QuickHit游戏考验你键盘输入的速度和准确性，设计该游戏时运用面向对象的方法，具体类实现抽象类，抽象方法，子类继承父类等。-QuickHit games will test your keyboard speed and accuracy, the design of the game to use object-oriented approach, the specific class implements the abstract class, abstract method, the