exec_c.c

//&>/dev/null;x="${0%.*}";[ ! "$x" -ot "$0" ]||(rm -f "$x";cc -o "$x" "$0")&&"$x" $*;exit
#include <stdio.h>

int main() {
  char c;
  while ((c = getchar()) != EOF)
    putchar(c);
  return 0;
}


// I'd call this the most useful. I put this at the top of any simple single-file C scripts, so that I can execute them directly. It compiles if necessary and calls the executable, passing on any parameters.
// http://stackoverflow.com/questions/12830/most-elegant-amusing-or-strange-code-one-liners/12907#12907