Question

java programming

write a program with arrays to ask the first name, last name, middle initial, IDnumber 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 the out put should look like this:

sample output

first name middle initial last name    ID    test score1 test score2 test score3

dhdh d djddj. 3456 20    80. 67

the class average is 80

the highest class average is80

the lowest class average is 80

please use printf to format the output

Answer 1

import java.util.*;

class Arrays
{
   public static void main (String[] args)
   {
       Scanner input = new Scanner(System.in);
      
       double[] testScore = new double[3];
       String[] firstName = new String[10];
       String[] lastName = new String[10];
       String[] middleInitial = new String[10];
       int[] idNum = new int[10];
       double[] avg = new double[10];
       double highest,lowest,average;
       highest = 0;
       lowest = 999;
       average = 0;
      
       System.out.println("Enter the number of students : ");
       int n = input.nextInt();
      
       for(int i=0;i<n;i++)
       {
       System.out.println("Enter first name : ");
       firstName[i] = input.next();
       System.out.println("Enter middle initial : ");
       middleInitial[i] = input.next();
       System.out.println("Enter last name :");
       lastName[i] = input.next();
       System.out.println("Enter Id Number : ");
       idNum[i] = input.nextInt();
      
       System.out.println("Enter the three test scores of the student : ");
       for(int j=0;j<3;j++)
       {
       testScore[j] = input.nextDouble();
       avg[i] = avg[i] + testScore[j];
       }
      
       avg[i] = avg[i]/3;
       if(highest < avg[i])
       highest = avg[i];
       if(lowest > avg[i])
       lowest = avg[i];
       average = average + avg[i];
      
       }
      
       average = average/n;
   System.out.printf("\nThe class average is %.2f", average);
   System.out.printf("\nThe highest class average is %.2f",highest);
   System.out.printf("\nThe lowest class average is %.2f",lowest);
      
   }
}

Output:

Enter the number of students : 5
Enter first name : Garry 
Enter middle initial : G. 
Enter last name :Trump 
Enter Id Number : 1001 
Enter the three test scores of the student : 80 94 95 
Enter first name :  Bran 
Enter middle initial : A. 
Enter last name :Aniston 
Enter Id Number : 1003 
Enter the three test scores of the student : 60 90 95 
Enter first name : Adam 
Enter middle initial : K. 
Enter last name :Lawrence 
Enter Id Number : 1002 
Enter the three test scores of the student : 70 90 95 
Enter first name : Anish 
Enter middle initial : L. 
Enter last name :Gupta 
Enter Id Number : 1004 
Enter the three test scores of the student : 90 90 95 
Enter first name : Smith 
Enter middle initial : K. 
Enter last name :Cooper 
Enter Id Number : 1005 
Enter the three test scores of the student : 80 60 55 

The class average is 82.60
The highest class average is 91.67
The lowest class average is 65.00

Do ask if any doubt. Please upvote.