DZ.cpp

#include <iostream>
using namespace std;

class House;
class Bank;
class Factory;

class InsuranceAgent {
public:
    virtual void visit(House* house) = 0;
    virtual void visit(Bank* bank) = 0;
    virtual void visit(Factory* factory) = 0;
};

class Building {
public:
    virtual void accept(InsuranceAgent* agent) = 0;
    virtual ~Building() {}
};

class House : public Building {
public:
    void accept(InsuranceAgent* agent) override 
    {
        agent->visit(this);
    }
};

class Bank : public Building {
public:
    void accept(InsuranceAgent* agent) override 
    {
        agent->visit(this);
    }
};

class Factory : public Building {
public:
    void accept(InsuranceAgent* agent) override 
    {
        agent->visit(this);
    }
};

class BeginnerAgent : public InsuranceAgent {
public:
    void visit(House* house) override 
    {
        cout << "Home: Offer health insurance for the family.\n";
    }

    void visit(Bank* bank) override 
    {
        cout << "Bank: Offer robbery insurance.\n";
    }

    void visit(Factory* factory) override 
    {
        cout << "Factory: Offer fire and flood insurance.\n";
    }
};

int main() {
    Building* buildings[] = {new House(),new Bank(), new Factory()};

    InsuranceAgent* agent = new BeginnerAgent();
    for (Building* b : buildings) 
    {
        b->accept(agent);
    }
    for (Building* b : buildings) 
    {
        delete b;
    }
    delete agent;
    return 0;
}