char string[] = "AaBbCcDd"; int size_in_bytes = 0;

size_in_bytes = length ("AaBbCcDd");                                           /* "pchar  &char[0]" */

size_in_bytes = length (string);                                               /* "pchar  &char[0]" */

size_in_bytes = length (pointer), { pointer = &string[0] };                    /* "pchar" */

size_in_bytes = length (pointer), { pointer = &string[5] };                    /* "pchar" */