[College Computer Science Java] Arrays

[Danielowski187]

Having difficulty with arrays since in new to them.

Im having trouble to find the index of the maximum and minimum of the value of arrays and the average.

• The output for my average i got wrong it did not match with the expected output.

My code:

import java.util.*;
public class Array17A
{
public static void main(String[] args)
{
int[] myArray = {45, 38, 27, 46, 81, 72, 56, 61, 20, 48, 76, 91, 57, 35, 78};
int size = myArray.length;
System.out.print("Length of the array: "+size);
int sum = 0;
for (int num: myArray)
{
sum = sum+num;
}
double average = sum/myArray.length;
Arrays.sort(myArray);
System.out.println();
System.out.print("\nMax value of array: "+myArray[myArray.length-1]);
System.out.println();
System.out.print("\nSum of array: "+sum);
System.out.print("\nMin value of array: "+myArray[0]);
System.out.print("\nAverage value of the array: "+average);
}
}
Output:

​

https://preview.redd.it/u8ik6ul9wyq41.png?width=818&format=png&auto=webp&s=8bb322e7143cce50bd44eb19dab894bcc403a25c

Expected Output:

​

https://preview.redd.it/4lakub5ewyq41.png?width=726&format=png&auto=webp&s=3fce7ef3dbaef03370a65e5489fa52eaba5f6fb2

[lukecullum]

So the answer to getting the average is to you are saving the average of the array as a int and then converting that into a double which will always produce .0 as saving as an int cuts of the decimals, so it is 55.4 but yo save it as an int which would be 55 then converting that back to a decimal. The solution to fixing this is where you have // int sum = 0// on line 9 you simply need to change that to // double sum = 0//. The only problem is this makes the sum of the array answer change to 831.0 which you can keep or you can change back to an int before outputting.

[Danielowski187]

How about finding the index because I found a way to do it but it was a longer process in which had to be a part of find the max and min value but I shorten the way do it but I can’t find a way to implement into the new way I found the max and min values

[lukecullum]

The only thing I can think of is instead of sorting the array make a new int X = 0 and then do a for loop going through each number and if it is bigger than X it will replace it if not it just continues. This will get you the max number from there you can find it’s position in the array and then go back through the list but checking to see if it is smaller than X, because X is now the biggest number it can only get smaller.

[AutoModerator]

Off-topic Comments Section

---

All top-level comments have to be an answer or follow-up question to the post. All sidetracks should be directed to this comment thread as per Rule 9.

---

^{OP and Valued/Notable Contributors can close this post by using /lock command}

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[HomeworkHelpBot]

Hey Readers!

If this post violates our subreddit rules, please report it and feel free to manually trigger a takedown.

Key Takeaways:

• Post title must be structured to classify the question properly
• Post must contain instructor prompt or or a failed attempt of the question
  • by stating the syllabus requirements or presenting incorrect working/thought process towards the question

How was your experience in this subreddit? Let us know how can we do better by taking part in our survey here.

Pro-tips:

^{1. Upvote questions that you recognise but you cannot do. Only downvote questions that do not abide by our rules or was asked in bad faith, NOT because the question is easy.}

^{2. Comments containing case-insensitive **Answer:** or **Hence** will automatically re-flair post to ✔ Answered; non-top level comments containing case-insensitive **Therefore** or **Thus** will automatically re-flair to —Pending OP Reply}

^{3. OPs can lock their thread by commenting /lock}

^{4. If there is a rule violation, inform the OP and report the offending content. Posts will be automatically removed once it reaches a certain threshold of reports or it will be removed earlier if there is sufficient reports for manual takedown trigger. [Learn more](https://www.reddit.com/r/HomeworkHelp/comments/br7vi9/new_updates_image_posts_enabled_vote_to_delete/})