Subj : Re: possible overflow?
To   : comp.programming
From : Markus Becker
Date : Sat Aug 27 2005 01:35 am

Rob Somers <mr_semantics@hotmail.com> schrieb:

> putchar('0' + !!(input & mask));   
>
> and how it works?

!!anything makes any value that's not zero equal to one:

!!0 == 0
!!1 == 1
!!2 == 1
etc.

Markus

.