Structs in C

[n00b]

If I want to fill a descriptiontable, e.g. the IDT, I found it easy to use a struct... but I cant get my structs working in C!
if I do something like this:
struct mystruct {
int yadayada;
};
and then..
mystruct i;
i.yadayada = 5;
I get the error message:
idt.c:6: error: request for member `yadayada' in something not a structure or

how come?

[Pype.Clicker]

your declaration does not alias "mystruct" to the structure. The correct code would be

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   struct mystruct { ...  } ;

    struct mystruct i;
     i.yadayada=5;

[Pype.Clicker]

oh, and btw, beware of compiler alignment of fields ...

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struct IdtRegister {
   word limit;
   dword base;
}

usually has a size of 8, not of 6 as asm programmers could expect.

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struct ldtRegister {
    word padding;
    word limit;
    dword base;
} IDTR;

lidt(&(IDTR.limit));

is to be preferred to the "expectable" code.

[minotaurcomputing]

your declaration does not alias "mystruct" to the structure.

Further, if you in fact wanted to alias mystruct to refer to the structure, then you would have to use typedef.
-m