Hi,
As someone already said.....
typedef is to just decrease ur typing effort...
say i have a structure like
struct MYSTRUCTUREDEFINITION
{
// some variable declaration
};
typedef struct MYSTRUCTUREDEFINITION mystdef;
Now if i want to declare a variable i can say in two
ways;
struct MYSTRUCTUREDEFINITION myVar; (or)
simply
mystdef myVar;
I think u got the use of typedef.......
--- Fernando Arturo G�mez Flores
<[EMAIL PROTECTED]> wrote:
>
>
>
> > Hi guys,
> >
> >
> > I have some doubt about Typedef and Swpping
> pointers..
> >
> > Why we r using typedef for stucture...Ex.
> >
> > typedef struct muthu{
> > int a;
> > int b;
> > }good;
> >
> > void main()
> > {
> > good *a1;
> >
> > a1= (good*) mallloc(muthu);
> >
> > }
> >
> >
> > My question is y we are using typedef for structre
> is there any particular
> use?
> >
> >
> > 2. How we can swap the pointer variable without
> third variable;
> >
> For your question 1, as far as I know, in pure C,
> the complete type of your
> structure is "struct muthu". Hence if you want to
> use it in a function,
> you'll have to declare the parameter as struct
> muthu:
>
> void anyFunction(struct muthu* pParam)
> {
> // whatever
> }
>
> If you use a typedef, then you get a strongly typped
> shortcut:
>
> typedef struct muthu good;
>
> void anyFunction(good* pParam)
> {
> // whatever
> }
>
> Now, recall the "strongly typped" phrase. Although
> they have the same size
> and members, they are different types.
>
> Regards,
> Fernando Gomez.
>
>
>
>
>
>
>
>
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