用C\C++语言实现仿射变换（Affine）加/解密算法；2）用C\C++语言实现统计26个英文字母出现的频率的程序；3）利用仿射变换加/解密程序对一段较长的英文文章进行加密，再利用统计软件对明文和密文中字母出现的频率进行统计并作对比，观察有什么规律-With C \ C++ language affine transformation (Affine) encryption/decryption algorithms　2) C \ C++ language programs frequency statistics 26 English letters appear　and 3) the use of the affine transformation encryption/decryption program for a longer period English articles are encrypted, and then use statistical software for frequency plaintext and ciphertext letters appear for statistical and for comparison, observe what the law