Data structure gives error LNK2001

[Constipator]

Greetings,

I'm having issues with constructing structures. I am using the SFML library, but that doesn't seem to be the issue. This is the code that cause me problems:

struct main_variables{
public:
	static sf::RenderWindow main_variables::application;
	static int main_variables::seconds;
	static sf::Sound main_variables::clock_ticking_1;
};

Output:

1>main.obj : error LNK2001: unresolved external symbol "public: static class sf::Sound main_variables::clock_ticking_1" (?clock_ticking_1@main_variables@@2VSound@sf@@A)
1>main.obj : error LNK2001: unresolved external symbol "public: static class sf::RenderWindow main_variables::application" (?application@main_variables@@2VRenderWindow@sf@@A)
1>main.obj : error LNK2001: unresolved external symbol "public: static int main_variables::seconds" (?seconds@main_variables@@2HA)

I tried looking up this error (LNK2001: unresolved external symbol) on Google, and it seems to be a common issue. However, that didn't help me, and now I am stuck :(

Any help will be appreciated.

[Dy7SLyTq]

it looks like you arent linking to the libraries right. did you do them in the correct order?

[jlb]

Where do you initialize these static variables?

[Constipator]

@DTSCode: They should be linked in the right order...
@jlb:

#include <iostream>
#include <SFML\Graphics.hpp>
#include <SFML\Window.hpp>
#include <SFML\Audio.hpp>
#include <SFML\System.hpp>
using namespace std;

struct main_variables{
public:
	static sf::Sound main_variables::clock_ticking_1;
	static sf::RenderWindow main_variables::application;
	static int main_variables::seconds;
	
};

int main(){
// main variables
	main_variables m;
	m.seconds = 0;
// ...
}

This is all inside main.cpp. At the moment there are no other cpp, or h files.

[Dy7SLyTq]

theyre static so i think you have to initialize them in the struct

[Constipator]

I have fiddled around a bit more with the code I had, and removed the static keyword from the initializations of the 3 variables in the structure main_variables. However, this gives me a SFML related error. I will ask for help on the SFML forum.