---

int CIPHER() {
    system("cls");
    info();

    cout << "===========================================================\n";
    cout << "                     ШИФРОВАНИЕ/ДЕШИФРОВАНИЕ              \n";
    cout << "===========================================================\n\n";

    string text, original;
    cout << "Введите текст: ";
    if (!ReadStringWithESC(text)) return 0;
    original = text;
    
    int method = 0, shift = 3;
    bool encrypted = false;
    char ch;
    
    do {
        system("cls");
        info();
        cout << "\n===========================================================\n";
        cout << "Текст: " << text << "\n";
        cout << "===========================================================\n";
        
        if (!encrypted) {
            cout << "1 - Цезарь\n2 - Побитовый\n3 - Динамический\n0 - Выход\n";
        } else {
            cout << "4 - Расшифровать\n5 - Сброс\n0 - Выход\n";
        }
        cout << "Выбор: ";
        
        ch = _getch(); cout << ch << endl;
        
        if (ch == '0') break;
        
        if (!encrypted) {
            string res = text;
            int len = text.length();
            
            if (ch == '1') {
                cout << "Введите сдвиг: ";
                if (!ReadIntWithESC(shift)) return 0;
                for (int i = 0; i < len; i++)
                    if (isalpha(res[i])) {
                        char base = isupper(res[i]) ? 'A' : 'a';
                        res[i] = base + (res[i] - base + shift) % 26;
                    }
                text = res;
                method = 1;
                encrypted = true;
            }
            else if (ch == '2') {
                if (len == 0) continue;
                unsigned char* tmp = new unsigned char[len+1];
                for (int i = 0; i < len; i++) tmp[i] = text[i];
                tmp[len] = 0;
                unsigned char first = (tmp[0] & 0x80) >> 7;
                for (int i = 0; i < len; i++) {
                    unsigned char next = (i < len-1) ? (tmp[i+1] & 0x80) >> 7 : first;
                    tmp[i] = (tmp[i] << 1) | next;
                    res[i] = tmp[i];
                }
                text = res;
                method = 2;
                encrypted = true;
                delete[] tmp;
            }
            else if (ch == '3') {
                for (int i = 0; i < len; i++)
                    if (isalpha(res[i])) {
                        char base = isupper(res[i]) ? 'A' : 'a';
                        res[i] = base + (res[i] - base + i + 1) % 26;
                    }
                text = res;
                method = 3;
                encrypted = true;
            }
        }
        else {
            string res = text;
            int len = text.length();
            
            if (ch == '4') {
                if (method == 1) {
                    cout << "Введите сдвиг: ";
                    if (!ReadIntWithESC(shift)) return 0;
                    for (int i = 0; i < len; i++)
                        if (isalpha(res[i])) {
                            char base = isupper(res[i]) ? 'A' : 'a';
                            res[i] = base + (res[i] - base - shift + 26) % 26;
                        }
                    text = res;
                }
                else if (method == 2) {
                    if (len == 0) continue;
                    unsigned char* tmp = new unsigned char[len+1];
                    for (int i = 0; i < len; i++) tmp[i] = text[i];
                    tmp[len] = 0;
                    unsigned char lastBit = (tmp[len-1] & 1);
                    for (int i = len-1; i >= 0; i--) {
                        unsigned char prevBit = (i > 0) ? (tmp[i-1] & 1) : lastBit;
                        tmp[i] = (tmp[i] >> 1) | (prevBit << 7);
                        res[i] = tmp[i];
                    }
                    text = res;
                    delete[] tmp;
                }
                else if (method == 3) {
                    for (int i = 0; i < len; i++)
                        if (isalpha(res[i])) {
                            char base = isupper(res[i]) ? 'A' : 'a';
                            res[i] = base + (res[i] - base - (i + 1) + 26) % 26;
                        }
                    text = res;
                }
                encrypted = false;
                method = 0;
            }
            else if (ch == '5') {
                text = original;
                encrypted = false;
                method = 0;
            }
        }
    } while (true);
    
    return 0;
}