Re: C Questions

Richard Heathfield wrote:

pete said:

Richard Heathfield wrote:

! yields 0 if its (numeric!) operand is non-zero, and 1 otherwise.

! yields 0 if its scalar operand does not compare equal to zero,
and 1 otherwise.

Oh yes, you can do !p, can't you?
I see that as being rather silly, but
you're quite right that it's legal. I'm not sure that I see the
distinction between "is non-zero"
and "does not compare equal to zero". I
consider them to be equivalent statements.

A type conversion is required for a pointer
to be compared to zero,
and that's the difference between "compares" and "is".


Some more musings concerning the difference between
"compares" and "is":

(0) compares equal to (0u)
(-1) compares greater than (0u)
(0) compares greater than (-1)

Is (-1) greater than or less than (0u)?

--
pete
.

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