Translate C++ to D

[Luca Lupo]

I would like to thank all the answers, you are very available. Now I have to start converting the files. Cpp and I hope that you can continue to help.

This is the first file: observer.cpp, any suggestions?

//Observer.cpp

#include<iostream>
#include<string> 
#include"Subject.h" 
using namespace std;

Observer::~Observer()
{}

Observer::Observer()
{}

SubscriberG::SubscriberG(string a){
     indirizzo_e_mail_G = a;
}

SubscriberS::SubscriberS(string a,string b){
     indirizzo_e_mail_S = a;
     name_author = b;
}


void Observer::Update(Subject* b)
{}

void Subscriber::Update(Subject* b)
{}

void SubscriberS::Update(Subject* b){
     if (name_author == ((Blog *)b)->GetAuthor()){
        cout<<"Subscriber tipo S->"<<"Name blog: "<<((Blog *)b)->GetName()<<endl;
        ((Blog *)b)->GetTitle();
        ((Blog *)b)->GetText();
        cout<<"Autore Ultimo Post :"<<((Blog *)b)->GetAuthor();
        cout<<endl<<endl;
     }
}

void SubscriberG::Update(Subject* b){
     cout<<"Subscriber tipo G->"<<"Name blog: "<<((Blog *)b)->GetName()<<endl;
     ((Blog *)b)->GetTitle();
     ((Blog *)b)->GetLine();
     cout<<"Autore Ultimo Post :"<<((Blog *)b)->GetAuthor();
     cout<<endl<<endl;
}



//Observer.d

import std.string;
import Subject

Observer::~this() //distructor for observer
{}

Observer::this() // costructor for observer
{}

SubscriberG::this(string a) //contructor for subscriberG
{indirizzo_e_mail_G = a;}

SubscriberS::this(string a,string b) //contructor for subscriberS
{
    indirizzo_e_mail_S = a;
    name_author = b;
}


void Observer::Update(Subject* b) //it's equal? for me yes!
{}

void Subscriber::Update(Subject* b) //it's equal? for me yes!
{}

void SubscriberS::Update(Subject* b) //Help??
{
    if(name_author == ((Blog *)b)->GetAuthor()){
cout<<"Subscriber tipo S->"<<"Name blog: "<<((Blog *)b)->GetName()<<endl;
((Blog *)b)->GetTitle();
((Blog *)b)->GetText();
cout<<"Autore Ultimo Post :"<<((Blog *)b)->GetAuthor();
                                               }
cout<<endl<<endl;
}

void SubscriberG::Update(Subject* b) //Help??
{
cout<<"Subscriber tipo G->"<<"Name blog: "<<((Blog *)b)->GetName()<<endl;
((Blog *)b)->GetTitle();
((Blog *)b)->GetLine();
cout<<"Autore Ultimo Post :"<<((Blog *)b)->GetAuthor();
cout<<endl<<endl;
}