Boolean Operators Slighted in C

[Daniel R. Levy]

In article <732 at steinmetz.UUCP>, davidsen at steinmetz.UUCP (Davidsen) writes:
>XOR can be defined as an (ugly) macro, I believe.
>
>#define XOR(a,b) (((a) != 0) != ((b) != 0)
>/* or if you like small better than readable */
>#define XOR(a,b) (!!(a) != !!(b))
>--
>	-bill davidsen

or even

#define XOR(a,b)	(!(a) != !(b))

since XOR(not-a,not-b) == XOR(a,b)
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