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Создание калькулятора #1
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DariaKasackaja
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| import java.util.ArrayList; | ||
|
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| public class Calculator { | ||
| ArrayList<Product> products = new ArrayList<>(); | ||
| double sum; | ||
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| boolean add(String name, double price){ | ||
| Product product = new Product(name, price); | ||
| boolean res = products.add(product); | ||
| if( res ){ | ||
| System.out.println("Товар '" + name+"'"+ | ||
| " стоимостью "+ | ||
| String.format("%.2f ", price) + | ||
| (new Formatter( price ) ).getName()+ | ||
| " добавлен в список.\n"); | ||
| sum += price; | ||
| } | ||
| return res; | ||
| } | ||
|
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| void printProductList(){ | ||
| System.out.println("Добавленные товары:"); | ||
| for(Product product : products){ | ||
| System.out.println("'" + product.name+"' стоимостью " + | ||
| String.format("%.2f ", product.price) + | ||
| (new Formatter( product.price ) ).getName() ); | ||
| } | ||
| } | ||
|
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| void splitCheck(int countPerson){ | ||
| double amountPerPerson = sum/countPerson; | ||
| System.out.println("\nОбщая сумма: " + | ||
| String.format("%.2f ",sum) + | ||
| (new Formatter( sum ) ).getName()); | ||
| System.out.println("Количество человек: " + countPerson); | ||
| System.out.println("С каждого: " + | ||
| String.format("%.2f ", amountPerPerson) + | ||
| (new Formatter( amountPerPerson ) ).getName()); | ||
| } | ||
|
|
||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| public class Formatter { | ||
| int price; // целая часть стоимости | ||
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| Formatter( double _price ){ | ||
| price = (int)_price; | ||
| } | ||
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| public String getName(){ | ||
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| //Чтобы отсеять числа, оканчивающиеся на 11 - 19 (11, 111,1011 и т.д.) | ||
| int priceDevided = price % 100; | ||
| if( (priceDevided > 10) && ( priceDevided < 20) ) | ||
| return "рублей"; | ||
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| switch (price % 10){ | ||
| case 1: | ||
| return "рубль"; | ||
| case 2: | ||
| case 3: | ||
| case 4: | ||
| return "рубля"; | ||
| } | ||
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| return "рублей"; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,58 @@ | ||
| import java.util.Scanner; | ||
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| public class Main { | ||
| private static final Scanner scanner = new Scanner(System.in); | ||
| private static Calculator calculator = new Calculator(); | ||
| public static void main(String[] args) { | ||
| System.out.println("Hello world!"); | ||
| System.out.println("Калькулятор счета приветствует вас. "); | ||
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| int countPerson = getCountPerson(); | ||
| getProducts(); | ||
| calculator.printProductList(); | ||
| calculator.splitCheck(countPerson); | ||
|
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| } | ||
|
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| public static int getCountPerson(){ | ||
| int countPerson; | ||
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| while(true) { | ||
| System.out.println("Введите количество человек. Используйте числа больше 1."); | ||
| String str = scanner.nextLine(); | ||
| countPerson = str.matches("\\d+") ? Integer.parseInt(str) : 0; | ||
| if (countPerson > 1) { | ||
| break; | ||
| } else { | ||
| System.out.println("Вы ввели некорректное значение: " + | ||
| str + | ||
| ". Введите число больше 1. Попробуйте еще раз.\n"); | ||
| } | ||
| } | ||
|
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| return countPerson; | ||
| } | ||
|
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| public static void getProducts(){ | ||
| while(true) { | ||
| System.out.println("Введите название товара или команду 'Завершить':"); | ||
| String strName = scanner.nextLine(); | ||
| if ( strName.equalsIgnoreCase("завершить")){ | ||
| break; | ||
| } | ||
| else{ | ||
| System.out.println("Введите стоимость товара в формате рр.кк:"); | ||
| String strPrice = scanner.nextLine(); | ||
| double price = strPrice.matches("\\d{1,}+(\\.\\d{2}+)") ? Double.parseDouble(strPrice) : -1; | ||
| if( price >= 0 ){ | ||
| calculator.add(strName, price); | ||
| } | ||
| else{ | ||
| System.out.println("Вы ввели некорректную стоимость товара: " + | ||
| strPrice + | ||
| ". Товар не добавлен в список. Попробуйте еще раз.\n"); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| public class Product { | ||
| String name; | ||
| double price; | ||
|
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| Product(String name, double price){ | ||
| this.name = name; | ||
| this.price = price; | ||
| } | ||
| } |
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Вместо конкатенации строк лучше использовать StringBuilder