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al_get_num_joysticks - Allegro 5 API
#include <allegro5/allegro.h> int al_get_num_joysticks(void)
Return the number of joysticks currently on the system (or potentially on the system). This number can change after al_reconfigure_joysticks(3alleg5) is called, in order to support hotplugging. Returns 0 if there is no joystick driver installed.