DES加解密代码，经过优化，含有测试用例-DES encryption and decryption code, optimized, containing test cases

组成原理实验 编写微程序和指令程序（十六进制代码） 经过实验课的测试 里面含有实验ppt和要求-an important experiment of the course Principles of Computer Organization ，to write code about Microprogram and Instruction program