#include <iostream>
#include <stdexcept>

using namespace std;

int main()
{
    Adress a1{};
    a1.print();
    cout << endl;
    Adress a2{192, 16, 0, 1};
    a2.print();
    cout << endl;
    try
    {
	Adress a3{256, 0, 0, 0};
    }
    catch(logic_error const& e)
    {
	cout << e.what()<< endl;
    }
    try
    {
	Adress a4{255, -1, 0, 0};
    }
    catch(logic_error const& e)
    {
	cout << e.what()<< endl;
    }
}