该DES加密器实现了一重DES的五种加密模式，即ECB、CBC、CFB、OFB、CRT。
为了减小文件长度，已删除了Debug目录，解压缩后可以自行编译生成。(The DES encrypt implements five encryption modes of a heavy DES, namely, ECB, CBC, CFB, OFB, and CRT.　　　　　　
In order to reduce the length of the file, the Debug directory has been deleted, and it can be compiled and generated by itself after the decompression.)