Thread: Help with output

I have a question like this:

Say that a "clump" in an array is a series of 2 or more adjacent elements of the same value. Return the number of clumps in the given array.

e.g

countClumps({1, 2, 2, 3, 4, 4}) ? 2
countClumps{(1, 1, 2, 1, 2}) ? 2
countClumps({1, 1, 1, 1, 1}) ? 1

Here is my code:

import java.util.*;
import java.io.*;
import java.text.*;
import java.lang.*;
 
 
public class Program2 {
 
 
    int[] clumps = new int[100];
 
    public static void main(String[] args) {
 
        int index;
        Program2 program = new Program2();
 
        Scanner keyboard;
        keyboard = new Scanner(System.in);
 
        System.out.println("Please enter an array of numbers seperated by space:");
 
        for(index = 0;index <= program.clumps.length;index++)
            program.clumps[index] = keyboard.nextInt();
 
        System.out.print("countClumps({");
        for(index = 0;index <= program.clumps.length;index++)
            System.out.print(program.clumps[index] + ", ");
        System.out.print("}) ? " + program.countClumps(program.clumps));
    }
 
    public int countClumps(int[] nums) {
        int count = 0;
 
        for (int i = 0; i <= clumps.length; i++) {
            for (int j = 1; j <= clumps.length; j++) {
                if (clumps[i] == clumps[j])
                    count =+ 1;
            }
        }
        return count;
    }
 
}

The program compiles fine, but after I enter any array and press enter key doesn't seems to have anything going... Hope someone can clarify what I did wrong here...

can you say in detail how you get the count?

countClumps({1, 2, 2, 3, 4, 4}) ? 2 <--- does 2 means  2,2 and 4,4 ?
countClumps{(1, 1, 2, 1, 2}) ? 2  <--- why is it 2? there is only 1 pair of elements that are adjacent, ie 1,1
countClumps({1, 1, 1, 1, 1}) ? 1  <-- why is it 1?

Hi there.

Sorry about the sample output... The second one should be this:

countClumps{(1, 1, 2, 1, 1}) ? 2

For the last one, as we have two or more 1 that is the same as the 1 at position 0, so we count all of them as 1 clump

The 2 means, there are 2 pairs of clumps.. there is a 2 adjacent to the 2 at position 1. Similar to number 4, there is another adjacent 4 at position 5. Hence 2 clumps
Same explanation to sample 2

you can ask the user to enter the numbers by pressing the enter key.

public class Program2 {
 
    int[] clumps = new int[5];  // change to 5 for testing
    public static void main(String[] args) {
        int index;
        Program2 program = new Program2();
 
        Scanner keyboard = new Scanner(System.in);
 
        System.out.println("Please enter an array of numbers, press enter for new number:");
 
        // change for loop condition to index < program.clumps.length
        for(index = 0;index < program.clumps.length;index++)
            program.clumps[index] = keyboard.nextInt();
 
        System.out.print("countClumps({");
        for(index = 0;index < program.clumps.length;index++)
            System.out.print(program.clumps[index] + ", ");
        System.out.print("}) ? " + program.countClumps(program.clumps));
    }
 
    public int countClumps(int[] nums) {
        int count = 0;
 
        for (int i = 0; i < clumps.length; i++) {
            for (int j = 1; j < clumps.length; j++) {
                if (clumps[i] == clumps[j])
                    count =+ 1;
            }
        }
        return count;
    }
 
}

Thanks.

However, when I tried your code. The result for the first example does not return 2 but 1... Also, I assume the question are referring to user inputting any arbitrary number of elements in the array... Hence I am wondering if there is a way to automatically determine the size of the array to match the amount of elements users input?

sorry you are mistaken. Its not my code. Its your code . I did not do anything drastic to it
you can set the integer array size after you ask the user "how many numbers you want to enter? ". this is just a suggestion. I suppose also, that you are not allow to use Collections like ArrayList, where you can expand your array dynamically. If you have no restriction, then you might want to try using Arrays....

As for the logic of counting adjacent items, maybe you can declare another array to store the numbers

      for (int i = 0; i < clumps.length; i++) {
            for (int j = 1; j < clumps.length; j++) {
                if (clumps[i] == clumps[j])
                    count =+ 1;
                    anotherArray [ clumps[i] ] = count;  // just an idea...
            }
        }
        return count;

Thanks for the tips.

Will post back if I encounter further problem...