#include <string>
#include <stdexcept>
#include <iostream>
using namespace std;

class throwsecond
{
    static int count;
public:
    throwsecond(const string &)
    {
        if (count ++)
        {
            count = 0;
            throw runtime_error("Kaboom!");
        }
        cout << "Constructed\n";
    }
    ~throwsecond()
    {
        cout << "Destructed\n";
    }
};

int throwsecond::count = 0;

class bad_example
{
    throwsecond * a;
    throwsecond * b;
public:
    bad_example(): a(nullptr), b(nullptr)
    {
    }
    bad_example (const string& a,
                 const string& b)
    {
        this->a = new throwsecond(a);
        this->b = new throwsecond(b);
    }
    ~bad_example()
    {
        delete a;
        delete b;
    }
};

class good_example
{
    throwsecond * a;
    throwsecond * b;
public:
    good_example(): a(nullptr), b(nullptr)
    {
    }
    good_example (const string& a,
                  const string& b) : good_example{}
    {
        this->a = new throwsecond(a);
        this->b = new throwsecond(b);
    }
    ~good_example()
    {
        delete a;
        delete b;
    }
};

int main()
{
    cout << "Bad example\n";
    try
    {
        bad_example("", "");
    }
    catch (...)
    {
        cout << "Caught exception\n";
    }
    cout << "Good example\n";
    try
    {
        good_example("", "");
    }
    catch (...)
    {
        cout << "Caught exception\n";
    }
}