非常简单

#include <stdio.h>
#define _00000000 main()
#define _00000001 int
#define _00000002 {
#define _00000003 }
#define _00000004 printf
#define _00000005 (
#define _00000006 )
#define _00000007 "5"
#define _00000008 ;

_00000001 _00000000 _00000002 _00000004 _00000005 _00000007 _00000006 _00000008 _00000003