#include<cstdio>
#include<cstdlib>
#include<iostream>

using namespace std;

//this is not multi list
struct User {
  string name = "Default";
  string phone = "";
  User * next_user = NULL;
  private:
  int num_of_cup = 4;

  public:
  User (string new_name, string new_phone) {
    name = new_name;
    phone = new_phone;
  }

  User () {
      num_of_cup = 6;
  }

  int get_num_of_cups() {
      return num_of_cup;
  }

  User* add(string new_name, string new_phone){
    if (name == new_name) {
       return NULL;
    }
    else {
       if (next_user == NULL){
           User new_user = User(new_name, new_phone);//crete new element
           next_user = &new_user;
           return next_user;
       }
       User* res = (*next_user).add(new_name, new_phone);
       return res;
    }
  }

    bool remove(string name) {
        if (next_user == NULL) {
            return false;
        }
        if ((*next_user).name == name) {
            next_user =  next_user->next_user;//remove element
            return true;
        }
        return next_user->remove(name);
    }

    int count() {
        if (next_user == NULL)
            return 1;
        cout << "HERE1\n";
        int res = next_user->count();
        cout << "HERE2\n";
        return res++;
    }
};

struct List {
private:
    User * head = NULL;

public:
    List () {
    }

    User * add(string new_name, string new_phone) {
        if (head == NULL) {
            User new_user = User(new_name, new_phone);//crete new element
            head = &new_user;
        }
        else {
            head->add(new_name, new_phone);
        }
    }

    bool remove(string name) {
        if (head == NULL) {
           return false;
        }
        if (head->name == name) {
            head = head->next_user; //remove element
        return true;
        }
        return head->next_user->remove(name);
    }

    int count() {
        if (head == NULL)
            return 0;
        return head->count();
    }
};


User noName;

void f(int b) {
    b++;
}

void incorrect_change_Name(User user, string new_name) {
    user.name = new_name;
}

void change_Name(User * ptr_user, string new_name) {
    (*ptr_user).name = new_name; //синтаксический сахар ptr_user->name = new_name;
}



int main() {
    int a = 4;
    f(a);
    cout << a << "\n";
    User Masha("Masha", "777");
    cout << Masha.name << "\n";
    change_Name(&Masha, "Dima");
    cout << Masha.name << "\n";
    cout << Masha.get_num_of_cups() << " " << noName.get_num_of_cups();
    //cout << Masha.num_of_cup; - doesn't let to use out of structure
    Masha.next_user = &noName;
    if (Masha.next_user != NULL) {
        cout << "Name of next user is: " << Masha.next_user->name;
    }
    cout << "---\n";
    List test;
    cout << test.count() << "\n";
    test.add("Vasya", "666");
    cout << test.count() << "\n";
    test.add("Masha", "777");
    cout << test.count() << "\n";
    return 0;
}