Thread: program that prints itself

I guess someone has heard of the programs that when executed print their code like this one :

Code:

#include <stdio.h>

main()
{
     char*p="main(){char*p=%c%s%c;printf(p,34,p,34,10);}%c";
     printf(p,34,p,34,10);
}

Can someone explain me how it works or post a link cause i can't get it.