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prefinish #1

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35 changes: 35 additions & 0 deletions src/main/java/Calculator.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,35 @@
public class Calculator {

double allPriceSum;
String basket;

public void addGoods(String newGoods, double goodsPrice) {
if (this.basket == null) {
this.basket = newGoods;
} else {
this.basket = this.basket + "\n" + ((this.basket.compareToIgnoreCase(newGoods) != 0) ? newGoods : "");
}
this.allPriceSum = this.allPriceSum + goodsPrice;
}

public String correctStringCurrency(int peopleCount) {
double lastValue = (allPriceSum / peopleCount) % 100 / 10;
String retValue;
if ((int)lastValue == 1) {
return "рублей";
} else {
switch ((int) Math.floor((allPriceSum / peopleCount) % 10)) {
case 1:
retValue = "рубль";
break;
case 2, 3, 4:
retValue = "рубля";
break;
default:
retValue = "рублей";
break;
}
}
return retValue;
}
}
53 changes: 52 additions & 1 deletion src/main/java/Main.java
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Original file line number Diff line number Diff line change
@@ -1,6 +1,57 @@
import java.util.Scanner;

public class Main {
public static void main(String[] args) {
System.out.println("Hello world!");
// Объявим все что необходимо для работы
Calculator calculator = new Calculator();
Scanner scan = new Scanner(System.in);
int peopleCount;

while (true) {
System.out.println("На сколько человек необходимо разделить счет?");
try {
peopleCount = Integer.parseInt(scan.next());

@gusar-off gusar-off Apr 17, 2023

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У Scanner есть удобный метод hasNextInt, можно сразу узнать без дополнительных проверок возможно ли интерпретировать строку как int

if (peopleCount < 1) {
System.out.println("Ошибка ввода попробуйте еще раз!");
} else if (peopleCount == 1) {
System.out.println("Счет не может быть разделен на одного человека. Попробуйте еще раз!");
} else {
break;
}
} catch (NumberFormatException ex) {
System.out.println("Ошибка ввода! Возможен только ввод целых чисел.");
}
}

// переменные для записи товара
double price;
String goodsName;
while (true) {
System.out.println("Введите наименование товара: ");
goodsName = scan.next();
while (true) {
System.out.println("Введите стоимость товара: ");
try {
price = Double.parseDouble(scan.next());

@gusar-off gusar-off Apr 17, 2023

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Также по аналогии у Scanner есть метод hasNextDouble
https://docs.oracle.com/javase/1.5.0/docs/api/java/util/Scanner.html#hasNextDouble%28%29

if (price <= 0) {
System.out.println("Стоимость товара не может быть отрицательной или меньше 0");
}
break;
} catch (NumberFormatException ex) {
System.out.println("Ошибка ввода! Необходимо ввести стоимость товара в формате рубли.копейки.");
}
}
calculator.addGoods(goodsName, price);
System.out.println("Товар добавлен в корзину!");
System.out.println("Хотите ли вы добавить еще товар?");
if (scan.next().toLowerCase().compareTo("завершить") == 0) {
break;
}
}

System.out.println("Добавленные товары: " + "\n" + calculator.basket);
System.out.println("Стоимость счета на каждого человека составляет: " +
String.format("%.2f", calculator.allPriceSum / peopleCount) + " " + calculator.correctStringCurrency(peopleCount));
scan.close();
}
}