编写简单的加密程序它把一个文件的所有字母按下列规律进行 换，非字母的字符保持不变。文本可以自行创建，文件名可以自定 转换规律：‘A’→‘Z’，‘B’→‘Y’，• • -The preparation of a simple encryption program it to a file of all the letters according to the following rules of conduct for non-letter characters