Self replicating code

self-replication.py

x = 'print "x = " + chr(39) + x + chr(39) + "; exec(x)"'; exec(x)

self-replication1.c

#include <stdio.h>
#define CODE "#include <stdio.h>%c#define CODE %c%s%c%cint main(void){ return printf(CODE, 10, 34, CODE, 34, 10, 10); }%c"
int main(void){ return printf(CODE, 10, 34, CODE, 34, 10, 10); }

self-replication2.c

#include <stdio.h>

#define CODE int main(void){ return printf("#include <stdio.h>\n\n#define CODE %s\n\n/* http://gcc.gnu.org/onlinedocs/cpp/Stringification.html */\n#define XQUOTE(x) QUOTE(x)\n#define QUOTE(x) #x\n\nconst char* SOURCE = XQUOTE(CODE);\nCODE\n", SOURCE); }

/* http://gcc.gnu.org/onlinedocs/cpp/Stringification.html */
#define XQUOTE(x) QUOTE(x)
#define QUOTE(x) #x

const char* SOURCE = XQUOTE(CODE);
CODE