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Thread: Random number guessing game with three tries (loops)

  1. #1
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    Default Random number guessing game with three tries (loops)

    hi! this is my first time one a forum and learning code, so please bear with me.
    I was told to write a program which generates a random number between 0 to 5 *including 5*
    and give the user 3 chances to guess this number:
    If the user enters a wrong number within 0 to 5, the user has lost one opportunity.
    If the user enters a number out of range, the program should prompt the user to enter a number within the range
    If the user has 3 unsuccessful attempts, the program will print the number.
    i was also instructed to use
    Random randomNumber=new Random();
    int i= randomNumber.nextInt(6)

    i have attempted it and this is what i have so far.

    package assignment7;
     
    import java.util.Random;
    import java.util.Scanner;
     
    public class Exercise1 
    {
    	public static void main(String[] args) 
    	{
     
    		Random randomNumber=new Random();
    		Scanner scan=new Scanner(System.in);
    		int randomNumber,guessNumber;
     
    		randomNumber=randomGenerator.nextInt(4);
    		System.out.print("Guess the random number: " + "\n" + "you get three tries");
    		guessNumber=scan.nextInt();
     
    		for(int randomNumber;randomNumber<=4;randomNumber++)
    			randomNumber=randomNumber<=4;
     
    	}
    }


  2. #2
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    Default Re: Random number guessing game with three tries (loops)

    What happens when you compile and execute the code?
    If there are error messages, copy and paste them here.
    If you don't understand my answer, don't ignore it, ask a question.

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    ATB (March 8th, 2014)

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    Default Re: Random number guessing game with three tries (loops)

    what happens when i try to compile & run

    Exception in thread "main" java.lang.Error: Unresolved compilation problems:
    Duplicate local variable randomNumber
    randomGenerator cannot be resolved

    at assignment7.Exercise1.main(Exercise1.java:13)

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    Default Re: Random number guessing game with three tries (loops)

    Duplicate local variable randomNumber
    randomGenerator cannot be resolved
    Is the variable: randomNumber defined more than one time? Rename one of them to a different name.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Random number guessing game with three tries (loops)

    to be honest i'm not sure what im doing but i think im missing something
    here is the revised version
    Capture.jpg

  7. #6
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    Default Re: Random number guessing game with three tries (loops)

    PLease post the code here, not an image. Find/Search doesn't work with images.
    If you don't understand my answer, don't ignore it, ask a question.

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    ATB (March 8th, 2014)

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    Default Re: Random number guessing game with three tries (loops)

    sorry. im changing it again now i think this will be good

    package assignment7;
     
    import java.util.Scanner;
    import java.util.Random;
     
    public class Exercise1 
    {
     
    	static int lowNumber=0;
    	static int highNumber=5;
    	static int numOfGuessesAllowed=3;
     
    public static void main(String[] args) 
    	{
    		@SuppressWarnings("resource")
    		Scanner sc = new Scanner(System.in);
    		Random generator = new Random();
    		int target = generator.nextInt(highNumber) + lowNumber;
    		int numOfGuesses=0;
    		while(numOfGuesses < numOfGuessesAllowed) 
    	{
     
    	System.out.println("Guess a number:");
    	int guess = sc.nextInt();
    	boolean hasWon = checkNumber(guess, target);
    	numOfGuesses++;
    	if(hasWon) 
    	{
    		System.out.println("You win");
    		System.exit(0);
    	}
    	}
    		System.out.println("You lose");
    		System.exit(0);
    	}
     
    public static boolean checkNumber(int guess, int target) {
    	if(guess < target) 
    	{
    		System.out.println("Higher");
    	} else if (guess > target) {
    		System.out.println("Lower");
    	}
    	return guess==target;
    	}
     
    }


    Compile and Run:

    Guess a number:
    1
    Higher
    Guess a number:
    2
    Higher
    Guess a number:
    3
    Higher
    You lose
    Last edited by ATB; March 8th, 2014 at 06:14 PM.

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    Default Re: Random number guessing game with three tries (loops)

    does it compile and execute now?

    Please edit your post and wrap your code with code tags:
    [code=java]
    YOUR CODE HERE
    [/code]
    to get highlighting and preserve formatting.
    If you don't understand my answer, don't ignore it, ask a question.

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    ATB (March 8th, 2014)

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    Default Re: Random number guessing game with three tries (loops)

    yes it does, and to print out the random number if the player loses would be the code below:
    if(hasWon) 
    	{
    		System.out.println("You win");
    		System.exit(0);
    	}
    	}
    		System.out.println("You lose" + "The random number was:" + target);
    		System.exit(0);
    	}

    and that compiles to :
    Guess a number:
    3
    Lower
    Guess a number:
    3
    Lower
    Guess a number:
    4
    Lower
    You loseThe random number was:2

    --- Update ---

    Thanks Norm!
    Last edited by ATB; March 8th, 2014 at 06:29 PM.

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