#include <stdio.h>
#include <string.h>
struct _Phone_Entry {
     const char *name; 
     const char *number; 
};
typedef struct _Phone_Entry Phone_Entry;
static Phone_Entry _start_entries[] = {
       { "Wolfgang Amadeus Mozart", "+01 23 456-78910" },
       { "Ludwig van Beethoven", "+12 34 567-89101" },
       { "Richard Georg Strauss", "+23 45 678-91012" },
       { "Heitor Villa-Lobos", "+34 56 789-10123" },
       { NULL, NULL }
}; 
static void
_phone_entry_free_cb(void *data)
{
   free(data);
}
int
{
   int i;
   const char *entry_name = "Heitor Villa-Lobos";
   int entry_size;
   const char *saved_entry_name = "Alceu Valenca";
   int saved_entry_size = sizeof("Alceu Valenca");
   const char *phone = NULL;
   
   for (i = 0; _start_entries[i].name != NULL; i++)
     {
                      strdup(_start_entries[i].number));
     }
   
   printf("Hash entry successfully deleted? %d\n\n", r);
                                  sizeof("Ludwig van Beethoven"));
                                 sizeof("Ludwig van Beethoven"), hash);
   printf("Hash entry successfully deleted? %d\n\n", r);
   printf("Hash entry successfully deleted? %d\n\n", r);
   
   entry_name = "Raul_Seixas";
   entry_size = sizeof("Raul Seixas");
   phone = strdup("+33 33 333-33333");
   
   printf("Hash entry successfully deleted? %d\n\n", r);
   
   phone = strdup("+44 44 444-44444");
                                saved_entry_size, hash, phone);
   
                                  saved_entry_size, hash);
   if (phone)
     {
        char *newphone = strdup("+55 55 555-55555");
                                         saved_entry_size, hash, newphone);
        if (phone)
          printf("changing phone to %s, old one was %s\n", newphone, phone);
        else
          printf("couldn't modify entry identified by %d\n", hash);
     }
   else
     {
        printf("couldn't find entry identified by %d\n", hash);
     }
}