ALLEGRO_VERSION - Defined to the major version of Allegro.

       Defined  to the major version of Allegro. From a version number like 4.1.16, this would be defined to the
       integer 4.

Allegro                                           version 4.4.3                         ALLEGRO_VERSION(3alleg4)

       ALLEGRO_VERSION - Defined to the major version of Allegro.

#include<allegro.h>#defineALLEGRO_VERSION