Introduction - If you have any usage issues, please Google them yourself
Experimental Objective: To master the string processing and circulation control description of the problem to achieve the shift Password: k said that 26 letters forward in the number of encryption cycles displacement of characters: Input: k, as well as the lowercase letters that express the output: capital letters expressed ciphertext decryption: Input: k, and uppercase letters of the ciphertext, output: lowercase letters of the plaintext