On Thu, Jun 30, 2016 at 03:51:51PM +0800, John Hsu wrote: > Yes, it'll be more readable. I have a question. Why to add !! in > front of bit wise operation? What does it mean? It's redundant in almost all cases. It translates an integer value into a 0/1 value (so if you've got a value of 2 it'll end up as 1) by doing a double not. This very rarely matters unless you're storing the value in an integer and comparing it to 1 to check for truth, otherwise C will translate any non-zero value into true in any logic context.
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