基于VC6.0上编写的C++版DES程序，方便易读，以其简洁的特色解决实际问题，反映了代码的高质量-Based the VC6.0 written C++ Edition DES program to facilitate the easy-to-read its simple features to solve practical problems, reflect the high quality of the code

测试驱动开发，英文全称Test-Driven Development，简称TDD，是一种不同于传统软件开发流程的新型的开发方法。它要求在编写某个功能的代码之前先编写测试代码，然后只编写使测试通过的功能代码，通过测试来推动整个开发的进行。这有助于编写简洁可用和高质量的代码，并加速开发过程。-Test-driven Development, English full name Test- Driven Development, hereinafter referred to as TDD, is a