Before the compilation the script is preprocessed. You can place some directives, that change the default code. There are currenltly two directives : aliases and includes. All preprocessor directives starts with # sign.
Alias is defined with #alias command. The first argument is a word to be replaced, the second one is a word that replaces the first one.
...
#alias MAX_HEALTH 100
if(health < MAX_HEALTH)
SearchForMedkit();
...
Let common.sc file contain:
... #alias MAX_HEALTH 100 ...
The main file that includes common.sc
...
#include "common.sc"
if(health < MAX_HEALTH)
SearchForMedkit();
...