Mode Program (java)

[demigod]

It seems really easy, but I just can't figure out how to find the mode. The decription of the program is as follows:

 

The mode of a list of numbers is the number listed most often. Write a program that takes 10 numbers as input and displays the mode of these numbers. Your program should use parallel arrays and a method that takes an array of numbers as a parameter and returns the maximum value in an array.

 

What I have so far is below. Any help would be appreciated.

 

 

 

 

import java.util.ArrayList;

import TerminalIO.KeyboardReader;

 

public class modeFinder

{

public static void main(String [] args){

 

KeyboardReader reader = new KeyboardReader();

int[] numbers = new int[10];

int[] mode = new int[11];

 

double total = 0;

int num;

int i = 0;

int j = 0;

int cc = 1;

int modenum = 0;

 

 

for (i = 0; i <= 9; i++)

{

num = reader.readInt("Enter an integer: ");

numbers = num;

}

 

for (i = 0; i <= 9; i++)

{

for (j = 0; j <= 9; j++)

{

if (numbers == numbers[j])

{

mode = cc;

}

}

}

 

for (i = 0; i <= 9; i++)

{

if (mode > mode[i+1])

{

modenum = i;

}

}

System.out.println("Mode: " + numbers[modenum]);

}

}

[markiemrboo]

When it says 'parallel arrays', I am guessing he wants you to use atleast two arrays to do this? I think if you sorted the original array you could probably do it with just the original array and a couple of variables maybe, otherwise I can only think of a way to do it with.. the original array of numbers and.. two extra arrays? Is that OK?

[cchalogamer]

first no need to imort ArrayList since your using static arrays. Second, Are you taking the AP computer Science A/AB exam in May or are you taking this in college? Ill have to think a second as to how to do this the way the assignment says bc i would have approached it very differently. Once i code it ill try to give you a hint.

 

EDIT: ok why in the HELL do you need "parrallel" arrays. I would code it to scan several times.....wait... humm crap btw use the

 code here 

tags to make your ocde more readable.

 

 

EDIT: ok again WTF?!?!? It says 1st find mode, next it says use parallel arrays (still dont now why) next it says you shouod use a method to find the max num in the array?????why mode doesnt need the max, mean would.....but I dont get it are these your exat directions typed? if not type it out EXACLTLY as the assignment reads then ill look at ti again, otherwise this is a really crappy assignment.

Edited April 21, 2005 by cchalogamer

[markiemrboo]

Badly worded perhaps? Probly just means the maximum value as like, the value that occurs most.

 

But yeah, you're right.. doesn't actually seem to need another array :s

 

EDIT: Actually, that was a little wrong Oops

 

EDIT: Has an assignment the wrong way around, should work properly now.. I think...

 

import java.util.Random;

public class Mode {
      public static void main(String args[]) {
             // random numbers for me to test with
             Random rndGen = new Random();
             int numbers[] = new int[10];

             for (int i = 0; i < numbers.length; i++) {
                 // change this to your keyboard input line
                 numbers[i] = rndGen.nextInt(10) + 1;
             }

             int occur = 0;
             int tmpOccur = 0;
             int mode = 0;

              for (int i = 0; i < numbers.length; i++) {
                 for (int j = 0; j < numbers.length; j++) {
                     if (numbers[j] == numbers[i]) {
                        tmpOccur++;
                        modes[j] = tmpOccur;
                     }
                 }

                 if (tmpOccur >= occur) {
                    occur = tmpOccur;
                    mode = i;
                 }

                 tmpOccur = 0;
             }

             System.out.println("mode = " + mode);
      }
}

 

Buut it doesn't use parallel arrays so I aint sure how much use it is to you. You could change it so it'll use a parallel array but that would be totally pointless...

 

EDIT : aaand you could probably do better than that by not looping from min to max

[demigod]

Yeah, those were the actual instructions typed. No, I don't think I will be taking the AP exam, I pretty much am a crappy programmer. Thanks for your help, I'll figure out something.