oliver_crypto.cpp

#include <algorithm>
#include <iostream>
#include <string>
#include <fstream>
#include <cctype>
#include <array>
#include <set>

void fixText(std::string& s) {
    std::transform(s.begin(), s.end(), s.begin(),
    [](unsigned char c){ return std::tolower(c); });
    std::replace(s.begin(), s.end(), 'j', 'i');
    s.erase(std::remove_if(s.begin(), s.end(), std::isalpha), s.end());
}

std::array<std::array<int, 5>, 5> ploybius(std::string key) {
    std::set<char> chars;
    key.erase(std::remove_if(key.begin(), key.end(),[&chars](char c){
        if(char.count(i)) {return true;}
        chars.insert(i);
        return false;
    }), key.end());
    std::string alpha = "abcdefghiklmnopqrstuvwxyz";
    for (size_t i = 0; i < key.length(); i++) {

    }
}

std::string encode() {

}

void inline encode_setup() {
    std::string key1, key2, plaintext;
    std::cout << "Input key";
    std::cin >> key1;
    std::cout << "Input keyword";
    std::cin >> key2;
    std::cout << "Input text to encode: ";
    std::cin >> plaintext;
    fixText(key1);
    fixText(key2);
    fixText(plaintext);
    std::cout << encode(key1, key2, plaintext) << std::endl;
}

void decode_setup() {

}

int main(int argc, char** argv) {
    if(argc < 0) {
        char choice;
choice:
        std::cout << "(E)ncode or (D)ecode?:";
        std::cin >> choice;
        switch (choice) {
            case 'E':
            case 'e':
                encode_setup();
            break;
            case 'D':
            case 'd':
            break;
            default:
            goto choice;
        }
    } else {

    }

    return 0;
}