chechikov - kruto :/

#include <iostream>
#include <string>
#include <map>

using namespace std;

string normalize(string str, int mode) {
    //modes:
    //0 - To lower
    //1 - To upper
    for (int i = 0; i < str.size(); i++) {
        switch (mode) {
        case 0: {
            str[i] = tolower(str[i]);
            break;
        }
        case 1: {
            str[i] = toupper(str[i]);
            break;
        }
        default: {
            i = str.size();
        }
        }
    }
    return str;
}

int main() {
    const string ENstrAlphabet = "abcdefghijklmnopqrstuvwxyz";

    string message, key, subAlphabet;
    subAlphabet = ENstrAlphabet;
    map<char, char> Alphabet;

    cout << "ENTER YOUR MESSAGE:\n";
    getline(cin, message);

    cout << "ENTER THE KEY:\n";
    cin >> key;

    //creating subAlphabet
    for (char i : key) {
        subAlphabet.erase(subAlphabet.begin() + subAlphabet.find(i));
    }
    subAlphabet = key + subAlphabet;

    for (int i = 0; i < ENstrAlphabet.size(); i++) {

    }
    //

    //normalizing
    message = normalize(message, 0);
    subAlphabet = normalize(subAlphabet, 1);
    //

    //creating Alphabet map
    for (int i = 0; i < subAlphabet.size(); i++) {
        Alphabet.insert(pair<char, char>(ENstrAlphabet[i], subAlphabet[i]));
    }

    //!adding space to the alphabet
    Alphabet.insert(pair<char, char>(' ', ' '));
    //


    //encode
    for (int i = 0; i < message.size(); i++) {
        message[i] = Alphabet[message[i]];
    }
    //

    cout << " " << endl;
    cout << "ENCODE\n\n" << "Alphabet:\n"<< endl;
    cout << '-' << ENstrAlphabet << endl;
    cout << '+' << subAlphabet << endl;
    cout << " " << endl;
    cout << message << endl;

    //decode
    for (int i = 0; i < message.size(); i++) {
        for (char k : ENstrAlphabet) {
            if (Alphabet[k] == message[i]) {
                message[i] = k;
                break;
            }
        }
    }
    //O(n^2)

    cout << " " << endl;
    cout << "DECODE\n\n" << "Alphabet:\n" << endl;
    cout << '-' << subAlphabet << endl;
    cout << '+' << ENstrAlphabet << endl;
    cout << " " << endl;
    cout << message << endl;

    system("pause");
    return 0;
}