What is the average height of a tree in terry's front yard?

Question

1.00/5 (1 vote)

See more:

There are N trees in Terry's front yard. He is supposed to measures the height of each tree and find the average height of trees in his yard. What is the average height of a tree in Terry's front yard?

Note:- Print your answer as floor value (average height)
Input
The first line contains N: numbers of tree.
Then follows N lines represents the height of each tree.

Constraint:-
1 <= n <= 100000
1 <= a[i] <= 100000
Output
Print the average height of all the trees in the yard

What I have tried:

Java

<pre>import java.io.*; // for handling input/output
import java.util.*; // contains Collections framework

// don't change the name of this class
// you can add inner classes if needed
class Main {
	public static void main (String[] args) {
                      // Your code here
		Scanner scan = new Scanner(System.in);
		int total_trees = scan.nextInt();
		int[] tree = new int[total_trees];
		for (int i=0; i< total_trees; i++) {
			tree[i] = scan.nextInt();
		}
		Arrays.sort(tree);
		int n = 0;
		int[] a = new int[total_trees];
		for(int i =0; i< total_trees; i++) {
			while(i < total_trees -1 && tree[i]==tree[i+1]){
				i++;
			}
				a[n] = tree[i];
				n++;
		}
		int sum = 0;
		for (int i=0; i<n; i++){
			sum += a[i];
		}
		int avg = (int)Math.floor((float)sum/n);
		System.out.println(avg);

	}
}

Posted 11-Dec-21 14:22pm

A S Lokanadhan

Updated 11-Dec-21 18:27pm

Add a Solution

Comments

Patrice T 11-Dec-21 21:49pm

And you have a question or problem with this code ?

A S Lokanadhan 11-Dec-21 21:54pm

Is the program is correct? I have got some hidden test cases wrong. I'm doing it for an assignment. Can you help me?

Patrice T 11-Dec-21 22:17pm

Use Improve question to update your question.
So that everyone can pay attention to this information.

3 solutions

Solution 1

Quote:
Is the program is correct? I have got some hidden test cases wrong.

Depends on what you think.
Do you think these inputs should give same answer ?
3
1 11 21

12
1 1 1 1 1 1 1 1 1 1 11 21

12
1 11 21 21 21 21 21 21 21 21 21 21

I don't think so, but as far as I understand,it is what your program is doing.

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your code is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]

jdb - The Java Debugger[^]
https://www.jetbrains.com/idea/help/debugging-your-first-java-application.html[^]

The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

Posted 11-Dec-21 16:48pm

Patrice T

Solution 2

Why do you sort the array? Averages don't depend on order.

What is the second array for???

Why do you need an array at all? All it takes is summing the input values.

Why are you using integers for heights, the problem statement wasn't clear about that issue; the input could well be:

5
1.1
2.2
3.3
4.4
5.5

Posted 11-Dec-21 18:09pm

Luc Pattyn

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

A S Lokanadhan · Accepted Answer · 2021-12-11T18:27:00