static void Main(string[] args)
{
List <Product> productsBuy = new List <Product>()
{
new Product("Computer", 122.4M),
new Product("Notebook", 17.3M),
new Product("Phone", 22.4M),
};
List <Product> productsSale = new List <Product>()
{
new Product("Analitycs", 200.5M),
new Product("Consulting", 300M),
};
BuyDocument bd = new BuyDocument(productsBuy);
SaleDocument sd = new SaleDocument(productsSale);
ISummable[] listDoc = new ISummable[2];
listDoc[0] = bd;
listDoc[1] = sd;
foreach (var item in listDoc)
{
item.Average();
}
Console.ReadKey();
}
// расширяющий метод для интерфейса ISummable вычиляет среднюю цену позиции в документе
public static void Average(this ISummable doc)
{
int count = 0;
decimal total = 0;
foreach (Product p in doc)
{
count++;
total += p.Price;
}
Console.WriteLine($"Сдредняя цена продукта в документе {(decimal)total/count:0.000}");
}
public static void SumSummable(ISummable input)
{
var sum = SumForable(input);
input.Sum = sum;
}
