包含md5实现代码和简单的测试代码。并带有注释，简单易懂。-Contains the md5 code and simple test code. And annotated, easy to understand.

帮别人做的一个信息论哈夫曼程序，通过信源个数，信源权重进行编码，可得到平均码长和编码效率，代码有注释，方便理解。-Someone else to do a theory Huffman program, through the number of sources, source coding weights can be obtained average code length and coding efficiency, code annotated, easy to understand.