Question

Change your program to additionally handle the operation “px” where x is a number from 10 to 90 and defines the x percentile of the list of numbers. E.g.: Input.txt: Min: 1,2,3,5,6 Max: 1,2,3,5,6 Avg: 1,2,3,5,6 P90: 1,2,3,4,5,6,7,8,9,10 Sum: 1,2,3,5,6 P70: 1,2,3 ● Your output.txt should read: The min of [1,2,3,5,6] is 1. The max of [1,2,3,5,6] is 6. The avg of [1,2,3,5,6] is 3.4. The 90th percentile of [1,2,3,4,5,6,7,8,9,10] is 9. The sum of [1,2,3,5,6] is 17. The 70th percentile of [1,2,3] is 2. ● Compile, save and run your file

PLEASE ADD THE ANSWER TO THIS CODE

import java.io.File;
import java.util.Arrays;
import java.util.Formatter;
import java.util.Iterator;
import java.util.Scanner;
import java.io.FileNotFoundException;
import java.io.PrintWriter;

public class MyFile {
   public static void main(String[] args){
      
       try {
           File j = new File("C:\\Users\\NaharaY\\Dropbox\\Jesse -23263\\Introduction to Software Engineering\\Task 12\\input.txt");
           Scanner input = new Scanner(j);
           PrintWriter pw = new PrintWriter(new File("output.txt"));
           while(input.hasNext()) {
           String line = input.next();// store the line in a variable - eg. String line = input.next();
           String[] numOperation = line.split(":");// split the line on the semi-colon
           String operation = numOperation[0];// assign the operation to a variable at index 0 of operation_numbers
           String[] digits = numOperation[1].split(",");// assign the numbers to a variable using index 1 of operation_numbers - split the numbers on the commas
           int len = digits.length;
           int arr[] = new int[len];
           for(int i = 0; i < len; i++)
               arr[i] = Integer.parseInt(digits[i].trim());
           if(operation.equalsIgnoreCase("Min")) {
               int min = arr[0];
           for(int i = 0; i < len; i++) {
               if(min > arr[i])
                   min = arr[i];
           }
          
           pw.println("The min of " + Arrays.toString(arr) + " is " + min);
          
           }
          
           else if (operation.equalsIgnoreCase("Max")) {
               int max = arr[0];
           for(int i = 0; i < len; i++) {
               if(max < arr[i])
                   max = arr[i];
              
           }
          
           pw.println("The max of " + Arrays.toString(arr) + " is " + max);
          
           }
          
           else if(operation.equalsIgnoreCase("Avg")) {
               double avg = 0.0;
           for(int i = 0; i < len; i++) {
               avg += arr[i];
              
           }
          
           avg /= len;
          
           pw.println("The avg of " + Arrays.toString(arr) + " is " + avg);
          
           }
          
           }
          
           pw.close();
           input.close();
           }catch(FileNotFoundException e) {
               System.out.println("Error");
           }
   }
}

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;

public class MyFile {
        public static void main(String[] args) {

                try {
                        File j = new File(
                                        "input.txt"); // change the path
                        Scanner input = new Scanner(j);
                        PrintWriter pw = new PrintWriter(new File("output.txt"));
                        while (input.hasNextLine()) {
                                String line = input.nextLine();// store the line in a variable - eg. String line = input.next();
                                String[] numOperation = line.split(":");// split the line on the semi-colon
                                String operation = numOperation[0];// assign the operation to a variable at index 0 of operation_numbers
                                String[] digits = numOperation[1].split(",");// assign the numbers to a variable using index 1 of
                                                                                                                                // operation_numbers - split the numbers on the commas
                                int len = digits.length;
                                int arr[] = new int[len];
                                for (int i = 0; i < len; i++)
                                        arr[i] = Integer.parseInt(digits[i].trim());
                                
                                if (operation.equalsIgnoreCase("Min")) {
                                        int min = arr[0];
                                        for (int i = 0; i < len; i++) {
                                                if (min > arr[i])
                                                        min = arr[i];
                                        }

                                        pw.println("The min of " + Arrays.toString(arr) + " is " + min);

                                }

                                else if (operation.equalsIgnoreCase("Max")) {
                                        int max = arr[0];
                                        for (int i = 0; i < len; i++) {
                                                if (max < arr[i])
                                                        max = arr[i];

                                        }

                                        pw.println("The max of " + Arrays.toString(arr) + " is " + max);

                                }

                                else if (operation.equalsIgnoreCase("Avg")) {
                                        double avg = 0.0;
                                        for (int i = 0; i < len; i++) {
                                                avg += arr[i];

                                        }

                                        avg /= len;

                                        pw.println("The avg of " + Arrays.toString(arr) + " is " + avg);

                                }

                                else if (operation.equalsIgnoreCase("Sum")) {
                                        double sum = 0.0;
                                        for (int i = 0; i < len; i++) {
                                                sum += arr[i];

                                        }

                                        pw.println("The sum of " + Arrays.toString(arr) + " is " + sum);
                                }

                                else if (operation.startsWith("P")) {
                                        int perc = Integer.parseInt(operation.substring(1).trim());
                                        
                                        int index = (int) Math.floor(len * perc/100.0) - 1;

                                        pw.println("The " + perc + "th percentile of " + Arrays.toString(arr) + " is " + arr[index]);
                                }

                        }

                        pw.close();
                        input.close();
                } catch (FileNotFoundException e) {
                        System.out.println("Error");
                }
        }
}

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