本程序包为跷跷板小车兼有循迹和避障功能，有前进循迹程序模块、有后退循迹程序模块、跷跷板平衡程序模块、 避障程序模块及显示程序模块组成-The package for both seesaw car tracking and obstacle avoidance function, forward tracking program modules, there are back tracking program modules, program modules seesaw balance, ob