Caesar-code.rar_out

#include <iostream> #include <conio> const int ABCSize = 26; const char low_ch[] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'}; const char high_ch[] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'}; std::string cipher(const std::string &input_s, const int shift) { bool Ok; std::string output_s(""); for(unsigned i = 0; i < input_s.length(); i++) { Ok = false; for(int j = 0; j < ABCSize; j++) { if (input_s[i] == low_ch[j]) { j += shift; while (j >= ABCSize) j -= ABCSize; while (j < 0) j += ABCSize; output_s += low_ch[j]; Ok = true; break; } else if (input_s[i] == high_ch[j]) { j += shift; while (j >= ABCSize) j -= ABCSize; while (j < 0) j += ABCSize; output_s += high_ch[j]; Ok = true; break; } } if (!Ok) output_s += input_s[i]; } return output_s; } int main() { std::string s; std::cout << "If you want to cipher string, press \"1\", if you want to decode," " press \"2\""; bool Ok = false; int shift = 0; while(!Ok) { switch(getch()) { case '1': { std::cout << "\nInput shift: "; std::cin >> shift; std::cout << "Input string to cipher: "; while (std::cin >> s) { std::cout << cipher(s, shift) << ' '; if (std::cin.get() == '\n') break; } Ok = true; } break; case '2': { bool Done = false; std::cout << "\nInput string to decode: "; getline(std::cin, s); for (int i = 0; i < ABCSize & !Done; i++) { std::cout << "\nWith shift equal " << i << " we have such string:\n"; std::cout << cipher(s, i); std::cout << "\nIf decoding is done, press \"1\""; if (getch() == '1') Done = true; } Ok = true; } break; default: std::cout << "Press either \"1\" or \"2\"!"; } } getch(); }