public class Calculator {

private int peopleCounter;

private String addedProducts = "Добавленные товары:\n";

private double totalPrice;

public Calculator(int peopleCounter){

this.peopleCounter = peopleCounter;

}

public void addProduct(Product product){

addedProducts = addedProducts + product.getName() + "\n";

totalPrice += product.getPrice();

System.out.println("Товар успешно добавлен.");

}

public void showAddedProducts(){

System.out.println("\n" + addedProducts);

}

public void divide(){

double dividedPrice = totalPrice / (double) peopleCounter;

String formattedPrice = formatPrice(dividedPrice);

String currency = getCurrencyWriting(dividedPrice);

System.out.println("Каждый человек должен заплатить " + formattedPrice + " " + currency + ".");

}

private String formatPrice(double price){

return String.format("%,.2f", price);

}

private String getCurrencyWriting(double price){

double roundedPrice = Math.floor(price);

double remainder = roundedPrice % 100.00;

if (remainder >= 11 && remainder <= 14){

return "рублей";

} else {

remainder = remainder % 10.00;

if (remainder >= 1 &&

remainder < 2) {

return "рубль";

} else if (remainder >= 2 &&

remainder <= 4) {

return "рубля";

} else {

return "рублей";

}

}

}

}