本算法实现了圆周率PI的求解（在正方形区域内随机产生大量的均匀分布的点，落入内切圆和正方形中的随机点个数的比值乘以4，即为PI值）与求解的动态可视化过程(This algorithm is used to solve PI PI (in a square region to generate a large number of random uniform distribution, the ratio of the number of random points fall into the c