(C) How do I share variables between different .c files?

http://stackoverflow.com/questions/1045501/how-do-i-share-variables-between-different-c-files

In fileA.c:

int myGlobal = 0;

In fileA.h

extern int myGlobal;

In fileB.c:

#include "fileA.h"
myGlobal = 1;

So this is how it works:

• the variable lives in fileA.c
• fileA.h tells the world that it exists, and what its type is (int)
• fileB.c includes fileA.h so that the compiler knows about myGlobal before fileB.c tries to use it.