program to show hybrid constructor order and in general inheritence constructor order

 #include <iostream>

using namespace std;

class A

{

    int num1;

public:

    A() { cout << "hi from A\n"; }

    A(int num1){

        this-> num1=num1;

        cout<<num1<<endl;

    }

};

class B : virtual public A

{

    int num2,  num3;

public:

B(int num2,int num3){

    this->num2=num2;

    this->num3=num3;

    cout<<num2<<endl;

    cout<<num3<<endl;

}

    B() { cout << "hi from B\n"; }

};

class C : virtual public A

{

    int num4;

public:

    C() { cout << "hi from C\n"; }

    C(int num4){

        this->num4=num4;

        cout<<num4<<endl;

    }

};

class D : public B, public C

{int num5 ;

string name;

public:

    D() { cout << "hi from D\n"; }

    D(int num5,string name,int n1,int n2, int n3,int n4):A(n2),B(n1,n4),C(n2){

        this->num5=num5;

        this->name=name;

        cout<<num5<<endl<<name<<endl;

    }

};

int main()

{

    D b, d(1,"nitin",13,12,15,10);

    return 0;

}