用C++实现加密与解密,包括对文本内容的加密解密、图片的加密解密、DES加密,里面有详细的代码、注释及相关原理等,是一份完整的实验报告。(Encryption and decryption with C++, including encryption and decryption of text content, encryption and decryption of pictures, DES encryption, which has detailed code, notes and re