自己写的个DES加密，解密文件的源代码， 用C++写的，工具是 visual studio 2010-Himself wrote a DES encryption and decryption files of source code, written using C++, visual studio 2010 tools

QT版本 4.7 可以加密，解密任何格式的文件，因为是基于位加密的，采用的算法是DES-QT version 4.7 to encrypt, decrypt files of any format, because it is based on bit encryption, using DES algorithm is