Typedef - multiple declarations

[Dave]

Hi all,

I was wondering if when I use the typedef command, I can typedef multiple names.

EX)

typedef struct foo {
foo *next;
foo *prev;
int val;
} nameOne, nameTwo;

Can I now use nameOne and nameTwo interchangeably ?

Dave

[Ben Pfaff]

da**********@ya hoo.com (Dave) writes:

I was wondering if when I use the typedef command, I can typedef multiple names.
`typedef' is not a command. C does not have commands. `typedef'
is syntactically, but not semantically, a storage class
specifier.

Yes, you can declare multiple typedef names in a single
declaration.
typedef struct foo {
foo *next;
foo *prev;
Unless you already typedef `foo', those two declarations will
need to be written `struct foo *', not `foo *'.
int val;
} nameOne, nameTwo;

Can I now use nameOne and nameTwo interchangeably ?

Yes. As C99 6.7.7 says, "A typedef declaration does not
introduce a new type, only a synonym for the type so specified."
--
int main(void){char p[]="ABCDEFGHIJKLM NOPQRSTUVWXYZab cdefghijklmnopq rstuvwxyz.\
\n",*q="kl BIcNBFr.NKEzjwC IxNJC";int i=sizeof p/2;char *strchr();int putchar(\
);while(*q){i+= strchr(p,*q++)-p;if(i>=(int)si zeof p)i-=sizeof p-1;putchar(p[i]\
);}return 0;}

[CBFalconer]

Dave wrote:

I was wondering if when I use the typedef command, I can typedef
multiple names. EX)

typedef struct foo {
foo *next;
foo *prev;
int val;
} nameOne, nameTwo;

Can I now use nameOne and nameTwo interchangeably ?

Yes, but why would you want to? However it might be useful to
make that:

} nameOne, *nameOnePtr;

and you probably need to replace "foo" by "struct foo" within the
definition, unless foo refers to something else entirely.

--
Chuck F (cb********@yah oo.com) (cb********@wor ldnet.att.net)
Available for consulting/temporary embedded and systems.
<http://cbfalconer.home .att.net> USE worldnet address!

[Micah Cowan]

da**********@ya hoo.com (Dave) writes:

Hi all,

I was wondering if when I use the typedef command, I can typedef multiple names.

EX)

typedef struct foo {
foo *next;
foo *prev;
int val;
} nameOne, nameTwo;

Can I now use nameOne and nameTwo interchangeably ?

Yup.

-Micah