c++：如何创建收据以显示所选项目及其数量、价格和总价

struct Item {
    std::string name;
    int quantity;
    double price;
};

std::vector<Item> selectedItems;

Item newItem;
newItem.name = "项目名称";
newItem.quantity = 2;
newItem.price = 19.99;

selectedItems.push_back(newItem);

double total = 0.0;

for (const Item& item : selectedItems) {
    double itemTotal = item.quantity * item.price;
    total += itemTotal;

    // 输出项目名称、数量、价格和总价
    std::cout << "项目名称: " << item.name << std::endl;
    std::cout << "数量: " << item.quantity << std::endl;
    std::cout << "价格: " << item.price << std::endl;
    std::cout << "总价: " << itemTotal << std::endl;
    std::cout << std::endl;
}

// 输出所有项目的总价
std::cout << "总计: " << total << std::endl;