Why does sizeof report a larger size than I expect for a structure type, as if there was padding at the end?
Structures may have this padding (as well as internal padding; see also question 9.5), so that alignment properties will be preserved when an array of contiguous structures is allocated. 9.10: My compiler is leaving holes in structures, which is wasting space and preventing “binary” I/O to external data files. Can I turn off the padding, or otherwise control the alignment of structs? A: Your compiler may provide an extension to give you this control (perhaps a #pragma), but there is no standard method. See also question 17.2.
