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Важно, чтобы программа была устойчивой к неожиданным вводам от пользователя. Например, если пользователь введёт буквы или дробные числа, как ты заметил, программа завершится с ошибкой. Основная проблема в том, что метод scanner.nextInt() ожидает целое число, и если ввод не подходит, выбрасывается исключение (InputMismatchException). Чтобы обработать такие случаи, нужно использовать проверку ввода if (scanner.hasNextInt()) |
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