Question

IN BASIC JAVA and using JAVA.UTIL.RANDOM write a program will randomly pick a number between one and 100. Then it will ask the user to make a guess as to what the number is. If the guess is incorrect, but is within the range of 1 to 100, the user will be told if it is higher or lower and then asked to guess again. If the guess was outside the valid range or not readable by Scanner class, a message to “try again” will be given. The range of acceptable guesses should change with each new piece of information. Here is a partial output of the program.

Enter 1 to 100: 45

Good guess but your value is too low

Enter 46 to 100: 87

Good guess but your value is too high

Enter 46 to 86 : 25

Value is outside of range

Enter 46 to 86: fifty

Inputs must be numerical

Enter 46 to 86: 57

That is the correct number! It took you 3 valid guesses, 5 in total.

When each guess happens, the hidden answer, this new guess, and the current min and max values will be sent to a static method called high_or_low (4 input parameters). This method will attempt to return an integer value that is the difference from the correct value. This value will help you determine if value guessed is higher(positive), lower(negative), or zero(found) then the correct answer. If the guess was outside the current range allowed (this starts with 1 to 100 but changes with each valid guess) an exception should be thrown from the method. The main method should have a loop and try and catch blocks needed to force the user to reenter for any inputs that are not the correct answer(including bad input or out of range), forcing them to reenter. Continue until the number is finally guessed and then report the total number of valid guesses and total overall guesses. Exceptions must be used and caught and NO BREAK STATEMENTS

Answer 1

Thanks for the question.

Below is the code you will be needing  Let me know if you have any doubts or if you need anything to change.

Thank You !

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import java.util.InputMismatchException;
import java.util.Random;
import java.util.Scanner;

public class GuessingGame {

    private static int high_or_low(int hiddenAnswer, int userGuess, int min, int max) {

        if (userGuess == hiddenAnswer) return 0;

        if (userGuess < min || userGuess > max) {
            throw new IllegalArgumentException("Try again");
        }

        return hiddenAnswer - userGuess;
    }


    public static void main(String[] args) {

        Random random = new Random();
        Scanner scanner = new Scanner(System.in);
        int hiddenAnswer = 1 + random.nextInt(100);
        //      System.out.println("hiddenAnswer = " + hiddenAnswer);
        int min = 1;
        int max = 100;
        int difference = 100;
        int userGuess = -1;
        int validGuesses = 0;
        int totalGuesses = 0;
        do {
            System.out.print("Enter " + min + " to " + max + ": ");
            try {
                totalGuesses += 1;
                userGuess = scanner.nextInt();
                difference = high_or_low(hiddenAnswer, userGuess, min, max);
                validGuesses+=1;
                if (difference < 0) {
                    System.out.println("Good guess but your value is too high");
                    max = userGuess;
                } else if (difference > 0) {
                    System.out.println("Good guess but your value is too low");
                    min = userGuess;
                } else {
                    System.out.println("That  is the correct number! It took you "+
                            (validGuesses-1)+" valid guesses, "+totalGuesses+" in total.");
                }
            } catch (InputMismatchException e) {
                System.out.println("Inputs must be numerical");
                scanner.nextLine();
            } catch (IllegalArgumentException e) {
                System.out.println("Try again");
            }

        } while (difference != 0);

    }
}

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let me know if you have any doubts or if you need anything to change.

If you are satisfied with the solution, please rate the answer.

Thanks!

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