Introduction - If you have any usage issues, please Google them yourself
1) C \ C++ language to achieve a single table Affine (Affine) encryption/decryption algorithm
2) C \ C++ language statistics program 26 English letters appear frequency
3) Using a single table affine encryption/decryption program for a longer period of English articles is encrypted, and then the frequency plaintext and ciphertext letters appear in statistics and for comparison, to observe what is the law.