C and Sizeof question..

[Bill Campbell]

On Wed, Nov 12, 2008, Steve Jardine wrote:
>Calling all C Gurus!!
>
>Consider this C code:
>
>#include <stdio.h>
>main() {
>
>typedef struct {
>char           name[256];
>char           type[1]; 
>int             size;
>}resp;
>
>char n[256];
>char t[1];
>
>printf("sizeof resp is %d\n",sizeof(resp));
>printf("sizeof int is %d\n",sizeof(int));
>printf("Total: %d\n", sizeof(int)+sizeof(n)+sizeof(t));
>}
>
>Can anyone explain why the sizeof the struct is 264 bytes, yet adding up all of its components yields 261 bytes?
>Call me confused...

Confused:

This is likely because structure elements are being forced to modulo 4
addresses.

I first ran into this problem about 20 years ago porting Unify RDBMS code
from systems with Motorola MC68xxx bigendian processors to SCO Xenix and
Unix systems on little endian systems.

Bill
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