C语言从入门到绝望

A clock in one line:

int main(int _,char**__){_^448&&main(-~_,__);__builtin_putchar(--_%64?32|-~7[__TIME__-_/8%8][">'txiZ^(~z?"-48]>>";;;====~$::199"[_*2&8|_/64]/(_&2?1:8)%8&1:10);}

Hello, World!

int main(int _,char**__){_^14&&__builtin_putchar(_["x2477501356789"][", HWeorld!"-48])&&main(-~_,__);}