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 malloc()                Allocate Memory Block

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

 void       *malloc(size);
 size_t     size;                        Number of bytes to allocate

    malloc() allocates a memory block of 'size' bytes.

       Returns:     Pointer to allocated space.  Returns NULL (defined in
                    <stdio.h>) if the space cannot be allocated.  The
                    contents of the block are not changed.  If 'size' ==
                    0, NULL is returned.

         Notes:     Use free() to deallocate a block allocated with
                    malloc().

                    The block allocated by malloc() may be larger than
                    'size' bytes because of space required for alignment
                    and DOS housekeeping.  The space is guaranteed to be
                    suitably aligned for storage of any type of object.

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

    The following statements allocate space for 1000 bytes and then free
    the allocated space.

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

           char *memptr;

           main()
           {
               if ((memptr = malloc(1000)) == NULL)
                   printf("not enough room to allocate memory\n");
               else {
                    .
                    .
                    free(memptr);
               }
           }