#include <stdlib.h>

 *calloc (
   num,    /* number of items */
   len);   /* length of each item */

The calloc function allocates memory for an array of num elements. Each element in the array occupies len bytes and is initialized to 0. The total number of bytes of memory allocated is num * len.

Note

The calloc function returns a pointer to the allocated memory or a null pointer if the memory allocation request cannot be satisfied.

free, init_mempool, malloc, realloc

#include <stdlib.h>
#include <stdio.h> /* for printf */

void tst_calloc (void) {
   *p; /* ptr to array of 100 ints */

  p = calloc (100, sizeof (int));

  if (p == 0)
    printf ("Error allocating array\n");
  else
    printf ("Array address is %p\n", (void *) p);
}