cpp

#include <iostream>
#include <string>
using namespace std;

class Exchange {
public:
    string getApiUrl() {
        return apiUrl;
    }
    void setApiUrl(string value) {
        apiUrl = value;
    }
    string getName() {
        return name;
    }
    void setName(string value) {
        name = value;
    }
    string getType() {
        return type;
    }
    void setType(string value) {
        type = value;
    }
    string getUrl() {
        return url;
    }
    void setUrl(string value) {
        url = value;
    }

protected:
    string apiUrl;
    string name;
    string type;
    string url;
};

class StockExchange: public Exchange {
public:
    StockExchange(string title, string cur, string loc) {
        name = title;
        currency = cur;
        city = loc;
        type = 'stock';
    }

private:
    string currency;
    string city;
};

class CryptoExchange: Exchange {

};

int main() {
    StockExchange moex("MOEX", "RUB", "Moscow");

    moex.setUrl("moex.com");
    string url = moex.getUrl();

    cout << url;

    return 0;
}