Quine

Have u ever come across a code that prints its own code as an output....

these type of codes are calle Quines... and here is a link containg many single liners .

but the most simple one in linux would be
int main()
{
system("cat filename.c");
}
I tried this code.. it compiled with a warning but executed...

Aneways there is in iterestiing link which gives the world's shortest quine... if u have two spare minutes, go throught it.. it would be interesting...