ЯсноПонятно24

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

class Product { private: std::string name; double price; int quantity; std::string date;

public: Product(std::string n, double p, int q, std::string d) : name(n), price(p), quantity(q), date(d) {}

static double calculateTotalRevenue(std::vector<Product> products, std::string startDate, std::string endDate) {
    double totalRevenue = 0.0;
    for (Product product : products) {
        if (product.date >= startDate && product.date <= endDate) {
            totalRevenue += product.price * product.quantity;
        }
    }
    return totalRevenue;
}

};

int main() { std::vector<Product> products; products.push_back(Product("Apple", 1.0, 10, "2022-01-01")); products.push_back(Product("Banana", 0.5, 20, "2022-01-02")); products.push_back(Product("Orange", 1.5, 15, "2022-01-03"));

std::string startDate = "2022-01-01";
std::string endDate = "2022-01-03";

double totalRevenue = Product::calculateTotalRevenue(products, startDate, endDate);

std::cout << "Total revenue from " << startDate << " to " << endDate << " is: $" << totalRevenue << std::endl;

return 0;

}