Дружественная функция и приватные члены класса

#include <iostream>
#include <string>
#include <fstream>
 
    using namespace std;
 
class ConsumerBasket {
 
    //private: не срабатывает
    public:
 
        string p_name;
        int c_rate;
        double p_price;
    
    public:
  
        friend ofstream& operator<<(ofstream &out, const ConsumerBasket &obj);  
};
 
    ofstream& operator<<(ofstream &out, const ConsumerBasket &obj) {
          out << obj.p_name << " "
            << obj.c_rate << " "
            << obj.p_price << "\n";
        return out;
    }
 
int main() {
    ifstream in("input.txt");
    ofstream out("output.txt");
    int n;
    double sum;
    in >> n;
    ConsumerBasket* goods = new ConsumerBasket[n];
    sum = 0.0;
    for (int i = 0; i < n; i++) {
        in >> goods[i].p_name >> goods[i].c_rate >> goods[i].p_price;
        sum += goods[i].p_price;
    }
    for (int i = 0; i < n; i++) {
          for (int j = n - 1; j > i; j--) {
              if (goods[j].p_price < goods[j-1].p_price) {
                  swap(goods[j], goods[j-1]);
              }
          }
    }
    cout << "Output of the program:\n";
    cout << "Total price: " << sum << "\n";
    for (int i = 0; i < n; i++) {
          out << goods[i];
    }
    in.close();
    out.close();
    cin.get();
    return 0;
}

class ConsumerBasket {
 
    private:
 
        string p_name;
        int c_rate;
        double p_price;
    
    public:
  
        void SetString(const string& s) {p_name = s;} 
        string GetString() {return p_name;} const
};
 
    ofstream& operator<<(ofstream &out, const ConsumerBasket &obj) {
          out << obj.GetString();
        return out;
    }

#include <iostream>
#include <string>
#include <fstream>
#include <vector>
 
using namespace std;
 
class ConsumerBasket {
private:
    string p_name;
    int c_rate;
    double p_price;
 
public:
    ConsumerBasket(string name, int rate, double price) : p_name(name)
                                                        , c_rate(rate)
                                                        , p_price(price) {}
    double getPrice() { return p_price; }
    friend ofstream& operator<<(ofstream &out, const ConsumerBasket &obj);
};
 
ofstream& operator<<(ofstream &out, const ConsumerBasket &obj) {
    out << obj.p_name << " "
        << obj.c_rate << " "
        << obj.p_price << "\n";
    return out;
}
 
int main() {
    ifstream in("input.txt");
    ofstream out("output.txt");
    unsigned n;
    double sum;
    in >> n;
    vector<ConsumerBasket> goods;
    sum = 0.0;
    for(unsigned i = 0; i < n; ++i) {
        string name;
        int rate;
        double price;
        in >> name >> rate >> price;
        sum += price;
        ConsumerBasket obj(name, rate, price);
        goods.push_back(obj);
    }
 
    for(unsigned i = 0; i < n; ++i) {
        for(unsigned j = n - 1; j > i; ++j) {
            if (goods[j].getPrice() < goods[j - 1].getPrice()) {
                swap(goods[j], goods[j - 1]);
            }
        }
    }
    cout << "Output of the program:\n";
    cout << "Total price: " << sum << "\n";
    for(unsigned i = 0; i < n; ++i) {
        out << goods[i];
    }
    in.close();
    out.close();
    cin.get();
    return 0;
}

#include <iostream>
#include <tuple>
 
class ConsumerBasket {
public:
    ConsumerBasket(std::string const& name, int const rate, double const price) noexcept
            : p_name(name), c_rate(rate), p_price(price) {}
 
    std::tuple<std::string, int, double> data() const noexcept { return {p_name, c_rate, p_price}; }
 
private:
    // интересные префиксы офк
    std::string p_name;
    int         c_rate;
    double      p_price;
};
 
ofstream& operator<<(ofstream& out, const ConsumerBasket& obj) {
    out << obj.GetString();
    return out;
}
 
int main()
{
    ConsumerBasket cb("asd", 10, 3.14);
    auto const [name, rate, price] = cb.data();
    std::cout << name << " " << rate << " " << price;
}

class ConsumerBasket {
private:
    struct data_t {
        std::string name;
        int         rate;
        double      price;
    };
 
    data_t data_;
 
public:
    ConsumerBasket(std::string const& name, int const rate, double const price) noexcept : data_({name, rate, price}) {}
 
    data_t data() const noexcept { return data_; }
};
 
 
int main()
{
    ConsumerBasket cb("asd", 10, 3.14);
    std::cout << cb.data().name << " " << cb.data().rate << " " << cb.data().price;
}

class Class
{
private:
    int i;
 
public:
    friend std::ostream& Show(std::ostream& o, const Class&);
};
 
std::ostream& Show(std::ostream& o, const Class& c)
{
    o << c.i;
    return o;
}