Low Level Bit Hacks You Absolutely Must Know

[artdutra04]

Originally Posted by EricVanWyk

If any of my students use any of these bit hacks without commenting them, I will smack them.

But altering register values via bitwise operations in nested ternary commands is so much fun!

[EricVanWyk]

Originally Posted by artdutra04

But altering register values via bitwise operations in nested ternary commands is so much fun!

Smack!

[demosthenes2k8]

artdura04, you're amazing. The only thing I can think to add to that is that it has to be done inside an obfuscated macro using a templated function pointer and several magic numbers.

[Robototes2412]

or you can be a super-meanie and use a classic turing-style method for making a hello world program, like I did:

#include <stdio.h>
int main(){char* p=new char[1024];++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;while(*p){++p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++p;++*p;++*p;++*p;++p;++*p;--p;--p;--p;--p;--*p;}++p;++*p;++*p;putchar(*p);++p;++*p;putchar(*p);++*p;++*p;++*p;++*p;++*p;++*p;++*p;putchar(*p);putchar(*p);++*p;++*p;++*p;putchar(*p);++p;++*p;++*p;putchar(*p);--p;--p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;++*p;putchar(*p);++p;putchar(*p);++*p;++*p;++*p;putchar(*p);--*p;--*p;--*p;--*p;--*p;--*p;putchar(*p);--*p;--*p;--*p;--*p;--*p;--*p;--*p;--*p;putchar(*p);++p;++*p;putchar(*p);++p;putchar(*p);return 0;}

its evil