使用VC++实现香农编码的功能，简单好用-Use VC++ coding to achieve the Shannon function, simple and easy to use

香农编码代码，霍夫曼编码等各种编码代码，适用于图像处理，信息论等各种学科实验报告(Shannon coding code, Hoffman encoding and other coding code, suitable for image processing, information theory and other disciplines experimental report)