#include <stdio.h> #include <sys/shm.h> #include <sys/stat.h>int main () { int segment_id;	  char* shared_memory;	  struct shmid_ds shmbuffer;	  int segment_size;	  const int shared_segment_size = 0x6400;	  /* Allocate a shared memory segment. */	  segment_id = shmget (IPC_PRIVATE, shared_segment_size, IPC_CREAT | IPC_EXCL | S_IRUSR | S_IWUSR);	   /* Attach the shared memory segment. */ shared_memory = (char*) shmat (segment_id, 0, 0);	  printf (\u201cshared memory attached at address %p\n\u201d, shared_memory);	  /* Determine the segment\u2019s size. */	  shmctl (segment_id, IPC_STAT, &shmbuffer);	  segment_size = shmbuffer.shm_segsz;	  printf (\u201csegment size: %d\n\u201d, segment_size);	  /* Write a string to the shared memory segment. */	  sprintf (shared_memory, \u201cHello, world.\u201d);	  /* Detach the shared memory segment. */	  shmdt (shared_memory);	  /* Reattach the shared memory segment, at a different address. */ shared_memory = (char*) shmat (segment_id, (void*) 0x5000000, 0);	  printf (\u201cshared memory reattached at address %p\n\u201d, shared_memory);	  /* Print out the string from shared memory. */	  printf (\u201c%s\n\u201d, shared_memory);	  /* Detach the shared memory segment. */	  shmdt (shared_memory);	  /* Deallocate the shared memory segment.  */	  shmctl (segment_id, IPC_RMID, 0);	  return 0; }