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ДЗ 2 спринт #1

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8452cb8
дз 2 спринт
rbetristha Aug 24, 2023
ed2c064
дз 2 спринт
rbetristha Aug 24, 2023
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52 changes: 52 additions & 0 deletions src/main/java/Calculator.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,52 @@
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Calculator {
int amount;
float sum;
List<Item> items = new ArrayList<>();
Calculator (int amount) {

@Charmandik Charmandik Aug 24, 2023

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старайся давать переменным максимально осмысленные имена, которые максимально точно описывают их значение. просто "количество" не даёт полной картины, что это такое, а вот "количество человек" уже гораздо понятнее

this.amount = amount;
}

void addItem(Scanner scanner) {
String input;
String name;
float price;
while (true) {
System.out.println("Добавьте позицию в счёт. Введите название:");
name = scanner.nextLine();
System.out.println("Укажите стоимость товара:");
while (true) {
try {
price = scanner.nextFloat();
if (price >= 0) {
sum += price;
break;
} else {
System.out.println("Неверный формат, попробуйте ещё раз.");
}
} catch (Exception e) {
System.out.println("Неверный формат, попробуйте ещё раз.");
scanner.skip(".*\\n");
}
}

items.add(new Item(name, price));
System.out.println("Товар успешно добавлен. Добавить ещё один?\n(Для выхода наберите команду \"Завершить\")");
input = scanner.next();
if (input.equalsIgnoreCase("Завершить")) { break; }
scanner.skip(".*\\n");
}
}

void printCheck() {
System.out.println("Добавленные товары:");
for (int i = 0; i < items.size(); i++) {
System.out.println("- " + Formatter.formatString(items.get(i).name) + ": " + Formatter.formatFloat(items.get(i).price) + " " + Formatter.formatRoubles(items.get(i).price));
}
System.out.println("Каждый гость должен оплатить " + Formatter.formatFloat(sum/amount) + " " + Formatter.formatRoubles(sum/amount));
}

}
32 changes: 32 additions & 0 deletions src/main/java/Formatter.java
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@@ -0,0 +1,32 @@
public class Formatter {

public static String formatString(String string) {
string = string.toLowerCase();
string = string.substring(0, 1).toUpperCase() + string.substring(1);
return string;
}

public static String formatFloat(float number) {
return String.format("%.2f", number);
}

public static String formatRoubles(float number) {
int i = (int) number;
int lastDigit = i % 10;
String format;

if (i % 100 > 10 && i % 100 < 20) {
format = "рублей";
return format;
}

format = switch (lastDigit) {
case 1 -> "рубль";
case 2, 3, 4 -> "рубля";
default -> "рублей";
};

return format;
}

}
9 changes: 9 additions & 0 deletions src/main/java/Item.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
public class Item {
String name;
float price;

Item(String name, float price) {
this.name = name;
this.price = price;
}
}
27 changes: 26 additions & 1 deletion src/main/java/Main.java
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Original file line number Diff line number Diff line change
@@ -1,6 +1,31 @@
import java.util.Scanner;

public class Main {
public static void main(String[] args) {
System.out.println("Hello world!");
Scanner scanner = new Scanner(System.in);
int amount = amountPeople(scanner);
Calculator calculator = new Calculator(amount);
calculator.addItem(scanner);
calculator.printCheck();
scanner.close();
}

public static int amountPeople(Scanner scanner) {
int amount;
System.out.println("Введите, пожалуйста, количество гостей:");
while (true) {
try {
amount = scanner.nextInt();
if (amount <= 1) {
System.out.println("Гостей должно быть больше одного, попробуйте ещё раз.");
} else break;
} catch (Exception e) {
System.out.println("Неверный формат, попробуйте ещё раз.");
scanner.skip(".*\\n");
}
}
System.out.println("Количество гостей: " + amount + ".");
scanner.skip(".*\\n");
return amount;
}
}