说明：  一个C++的DES算法源码.引入工程中即可使用，加解密的函数分别是DES(char *key,char *s_text,char *d_text)和_DES(char *key,char *s_text,char *d_text) 使用上也比较方便
(A C++ Source of the DES algorithm. The introduction of projects to use, a function of encryption and decryption are DES (char* key, char* s_text, char* d_text) and _DES (char* key, char* s_text, char* d_text) is also more convenient to use)