本加密器每次从要加密的文件中读取出一个字符，对其进行取反运算。由于是取反加密，解密不用写专门的解密函数，只需对文件再进行一次加密，即可恢复成明文。-Each time the encoder to read the encrypted file to a character, its the negation operator. Because it is taking anti-encryption, decryption, decrypt without having to write a special function, just encrypt the file once again, you can revert to plain text.