Htykuut

I did look at the threads pertaining to randoms and implemented them into this assignment but I have 2 questions.

1) I need my program to generate random numbers (and print them) and count the iterations. I have counting the iterations down but I don't know why the random numbers don't print out. Does it have something to do with my guess = 0? Here's an example if I'm not clear.

Example: 

Enter a number: 13

85

89

73

94

13

This took 5 tries

2) I have no clue why my program always ends up stuck at one number for the answer. The program immediately ends after entering the number 86.

import java.util.*; 



public class FeelingLucky { 

    public static void main (String  args) { 

        Scanner sc = new Scanner (System.in); 



        int tries = 0; 

        int guess = 0;



        Random random = new Random(1); 

        int num = random.nextInt(100) + 1; 



        System.out.print("Pick a number between 1 and 100:"); 



        while (guess != num) { 

            guess = sc.nextInt(); 

            tries++; 

        }

        System.out.println("It took " + tries + " tries to match"); 

        sc.close();

    }

}

Random(1) uses seed in constructor which is always the same. Use just Random() - no parameter constructor.

import java.util.*;



public class FeelingLucky {

public static void main(String args) {



    Scanner sc = new Scanner(System.in);



    int tries = 0;

    int guess = 0;



    Random random = new Random(); // No seed

    int num = random.nextInt(100) + 1;



    System.out.print("Pick a number between 1 and 100:");



    while (guess != num) {

        guess = sc.nextInt();

        tries++;

    }

    System.out.println("It took " + tries + " tries to match");

    sc.close();



}

}

See Java random always returns the same number when I set the seed?

You've called nextInt() on the Random object only once, so you've only generated the one random number. Inside your loop you call nextInt() on the scanner, which is reading from System.in, so your program is halting and waiting for the user to input a number again each time around the loop.

If you want the user to enter a single number once, and then Random to keep generating numbers until they match, you'd need to swap which one is called inside the loop. To print the random numbers being generated, you'd need to add a print statement inside the loop that prints that current number.

while (guess != num) {

    num = random.nextInt(100) + 1;

    guess = sc.nextInt();

    System.out.printf("you guessed: %d the number was %d%n",guess, num);



    tries++;

}

This one will print out each time, and guess a new random number each time.