Thread: #define for constants?

I have a bunch of constants:

Code:

const int SCREEN_WIDTH = 500;
const int SCREEN_HEIGHT = 500;

const int MAZE_WIDTH = 21;
const int MAZE_HEIGHT = 21;

const int TILE_SIZE = 50;

Which are required by a couple of my source files.
How do I share them with my source files?

Do I make a headerfile with #define statements eg. #define SCREEN_WIDTH 500

Or do I make a headerfile with them defined as static variables?

Or do I make a headerfile with them declared as extern variables and define them in another source file?