模拟多个小球碰撞的VC程序，带有简单说明。由于是网上找到的，没有验证是否可以运行（主要原因是 我们不用这个语言，不知道如何运行，但是编程思路可借鉴）-Simulation of multiple small ball collision VC procedure, with a brief explanation. Because it is found online, there is no verification whether or not to run (mainly because