#include <iostream>
using namespace std;

//==============
// КЛАСС Device
//==============
class Device {
private:
    string name, manufacturer;
    int power;
public:
    Device();
    void Device_input();
    void Device_print();
};

// методы
Device::Device() {
    power = 0;
}

void Device::Device_input() {
    cout << "Введите имя:" << endl;
    cin >> name;
    cout << "Введите производителя:" << endl;
    cin >> manufacturer;
    cout << "Введите мощность:" << endl;
    cin >> power;
}

void Device::Device_print() {
    cout << "name = " << name << endl;
    cout << "manufacturer = " << manufacturer << endl;
    cout << "power = " << power << endl;
}

//==============
//==============
//==============

class Sound {
private:
    int volume, frequency;
public:
    Sound();
    void Sound_input();
    void Sound_print();
};

// методы
Sound::Sound() {
    volume = frequency = 0;
}

void Sound::Sound_input() {
    cout << "Введите громкость:" << endl;
    cin >> volume;
    cout << "Введите частоту:" << endl;
    cin >>  frequency;
}

void Sound::Sound_print() {
    cout << "volume = " << volume << endl;
    cout << "frequency = " << frequency << endl;
}

class Siren : public Device, public Sound {};

int main()
{
    Siren S;
    S.Device_input();
    S.Sound_input();
    S.Device_print();
    S.Sound_print();
}