Question

java programming

write a program with arrays to ask the first name, middle initial, last name and id# and 3 test scores of 10 students. calculate the average of the 3 test scores. show the highest class average and the lowest class average. also show the average of the whole class.

please use basic codes and arrays with loops

please use printf to format output

sample output

First name MI    Last name    ID# Test1    Test2 Test 3    Average

Sid    s jacobs    a999 90    90    90    90

Mike f    scott    b999 80    80    80    80

The class average is 90

the highest average is 90

the lowest average is 90

Please input for 10 students

Answer 1

Java Program:

import java.util.Scanner;

public class StudentTest {

   public static void main(String[] args) {
       // Scanner class object to read input
       Scanner scan = new Scanner(System.in);
      
       //array declarations
       String[] firstName = new String[10];
       String[] middileInitial = new String[10];
       String[] lastName = new String[10];
       String[] ID = new String[10];
       float[][] testScores = new float[10][3];
       float[] average = new float[10];
      
       //variables to calcualte averages
       float classAvg = 0;
       float highestAvg = 0;
       float lowestAvg = 0;
      
       //loop to enter for 10 students
       for(int i=0;i<10;i++) {
           System.out.print("Enter your first name:");
           firstName[i] = scan.next();
          
           System.out.print("Enter your middle initial:");
           middileInitial[i] = scan.next();
          
           System.out.print("Enter your last name:");
           lastName[i] = scan.next();
          
           System.out.print("Enter your ID#:");
           ID[i] = scan.next();
          
           float sumTestScores = 0;
           //asking 3 test scores
           for(int j=0;j<3;j++) {
               System.out.print("Test"+(j+1)+":");
               testScores[i][j] = scan.nextInt();
              
               //adding up 3 test scores
               sumTestScores = sumTestScores + testScores[i][j];
           }
          
           //for calculating average of 3 test scoresW
           average[i] = (float)sumTestScores/3;
          
           //for calculating highest average
           if(average[i] > highestAvg) {
               highestAvg = average[i];
           }
          
           //for calculating lowest average
           if(i>0) {
               if(lowestAvg > average[i]) {
                   lowestAvg = average[i];
               }
           }else {
               lowestAvg = average[i];
           }
           System.out.print("\n");
       }

       //displaying output to consolse
       System.out.printf("First name\tMI\tLast name\tID#\tTest1\tTest2\tTest3\tAverage\n");
       for(int i=0;i<10;i++) {
                      
           System.out.printf("%s\t\t%s\tt%s\t%s\t",firstName[i],middileInitial[i],lastName[i],ID[i]);
          
           //to display test scores
           for(int j=0;j<3;j++) {
               System.out.printf("%.2f\t",testScores[i][j]);

classAvg = classAvg + testScores[i][j]; //calculating the class average
           }
           System.out.printf("%.2f",average[i]);
           System.out.print("\n");          
       }

       //to display averages
       System.out.printf("The class average is %.2f",classAvg);
       System.out.printf("\nThe highest average is %.2f",highestAvg);
       System.out.printf("\nThe lowest average is %.2f",lowestAvg);
   }

}
Output:

Console 3 <terminated> StudentTest [Java Application] C:\Program Files\Java\jre1.8.0_221\bin\javaw.exe (Aug 7, 2019, 12:06:11 AM) Enter your first name: Sid Enter your middle initial:s Enter your last name: Enter your ID#: a999 Test1:90 Test2:90 Test3:90 Enter your first name:Mike Enter your middle initial:f Enter your last name: scott Enter your ID# : b999 Test1:80 Test2:80 Test3:80 First name Last name Test2 MI ID# Test1 Test3 Average jacobs a999 Sid 90.00 90.00 90.00 90.00 Mike f b999 80.00 80.00 scott 80.00 80.00 The class average is 0.00 The highest average is 90.00 The lowest average is 80.00