https://otvet.mail.ru/question/237547482

#include <algorithm>
#include <chrono>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>

using namespace std;
using namespace std::chrono;

struct Date {
    int dd;
    int mm;
    int yyyy;
    Date() : dd(1), mm(1), yyyy(1992) {
        set_current();
    }
    int difference() const {
        const auto today = sys_days{ floor<days>(system_clock::now()) };
        const auto target = sys_days{ year_month_day{year(yyyy), month(mm), day(dd)} };
        return (today - target).count();
    }
private:
    void set_current() {
        auto now = system_clock::now();
        auto date = floor<days>(current_zone()->to_local(now));
        dd = static_cast<unsigned>(year_month_day{ date }.day());
        mm = static_cast<unsigned>(year_month_day{ date }.month());
        yyyy = static_cast<int>(year_month_day{ date }.year());
    }
    friend istream& operator>>(istream& inp, Date& date) {
        cout << "Введите дату через пробел в формате ДД ММ ГГГГ: ";
        inp >> date.dd >> date.mm >> date.yyyy;
        inp.ignore(0x1000, '\n');
        return inp;
    }
    friend ostream& operator<<(ostream& out, const Date& date) {
        string date_string;
        if (date.dd < 10) date_string = "0";
        date_string += to_string(date.dd) + ".";
        if (date.mm < 10) date_string += "0";
        date_string += to_string(date.mm) + "." + to_string(date.yyyy);
        return out << date_string;
    }
};

struct Goods {
    string name;
    unsigned quantity;
    float price;
    Date date;
    Goods() : name("-"), quantity(0), price(0.0F) {}
private:
    friend istream& operator>>(istream& inp, Goods& goods) {
        cout << "Введите наименование товара: ";
        getline(inp, goods.name);
        cout << "Введите количество товара: ";
        inp >> goods.quantity;
        inp.ignore(0x1000, '\n');
        cout << "Введите цену товара: ";
        inp >> goods.price;
        inp.ignore(0x1000, '\n');
        return inp >> goods.date;
    }
    friend ostream& operator<<(ostream& out, const Goods& goods) {
        out << goods.name << ' ' << goods.quantity << ' '
            << goods.price << ' ' << goods.date;
        return out;
    }
    friend bool operator<(const Goods& a, const Goods& b) {
        return a.name < b.name;
    }
};

class Warehouse {
public:
    void add(const Goods& goods) {
        this->goods.push_back(goods);
    }
    vector<Goods> select(const float price) const {
        vector<Goods> selection;
        Date current;
        for (const auto& record : goods) {
            if (record.date.difference() > limit && record.price > price) {
                selection.push_back(record);
            }
        }
        sort(begin(selection), end(selection));
        return selection;
    }
private:
    static constexpr auto limit = 30;
    vector<Goods> goods;
};

static Warehouse create() {
    Warehouse warehouse;
    cout << "Введите размер списка: ";
    size_t limit;
    cin >> limit;
    cin.ignore(0x1000, '\n');
    Goods goods;
    for (size_t i = 0; i < limit; ++i) {
        cin >> goods;
        warehouse.add(goods);
    }
    return warehouse;
}

static void show(const vector<Goods>& goods) {
    puts("Вывод результатов:");
    size_t n = 0;
    for (const auto& record : goods) {
        cout << ++n << ". " << record << '\n';
    }
}

int main() {
    cout.setf(ios::fixed);
    cout.precision(2);
    system("chcp 1251 > nul");
    auto warehouse = create();
    auto result = warehouse.select(100000);
    show(result);
    system("pause > nul");
}