Exer18_30.cpp

// Warning: this is for verification and illustration.
#include <iostream>
class Class {
public:
    Class() { std::cout << "Class()" << std::endl; }
};
class Base : public Class {
public:
    Base() : Class(), ival(0) { std::cout << "Base()" << std::endl; }
    Base(const Base&) = default;
    Base(int i) : Class(), ival(i) {}
protected:
    int ival;
};
class D1 : public virtual Base {
public:
    D1() { std::cout << "D1()" << std::endl; }
    D1(const D1 &d) : Base(d) { }
    D1(int i) : Base(i) {}
};
class D2 : public virtual Base {
public:
    D2() { std::cout << "D2()" << std::endl; }
    D2(const D2 &d) : Base(d) { }
    D2(int i) : Base(i) {}
};
class MI : public D1, public D2 {
public:
    MI() { std::cout << "MI()" << std::endl; }
    MI(const MI &mi) : Base(mi), D1(mi), D2(mi) {}
    MI(int i) : Base(i), D1(i), D2(i) {}
};
class Final : public MI, public Class {
public:
    Final() { std::cout << "Final()" << std::endl; }
    Final(const Final &fi) : Base(fi), MI(fi), Class() {}
    Final(int i) : Base(i), Class() {}
};
int main()
{
    Final fi;
    std::cout << std::endl;
    Final fi2 = fi;
    return 0;
}