Question

IN JAVA

Write a program that uses a two-dimensional array to store daily minutes walked and carb intake for a week. Prompt the user for 7 days of minutes walked and carb intake; store in the array.   Write a sort ( your choice which sort ) to report out the sorted minute values -lowest to highest. Write another to report out the sorted carb intake - highest to lowest. These methods MUST be your original code.   Your program should output all the values in the array and then output the 2 sorted outputs.   You must use an array to receive credit for this assignment.

Your code MUST be your own work and should not be copied from another student, website or any other source. You will be required to complete a sort of an array (or two) in your final lab - making this lab very important to get correct. Make sure you write all the methods listed above for full credit.

Answer 1

If you have any problem with the code feel free to comment.

Program

import java.util.Scanner;

public class Test {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);// for taking console input
      
       int[][] ar = new int[7][2];
      
       //taking use input
       for(int i=0; i<ar.length; i++) {
           System.out.print("Enter minutes walked: ");
           ar[i][0] = sc.nextInt();
           System.out.print("Enter carbs: ");
           ar[i][1] = sc.nextInt();
           System.out.println();
       }
      
       System.out.println("Sorting by Minutes Walked");
       sortByWalkingMinutes(ar);
       display(ar);
      
       System.out.println();
      
       System.out.println("Sorting by Carbs");
       sortByCarbs(ar);
       display(ar);
      
       sc.close();
   }
  
   /*using selection sort*/

   public static void sortByWalkingMinutes(int[][] ar) {
       for (int i = 0; i < ar.length; i++) {
           int min = i;
           for (int j = i; j < ar.length; j++) {
               if (ar[min][0] > ar[j][0])
                   min = j;
           }

           //swpaing values
           int temp = ar[min][0];
           int temp2 = ar[min][1];
          
           ar[min][0] = ar[i][0];
           ar[min][1] = ar[i][1];
          
           ar[i][0] = temp;
           ar[i][1] = temp2;
       }
   }
  
   //sorting in reverse order
   public static void sortByCarbs(int[][] ar) {
       for (int i = 0; i < ar.length; i++) {
           int min = i;
           for (int j = i; j < ar.length; j++) {
               if (ar[min][1] < ar[j][1])
                   min = j;
           }

           //swaping values
           int temp = ar[min][1];
           int temp2 = ar[min][0];
          
           ar[min][1] = ar[i][1];
           ar[min][0] = ar[i][0];
          
           ar[i][1] = temp;
           ar[i][0] = temp2;
       }
   }

   //displaying 2d array
   public static void display(int[][] ar) {
       System.out.println("Minutes Walked\tCarbs");
       for(int i=0; i<ar.length; i++) {
           for(int j=0; j<ar[0].length; j++) {
               System.out.print(ar[i][j]+" \t\t");
           }
           System.out.println();
       }
   }
}

Output

<terminated> Test (1) [Java Application] C:\Program FilesJava\jre1.8.0_211\bin\javaw.exe (12-Nov-2019, 2:07:39 pm) LIILC NaINCu. LITULCS Enter carbs: 870 Enter minutes walked: 36 Enter carbs: 1200 Enter minutes walked: 49 Enter carbs: 1125 Enter minutes walked: 62 Enter carbs: 1247 Enter minutes walked: 58 Enter carbs: 1320 Enter minutes walked: 54 Enter carbs: 1041 Sorting by Minutes Walked Minutes Walked Carbs 25 900 36 1200 42 870 49 1125 1041 54 58 1320 62 1247 Sorting by Carbs Minutes Walked Carbs 58 1320 62 1247 36 1200 1125 49 1041 54 25 900 42 870