housework

import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.Scanner;

public class Blank2 {
    public static void main(String[] args) {

        for (int i = 7; i > 0; i--) {
            System.out.println("*".repeat(i));
        }
        for (int i = 0; i < 6; i++) {
            System.out.print("#");
            System.out.print(" ".repeat(i));
            System.out.println("#");

        }

        Scanner scanner = new Scanner(System.in);
        boolean error;

        do {
            error = false;
            try {
                System.out.println("Enter the length in feet below to get he value to inches.");

                System.out.println("Result: " + feet_to_inches(scanner.nextBigDecimal()) + " in.");
            } catch (Exception e) {
                System.out.println("Not allowed format! Try again!");
                error = true;
                scanner.nextLine();
            }
        } while (error);

        do {
            error = false;
            try {

                System.out.println("Enter five test scores to calculate grades and the average score.");
                double s1 = scanner.nextDouble();
                double s2 = scanner.nextDouble();
                double s3 = scanner.nextDouble();
                double s4 = scanner.nextDouble();
                double s5 = scanner.nextDouble();
                if (!(s1 >= 0 && s1 <= 100) ||
                        !(s2 >= 0 && s2 <= 100) ||
                        !(s3 >= 0 && s3 <= 100) ||
                        !(s4 >= 0 && s4 <= 100) ||
                        !(s5 >= 0 && s5 <= 100)) {
                    error = true;
                    System.out.println("The score cannot be a negative number or more than 100. Try again");
                    continue;
                }
                System.out.println("score: " + s1 + " = " + determine_grade(s1) + " grade");
                System.out.println("score: " + s2 + " = " + determine_grade(s2) + " grade");
                System.out.println("score: " + s3 + " = " + determine_grade(s3) + " grade");
                System.out.println("score: " + s4 + " = " + determine_grade(s4) + " grade");
                System.out.println("score: " + s5 + " = " + determine_grade(s5) + " grade");

                System.out.println("The average score is: " + calc_average(s1, s2, s3, s4, s5));
            } catch (Exception e) {
                System.out.println("Not allowed format. The score must be a number and cannot be a negative number or more than 100. Try again.");
                scanner.nextLine();
                error = true;

            }
        } while (error);

        do {
            error = false;
            try {
                System.out.println("Enter a number between 0 and 2.140.000.000 to figure out whether it is a prime.");
                System.out.println(is_prime(scanner.nextInt())?"It's a prime!":"It's just a number.");
            } catch (Exception e) {
                System.out.println("Not allowed format.");
                error = true;
                scanner.nextLine();
            }
        } while (error);

        scanner.close();
        System.out.println();
        System.out.print("The primes are the folowing from 1 to 100: ");
        for (int i = 1; i <= 100; i++) {
            System.out.print(is_prime(i)?i+" ":"");
        }

    }

    public static BigDecimal feet_to_inches(BigDecimal foot) {
        BigDecimal b = new BigDecimal("12");
        return foot.multiply(b);
    }

    public static double calc_average(double s1, double s2, double s3, double s4, double s5) {

        return (s1 + s2 + s3 + s4 + s5) / 5;
    }

    public static char determine_grade(double score) {

        char grade = 'F';

        if (score > 89) {
            grade = 'A';
        } else if (score > 79) {
            grade = 'B';
        } else if (score > 69) {
            grade = 'C';
        } else if (score > 59) {
            grade = 'D';
        }

        return grade;
    }

    public static boolean is_prime(int number) {

        BigInteger bigInteger = BigInteger.valueOf(number);
        return bigInteger.isProbablePrime(100);
    }

}