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bug#24561: Unmathematical bc exponentiation behavior
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From: |
Andreas Schwab |
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Subject: |
bug#24561: Unmathematical bc exponentiation behavior |
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Date: |
Wed, 28 Sep 2016 20:10:15 +0200 |
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User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.1 (gnu/linux) |
On Sep 28 2016, "Martens, Tobias" <address@hidden> wrote:
> echo "-(1)^2" | bc
> 1
>
> I would have expected -1. This behavior is unmathematical and very confusing,
> because otherwise bc acts quite logic.
> Not sure if it is mandated by POSIX
Unary - has higher precedence than ^, thus it is parsed as (-(1))^2.
Andreas.
--
Andreas Schwab, address@hidden
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