Introduction - If you have any usage issues, please Google them yourself
1) to create a Crypto project and Decrypto project, which realize the text file encryption and decryption function
2） 在D盘下新建一个名为”src.txt”的文件，在该文件中输入任意字符；编译运行Crypto，对文件src.txt进行加密，加密后的文件名为out.txt，加密密钥为“123456”；打开加密后的文件，观察文件内容是否加密，编译并运行Decrypto，对文件out.txt进行解密，解密文件命名为desrc.txt，解密密钥和加密密钥相同；打开解密后的文件，查看内容是否和加密前的内容一致。
2) create a named "src.txt" file in the D disk, enter any characters in the file the file compile and run Crypto, src.txt encryption, encrypted file named out.txt, the encryption key is "123456" open the encrypted files, look at the contents of the file is encrypted, compile and run the Decrypto, to decrypt the file out.txt, decrypt the file named desrc.txt, the decryption key and encryption key the same open the decrypted files, see whether the content and the pre encrypted content.