't have C99 yet, 
and some that may never get it (Microsoft, e.g., reportedly decided to 
ignore it completely).