[CaptainMactavish]

pawn Код:

#define IsVehicleOccupied(%0) VehicleOccupied[%0]

new bool:VehicleOccupied[MAX_VEHICLES char];
public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate == PLAYER_STATE_DRIVER) VehicleOccupied[GetPlayerVehicleID(playerid)] = true;
    else if(oldstate == PLAYER_STATE_DRIVER) VehicleOccupied[GetPlayerVehicleID(playerid)] = false;
}

stock VerifyVehicleDriver()
{
    new count;
    for(new v=0; v<MAX_VEHICLES; v++)
    {
        if(IsVehicleOccupied(v)) count++;
    }
    return count;
}