# include <stdio.h>
 
    /* Demo code showing the usage of the cleanup variable
      attribute. See:http://g...content-available-to-author-only...u.org/onlinedocs/gcc/Variable-Attributes.html
    */
 
    /* cleanup function
      the argument is a int * to accept the address
      to the final value
    */
 
    void clean_up(int *final_value)
    {
      printf("Cleaning up\n");
      printf("Final value: %d\n",*final_value);
 
    }
 
    int main(int argc, char **argv)
    {
      /* declare cleanup attribute along with initiliazation
        Without the cleanup attribute, this is equivalent
        to:
        int avar = 1;
     */
 
      int avar __attribute__ ((__cleanup__(clean_up))) = 1;
      avar = 5;
 
      return 0;
    }

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