best way to declare struct to be used in other c and c++ files

[Tammy]

Hello all,

I am wondering what is the best way to declare a struct to be used in
other c and c++ files. Such as for a C API that will be used by
others.

1. Declaring the typedef and the struct in the header file and
including this file in all source files that need it? For example:

mystruct.h

typedef mystruct mystruct_t;

struct mystruct {
int x;
char c;
};

-OR-
2. Declaring the typedef in a header file and declaring the struct in
the .c file ( I am not certain that this will work). For example:

mystruct.h

typedef mystruct mystruct_t;
mystruct.c

#include "mystruct.h "

struct mystruct {
int x;
char c;
};

......(other code using the structure)

-OR-

3. Other methods??

Thanks in advance for your help,
Tammy

[pete]

Peter Nilsson wrote:

pete <pfil...@mindsp ring.comwrote:

>...The proper use of of the e_type interface,
is to define at least these three macros in a header file,
(there may be other macros depending on the sort algorithm)
for sorting functions which can then be used to sort
arrays of elements of any type, including arrays of arrays:

#define E_TYPE
#define MOV(A, B)
#define GT(A, B)

I prefer to make the configurable components of the sort
template functions as macro parameters. [The following is
just proof of concept. File break up requires (re)insertion
of include guards and other details.]
%type sort.c
/* --------- */
/* pp_util.h */
/* --------- */
#define pp_cat(a, b) a ## b
#define pp_concat(a, b) pp_cat(a, b)

#define pp_t(T) pp_concat(T, _t)
typedef int int_t; /* and the rest */

#define pp_lt(a, b) ((a) < (b))
#define pp_assign(a, b) ((a) = (b))
#define pp_memcpy(a, b) memcpy(a, b, sizeof(a))

Thank you.
I'll give it a good look.
--
pete