C++可以初始化基类的基类吗？

#include <iostream>

class BaseBase {
public:
    BaseBase() {
        std::cout << "BaseBase constructor" << std::endl;
    }
};

class Base : public BaseBase {
public:
    Base() {
        std::cout << "Base constructor" << std::endl;
    }
};

class Derived : public Base {
public:
    Derived() {
        std::cout << "Derived constructor" << std::endl;
    }
};

int main() {
    Derived d;
    return 0;
}

BaseBase constructor
Base constructor
Derived constructor