Создать класс Электронное Устройство

#include <iostream>
#include <cstring>
 
class Device
{
    std::string interface;
    int power;
    int weight;
public:
 
    void output_interface() { std::cout<<interface<<std::endl; }
    void output_power()     { std::cout<<power<<std::endl;     }
    void output_weight()    { std::cout<<weight<<std::endl;    }
 
    void input_interface();
    void input_power();
    void input_weight();
 
    void operator()(const char *, int, int);
    Device & operator=(Device &dev);
    friend std::istream & operator>>(std::istream &is, Device &dev);
    friend std::ostream & operator<<(std::ostream &os, Device &dev);
 
    Device(std::string str = "0", int x = 0, int y = 0): interface(str), power(x), weight(y) {}
    ~Device() {}
};

#include "header.h"
 
void Device::input_interface()
{
    std::cout<<"Enter the device interface: ";
    getline(std::cin, interface);
}
 
void Device::input_power()
{
    std::cout<<"Enter the device power: ";
    std::cin>>power;
}
 
void Device::input_weight()
{
    std::cout<<"Enter the device weigth: ";
    std::cin>>weight;
}
 
void Device::operator()(const char *str, int x, int y)
{
    interface = str;
    power     = x;
    weight    = y;
}
 
Device & Device::operator=(Device &dev)
{
    if (this != &dev) {
        interface = dev.interface;
        power     = dev.power;
        weight    = dev.weight;
    }
}
 
std::istream & operator>>(std::istream &is, Device &dev)
{
    return is>>dev.interface>>dev.power>>dev.weight;
}
 
std::ostream & operator<<(std::ostream &os, Device &dev)
{
    return os<<"Interface: "<<dev.interface<<std::endl
                 <<"Power: "    <<dev.power<<std::endl
                 <<"Weight: "   <<dev.weight<<std::endl;
}

#include "header.h"
 
int main()
{
    Device a;
    std::cout<<"---------------\n";
    std::cout<<"Interface: ";
    a.output_interface();
    std::cout<<"Power: ";
    a.output_power();
    std::cout<<"Weight: ";
    a.output_weight();
 
    std::cout<<"---------------\n";
    a.input_interface();
    a.input_power();
    a.input_weight();
 
    std::cout<<"---------------\n";
    std::cout<<a;
 
    Device b;
    b("MP-73-HH-GT-15", 220, 80);
 
    std::cout<<"---------------\n";
    std::cout<<b;
 
    Device c("TP-12-HG-KL-FD", 230, 120);
    std::cout<<"---------------\n";
    std::cout<<c;
 
    std::cout<<"Enter sequentially data through 'Enter': \n";
    std::cin>>c;
 
    std::cout<<"---------------\n";
    std::cout<<c;
 
    c = b;
    std::cout<<"---------------\n";
    std::cout<<c;
 
    return 0;
}