calibrate_joystick - Calibrates the specified joystick. Allegro game programming library.

       Most  joysticks need to be calibrated before they can provide full analogue input. This function performs
       the next operation in the calibration series for the specified stick, assuming that the joystick has been
       positioned in the manner described by a previous call to  calibrate_joystick_name(),  returning  zero  on
       success. For example, a simple routine to fully calibrate all the joysticks might look like:

          int i;

          for (i=0; i<;num_joysticks; i++) {
             while (joy[i].flags & JOYFLAG_CALIBRATE) {
                char *msg = calibrate_joystick_name(i);
                textprintf_ex(..., "%s, and press a key\n", msg);
                readkey();
                if (calibrate_joystick(i) != 0) {
                   textprintf_ex(..., "oops!\n");
                   readkey();
                   exit(1);
                }
             }
          }

       calibrate_joystick - Calibrates the specified joystick. Allegro game programming library.

       Returns zero on success, non-zero if the calibration could not be performed successfully.

install_joystick(3alleg4),    calibrate_joystick_name(3alleg4),   joy(3alleg4),   num_joysticks(3alleg4),
       exjoy(3alleg4)

Allegro                                           version 4.4.3                      calibrate_joystick(3alleg4)

#include<allegro.h>intcalibrate_joystick(intn);