How is a parent constructor called in C++?

Question

C++ / C#

How to rewrite this code https://ideone.com/NE6NEW to C++?
I really don't understand how it's possible to do something like this :(

Answer 1

In C++, you need to separately implement the child constructor

class Base {
    public:
    Base(int _i): i(_i) {//блок инициализации
    }
    private: 
    int i;
}

class Derived : public Base {
    public:
    Derived(int _i): Base(_i) { //зовём super конструктор
    }
}