Variable in header

[Pabel]

Hi, i'm a little bit confused about variable in header files, for example i writing a library call libra.cpp and libra.h, i know i have to make a pre-declaration of the funtions in libra.h and definition of functions in libra.cpp , but what about variables?, Is it the same for variables? what is the best way?

[Codermik]

Variables in the header file but its good practice to avoid global variables.