c++语言实现随机出现小球，底部有个类似炮筒可以射击小球，调节速度和角度。-Realize the c++ language randomly appear small balls, the base has a similar cannon muzzles can shoot ball, adjust speed and point of view.

通过C++编译，实现了大炮打飞机的游戏。-By c++ compiler to achieve the cannon dozen game of the plane.