Re: !!, what is it?

"Mike Wahler" <mkwahler@xxxxxxxxxxxx> writes:


[...]

> No, ! is an operator. It's result is always either zero or one.
^^^^^^^^^^^^

I think, C standarts says something about logical operations resusts;
if the result is false, it's value is 0 (zero). if the result is true,
it's value is non-zero (like -2, -1, 2, 3, ...). So, it must NOT be
one. This difference has seen according to compiler or target
platform.

For example; some compiler's headers provide TRUE and FALSE constants
like that;

#define FALSE 0
#define TRUE !FALSE

// or

#define TRUE (0==0)
#define FALSE !TRUE




[...]

Best Regards.

--
Cafer Şimşek
http://cafer.org
.

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