简单的RSA加解密练习，使用公钥进行加密，使用私钥进行解密。-Simple RSA encryption and decryption of the exercises, using the public key is encrypted using the private key to decrypt.

这是c++做的RC4算法的练习，在visu1c++6.0能够正常运行，做了输出测试。可以多多了解其内部状态-The RC4 algorithm exercises do c++ be able to properly run in visu1c++6.0 output test. Can be a lot of understanding of its internal state