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 malloc()                Allocate Memory Block

 #include   <malloc.h>                   Required for declarations only
 #include   <stdlib.h>                   For ANSI compatibility

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

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

    Returns:    Pointer to allocated space.  Returns NULL (defined in
                <stdio.h>) if the space cannot be allocated.

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

                malloc() may allocate a block larger than 'size' bytes
                because of space required for alignment and DOS
                housekeeping.  The space is always suitably aligned for
                storage of any type of object. (Use a cast on the return
                value if a pointer to a type other than void is needed.)

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

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

           #include <malloc.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);
               }
           }