Lear

#include <string>
#include <vector>
#include <iostream>

using namespace std;

class Entity
{
    private:
        const string word;
        const bool boolean;
        const signed int integer;
        static signed int entityCount;
    public:
        Entity(void);
        Entity(const signed int& integer, const string& word, const bool& boolean);

        static signed int getEntityCount(void);

        const string* const getWord(void) const;
        const bool* const getBoolean(void) const;
        const signed int* const getInteger(void) const;

        virtual void print(void) = 0; // const;
};

class SpecificEntity : public Entity
{
    public:
        SpecificEntity(void);
        SpecificEntity(const signed int& integer, const string& word, const bool& boolean);
        void print(void) const;
};

int Entity::entityCount = 0;
Entity::Entity(void) : Entity(0, "", false) {}

Entity::Entity(const signed int& integer, const string& word, const bool& boolean)
    : integer(integer)
    , word(word)
    , boolean(boolean)
{
    this->print();
    ++Entity::entityCount;
}

const string* const Entity::getWord(void) const { return &this->word; }
const bool* const Entity::getBoolean(void) const { return &this->boolean; }
const signed int* const Entity::getInteger(void) const { return &this->integer; }
signed int Entity::getEntityCount(void) { return Entity::entityCount; }

/*
void Entity::print(void) const
{
    cout
        << "Integer: " << this->integer << endl
        << "Word: " << this->word << endl
        << "Boolean: " << this->boolean << endl
        << endl;
}
*/

void SpecificEntity::print(void) const
{
    // this->print();
    cout << "Modified";
}

SpecificEntity::SpecificEntity(void) : Entity(0, "", false) {}
SpecificEntity::SpecificEntity(const signed int& integer, const string& word, const bool& boolean) : Entity(integer, word, boolean){}


int main ()
{
    const bool boolean {true};
    const signed int integer {50};
    const std::string word {"Some word"};

    const int entitiesLength {3};
    std::vector<SpecificEntity> entities;

    for (int index = 0; index < entitiesLength; index++)
        entities.push_back({ integer, word, boolean });

    std::cout << "Total number of entities: " << Entity::getEntityCount() << std::endl;
}