How to create a 'static' variable for a struct in C

Question

I would like to have a struct that functions like this:

struct

I am aware that the static keyword does not do this. My question is, how can I mimic this behavior?

Could I create a member that is pointer to a global variable?

Is there some other better way to do this?

If the member is common to all `structs` why include it as a member? — Weather Vane, Nov 05 '15 at 20:41
I'm not sure you can, it is not object oriented. You cannot do `struct::static_member` in C. — SomethingSomething, Nov 05 '15 at 20:42
Check this thread: http://stackoverflow.com/questions/6013373/c-usage-of-static-within-a-struct — SomethingSomething, Nov 05 '15 at 20:43

score 3 · Answer 1 · answered Nov 05 '15 at 21:28

3

Unlike structs in C++ which can have static data members, C structs don't have such a construct.

Since this is a common value for anyone that may use it, just declare it as a global:

int my_struct_common_val = 42;

struct my_struct {
    ...
};

answered Nov 05 '15 at 21:28

dbush

1

If this is in a header file then you will need to use `extern int my_struct_common_val;` with definition in exactly one `.c` file – M.M Nov 05 '15 at 21:47

1 Answers1