Thread: declaring a structure in another headerfile

I'm not sure what your question is, but declarations of structures are identical whether they are in a header-file or not. Your image is a bit hard to read on my machine, because of the dark brown text being hard to read against a black background - I expect you have less room -light than I do.

You need to include the appropriate header-file in any other file that uses the structure [or include it in a header-file before the header-file that uses the structure, but that's less flexible and puts more strain on the programmer to make sure all header files are always in the right order - correctly written header files should only allow themselves to be included once by using include-guards].

--
Mats

When you declare an instance of a structure in C (C++ is different), you have to use the struct keyword.

Code:

struct s_t {
    int x;
};

struct s_t thestruct;

Unless typedef or some such is used, then you need not.

Code:

typedef struct {
    int x;
} s_t;

s_t thestruct;

Since there's no typedef in your structure definition, you'll need the "struct" keyword.

Are you sure you're ready for socket/networking programming? It can be tougher than it looks, and if you don't know how to declare structures . . . .

Perhaps you should look at these.

Structures tutorial: http://www.cprogramming.com/tutorial/c/lesson7.html
Introduction to sockets: http://beej.us/guide/bgnet/

Note that if you don't know, main should return int, so it shouldn't be "main", it should instead be "int main."

It's not any different. Just include the header file and use it as normal.