水平有限，请高手们指点一下哪里可以改进，或者有更好的方法-limited, and 19:56 gets advice on where they can improve, or there is a better way

该程序实现了算术编码的编译码，并得到随机信源的输出码字和编码效率。-The program achieves the encoding and decoding of arithmetic coding, and gets the output code words and coding efficiency of the random sourse.