"Fran" <Fran@discussions.microsoft.com> wrote in message news:193B0BFA-3231-43CE-9DB6-3ABC9D589CB3@microsoft.com...
> sHi!
>
> I have a very strange problem with the behaviour of the sizeof command. I
> have tested it in vc6,vc 2001 and vc 2003. The problem is quite simple.
>
> When I made a sizeof to the next struct, it returns that the size is 40
> instead of 38. I consider that a short is 2 bytes, float 4 bytes, unsigned
> long 4 byte, unsigned short 2 bytes. If i add all the size of the fields it
> must be 38 but sizeof says that is 40.
>
> The struct is the next:
>
> typedef struct
> {
> short est;
> short numbe1;
> float dst;
> float Line;
> unsigned long tmp;
> float tmp1;
> float tmp2;
> unsigned long tck;
> unsigned long tl;
> unsigned short dp;
> unsigned short ldact;
> unsigned short lnc;
> }test;
>
> If I remove one unsigned short field, the size change to 36, but if made
> size of (unsigned short) it return 2.
>
> This is the other "crazy" struct:
>
> typedef struct
> {
> short est;
> short numbe1;
> float dst;
> float Line;
> unsigned long tmp;
> float tmp1;
> float tmp2;
> unsigned long tck;
> unsigned long tl;
> unsigned short dp;
> unsigned short ldact;
> }test;
>
> I'm getting crazy, any idea??
>
>
> Thank you very much for your help.
>
>
>
> The structure is the next:
>
>

"Fran" <Fran@discussions.microsoft.com> wrote in message
news:193B0BFA-3231-43CE-9DB6-3ABC9D589CB3@microsoft.com...
> sHi!
>
> I have a very strange problem with the behaviour of the sizeof command. I
> have tested it in vc6,vc 2001 and vc 2003. The problem is quite simple.
>
> When I made a sizeof to the next struct, it returns that the size is 40
> instead of 38. I consider that a short is 2 bytes, float 4 bytes, unsigned
> long 4 byte, unsigned short 2 bytes. If i add all the size of the fields
> it
> must be 38 but sizeof says that is 40.
>
> The struct is the next:
>
> typedef struct
> {
> short est;
> short numbe1;
> float dst;
> float Line;
> unsigned long tmp;
> float tmp1;
> float tmp2;
> unsigned long tck;
> unsigned long tl;
> unsigned short dp;
> unsigned short ldact;
> unsigned short lnc;
> }test;
>
> If I remove one unsigned short field, the size change to 36, but if made
> size of (unsigned short) it return 2.
>
> This is the other "crazy" struct:
>
> typedef struct
> {
> short est;
> short numbe1;
> float dst;
> float Line;
> unsigned long tmp;
> float tmp1;
> float tmp2;
> unsigned long tck;
> unsigned long tl;
> unsigned short dp;
> unsigned short ldact;
> }test;
>
> I'm getting crazy, any idea??
>
>
> Thank you very much for your help.
>
>
>
> The structure is the next:
>
>