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Thread: Complete Noob -- A little help would be appreciated...

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    Default Complete Noob -- A little help would be appreciated...

    I'm seriously confused with the Random class in relation to the following question:

    Write a program to prompt the user for three integers from 1 to 3. Using random numbers, print which number(s) are guessed correctly. Allow the user to continue to guess by inputting any incorrect number(s) until the user inputs an ‘n’ to quit the program, or the program displays “CONGRATULATIONS, ALL THREE NUMBERS WERE GUESSED CORRECTLY! THE NUMBERS WERE: 2, 2, 1.” The logic for the user would look like:

    You may input an ‘n’ to quit the program at any time.
    Please enter number 1: 2
    Please enter number 2: 1
    Please enter number 3: 2

    Number 1 is correct.

    Is the following code randomly generating a number between 0-3 and, if so, what would the next step be to compare the randomly generated number to the user input? Here is the code:

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

    public class Random
    {
    public static void main(String[] args)
    {
    Scanner keyboard = new Scanner (System.in);

    int number1;
    int number2;
    int number3;
    int userAnswer;

    Random randomNumbers = new Random()

    number1 = randomNumbers.nextInt(3);
    number2 = randomNumbers.nextInt(3);
    number3 = randomNumbers.nextInt(3);

    System.out.println("Please guess number 1. The number must be within zero and three. ";
    userAnswer = keyboard.nextInt();

    ETC...

    Any help is appreciated.

    E


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    Default Re: Complete Noob -- A little help would be appreciated...

    Firstly, please format your code using highlight tags. See my signature.

    The <Random>.nextInt(int number) methods returns integers between 0 and number - 1, inclusive. So, for example, if you used <Random>.nextInt(7) you would get a random integer ranging from 0 to 6. Similarly, if you want numbers from 2 to 4, not starting at 0, you could use <Random>.nextInt(3) + 2.

    If that doesn't help, use some System.println()'s to help display what your random numbers are.

    System.out.println("Please guess number 1. The number must be within zero and three. ";
    userAnswer = keyboard.nextInt();
    This looks alright, but think: what if the user enters a number less than one or greater than three, or maybe not even a number at all? You should probably use some input validation and a while loop to make sure that the user doesn't play any dirty tricks to crash your program.
    Use highlight tags to help others help you!

    [highlight=Java]Your prettily formatted code goes here[/highlight]

    Using these tags makes your code formatted, and helps everyone answer your questions more easily!




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