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рабочая версия калькулятора ресторанного счёта #1

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9 changes: 9 additions & 0 deletions src/main/java/Good.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
public class Good {
public String Name;
public double Price;

public Good(String goodName, double goodPrice) {
Name = goodName;
Price = goodPrice;
}
}
10 changes: 10 additions & 0 deletions src/main/java/InputValueController.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
public class InputValueController {
public static boolean IsNumberOfPeopleCorrect(int countPeople) {
return countPeople > 1;
}

public static boolean IsPriceCorrect(double price) {
return price >= 0;
}
}

62 changes: 59 additions & 3 deletions src/main/java/Main.java
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Original file line number Diff line number Diff line change
@@ -1,8 +1,64 @@
import java.util.Scanner;

public class Main {

public static void main(String[] args) {
// ваш код начнется здесь
// вы не должны ограничиваться только классом Main и можете создавать свои классы по необходимости
System.out.println("Привет Мир");
int countPeople;
TotalAmountOutput currencyNameConverter = new TotalAmountOutput();

Scanner scanner = new Scanner(System.in);
boolean countPeopleIsCorrect;
do
{
System.out.println("На какое количество человек разделить счёт?");
countPeople = scanner.nextInt();
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@MagicUnderHood MagicUnderHood Dec 10, 2022

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Пользователь может ввести на вопрос про количество человек вместо целого числа строку, и приложение упадет. Для стоимости товаров ты обрабатываешь такую ситуацию через hasNextDouble, стоит добавить обработку и для количества людей, чтобы приложение не падало.

// проверка введенного количества людей
countPeopleIsCorrect = InputValueController.IsNumberOfPeopleCorrect(countPeople);
if (!countPeopleIsCorrect){
System.out.println("Количество должно быть больше 1");
}
} while (!countPeopleIsCorrect);


SplitBillCalculator calculator = new SplitBillCalculator(countPeople);

while (true) {
System.out.println("Введите наименование товара или команду 'Завершить' для окончания ввода товаров");
String goodsName = scanner.next();
if (goodsName.equalsIgnoreCase("завершить"))
break;

double price;
System.out.println("Введите стоимость товара в формате 0,00");
while (true){
if (scanner.hasNextDouble()) {
price = scanner.nextDouble();
boolean isCorrect = InputValueController.IsPriceCorrect(price);
if (isCorrect)
break;
}
System.out.println("Ошибка в формате числа. Повторите ввод");
scanner.next();
}

Good good = new Good(goodsName, price);
calculator.AddGoods(good);
String rubString = currencyNameConverter.GetCorrectRubString(calculator.TotalAmount);
System.out.printf("Товар добавлен. Текущая сумма счёта %.2f %s\n", calculator.TotalAmount, rubString);
}

System.out.println("Добавленные товары:");
System.out.println(calculator.ListOfGoods);

String rubString = currencyNameConverter.GetCorrectRubString(calculator.TotalAmount);
System.out.printf("Общая сумма: %.2f %s\n", calculator.TotalAmount, rubString);

double splitTotalAmount = calculator.SplitTotalAmount();
String splitRubString = currencyNameConverter.GetCorrectRubString(splitTotalAmount);
System.out.printf("Сумма с человека: %.2f %s\n", splitTotalAmount, splitRubString);

System.out.println("Для завершения нажмите любую клавишу");
scanner.next();
}
}

20 changes: 20 additions & 0 deletions src/main/java/SplitBillCalculator.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,20 @@
public class SplitBillCalculator {

int countPeople;

public String ListOfGoods = "";
public double TotalAmount = 0;

public SplitBillCalculator(int countPeople) {
this.countPeople = countPeople;
}

public void AddGoods(Good good) {
ListOfGoods = ListOfGoods +"\n"+ good.Name;
TotalAmount = TotalAmount + good.Price;
}

public double SplitTotalAmount() {
return TotalAmount / countPeople;
}
}
26 changes: 26 additions & 0 deletions src/main/java/TotalAmountOutput.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,26 @@
public class TotalAmountOutput {
public String GetCorrectRubString(double totalAmount) {
int lastDigit = GetLastIntDigit(totalAmount);

switch (lastDigit) {
case 1:
return "рубль";
case 2:
case 3:
case 4:
return "рубля";
default:
return "рублей";
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@MagicUnderHood MagicUnderHood Dec 10, 2022

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Единственное, не учтена ситуация для чисел 11-19, окончание должно быть "рублей", а сейчас дает рубля для 12-14. Для этого стоит проверять, что округленное totalAmount % 100 между 11 и 19 включительно находится

}
}

//получить последнюю цифру из числа для определения падежа слова рубль
private int GetLastIntDigit (double totalAmount) {
int intTotalAmount = (int) totalAmount;
String stringTotalAmount = String.valueOf(intTotalAmount);
int length = stringTotalAmount.length();
char lastDigit = stringTotalAmount.charAt(length-1);
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@MagicUnderHood MagicUnderHood Dec 10, 2022

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Можно использовать деление по модулю - %10 для определения последней цифры

return Character.getNumericValue(lastDigit);
}
}

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