Introduction - If you have any usage issues, please Google them yourself
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