C is full of surprises, and generally my favourite trick is trick du jour. While it's not strictly for C, Hacker's Delight[1] is my favourite collection of bit

C is full of surprises, and generally my favourite trick is trick du jour. While it's not strictly for C, Hacker's Delight[1] is my favourite collection of bit twiddling tricks. A highly recommended read if only for the intellectual value. [1] http://www.hackersdelight.org/ http://www.hackersdelight.org/