inheritance

#include <iostream>

class Parent
{
    int id;

public:
    Parent(int idP)
        : id{ idP }
    { std::cout << "Parent constructed for " << this << " with id = " << id << '\n'; };
    Parent() : Parent{ 0 } {};
    ~Parent() { std::cout << "Parent destructed for " << this << " with id = " << id << '\n'; }
    int getId() const { return id; };
    Parent& setId(int idP) { id = idP; return *this; };
};

class Child : public Parent
{
    int val;
public:
    Child(int valP, int idP)
        : Parent{ idP }, val{ valP }
    {
        std::cout << "Child constructed for "
            << this << " with id = " << getId() << " val = " << val << '\n';
    };
    Child() : Child{ 0, 0 } {};
    ~Child()
    {
        std::cout << "Child destructed for "
            << this << " with id = " << getId() << " val = " << val << '\n';
    }
};
int main()
{
    std::cout << "Parent...\n";
    Parent p;
    std::cout << "Child...\n";
    Child c;
}