Question

PLEASE USE LOOPS ONLY TO COMPLETE THIS ASSIGNMENT.

(Find the three lowest scores)
Write a program that prompts the user to enter the number of students and each student’s name and score, and finally displays the student with the lowest score and the student with the second-lowest score and the student with the third lowest score.

Program must accept first name only or first and last name

SAMPLE RUN #1: java ThreeLowestScores  

Enter the number of students:6↵
Student 1 of 6↵
Enter·student's name: Tucker Mansfield↵
Enter student's score: 33.33↵
Student 2 of 6↵
Enter student's name: Barbara Stevenson↵
Enter student's score: 89.56↵
Student 3 of 6↵
Enter student's name: Scott↵
Enter student's score: 78.80↵
Student 4 of 6↵
Enter student's name: Amy Rickstein↵
Enter student's score: 93.3↵
Student 5 of 6↵
Enter student's name:Thomas Collins↵
Enter student's score:96.7↵
Student 6 of 6↵
Enter student's name: Richard Goldstein↵
Enter student's score:85.5↵
The lowest score was 33.33 and Tucker Mansfield got it↵
The second lowest score was 78.80 and Scott got it↵
The third lowest score was 85.5 and Richard Goldstein got it↵

PLEASE USE LOOPS ONLY TO COMPLETE THIS ASSIGNMENTS.

Answer 1

// ThreeLowestScores.java : Java program to input names and scores of n students and display the lowest 3 scores

import java.util.Scanner;

public class ThreeLowestScores {

   public static void main(String[] args)
   {
       int n, j;
       String[] names;
       double[] scores;
      
       String name;
       double score;
      
       Scanner scan = new Scanner(System.in);
       // input the number of students
       System.out.print("Enter the number of students: ");
       n = scan.nextInt();
       scan.nextLine(); // ignore \n left by nextInt
      
       if(n > 0) // validate number of students > 0
       {
           // create arrays to store names and scores of size n
           names = new String[n];
           scores = new double[n];
          
           // loop to input names and scores of n students and insert it into arrays in sorted order of score (ascending i.e lowest to highest)
           for(int i=0;i<n;i++)
           {
               // input the student name and score
               System.out.println("Student "+(i+1)+" of "+n);
               System.out.print("Enter student's name: ");
               name = scan.nextLine();
               System.out.print("Enter student's score: ");
               score = scan.nextDouble();
               scan.nextLine();
              
               j = i-1;
               // loop to insert the read name and score in array in sorted order by score (i.e lowest to highest)
               while(j >= 0 && scores[j] > score)
               {
                   scores[j+1] = scores[j];
                   names[j+1] = names[j];
                   j--;
               }
              
               scores[j+1] = score;
               names[j+1] = name;
           }
          
           // loop to display the lowest 3 scores
           for(int i=0;i<n;i++)
           {
               if(i == 0)
                   System.out.println("The lowest score was "+scores[0]+" and "+names[0]+" got it");
               else if(i == 1)
                   System.out.println("The second lowest score was "+scores[1]+" and "+names[1]+" got it");
               else if(i == 2)
                   System.out.println("The third lowest score was "+scores[2]+" and "+names[2]+" got it");
               else
                   break;
           }
          
       }else
           System.out.println("Number of students must be greater than 0");
      
   }
}

// end of ThreeLowestScores.java

Output: