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 calloc()                Allocate and Zero Memory

 #include   <stdlib.h>                   Required for declarations only
 #include  <alloc.h>

 void       *calloc(n,size);
 size_t     n;                           Number of elements to allocate
 size_t     size;                        Number of bytes in each element

    calloc() allocates storage for 'n' elements of 'size' bytes each.
    All elements are initialized to 0.  The storage space is guaranteed
    to be correctly aligned for any data type.


       Returns:     A pointer to the allocated space, or NULL (defined in
                    <stdio.h>) if the space cannot be allocated.  If
                    'size' == 0, NULL is returned.

         Notes:     Memory allocated with calloc() should only be freed
                    with free().

   -------------------------------- Example ---------------------------------

    The following statements allocate space for 50 long integers and then
    free the allocated space.

           #include <alloc.h>
           #include <stdio.h>      /* for printf and NULL */

           long *memptr;

           main()
           {
               if ((memptr = (long *) calloc(50, sizeof(long))) == NULL)
                   printf("not enough room to allocate memory\n");
               else {
                   .
                   .
                   free(memptr);
               }
           }