飞行员等级考试游戏。参考经典的"是男人就撑过２０秒plane"写了个小游戏作为教程，有点难度，涉及到类的一般操作，如编写类、类的继承等。-Pilot rating exam game. Reference to the classic "man to get through 20 seconds plane," wrote a little game as a tutorial and a bit difficult, related to the general operation of th