模拟大炮打飞机。在GUI界面上，飞机水平飞行，用界面上的按钮控制大炮的运行方向（如向左，向右，向上，向下）。当炮弹碰着飞机后，飞机坠落。--Analog artillery hit the aircraft. On the GUI interface, the aircraft in level flight, with the running direction buttons to control the cannon on the interface (such as left, righ