Question

In this homework, create two arrays – studentName and studentScore (String and Int types). Write a method (getData) that would ask user to enter a set of data – for example, five student names and corresponding scores.

This program should also have the following methods:

    getSum. This method should accept a studentScore array as its argument and return the sum of the values in the array.

    getAverage. This method should accept a studentScore array as its argument and return the average of the values in the array. Note: this should use getSum method to get the total.

    printHighest. This method should accept both arrays as its arguments, determine the highest value in the array, and print the highest value along with the student name who earned the highest score.

    printLowest. This method should accept both arrays as its arguments, determine the lowest value in the array, and print the lowest value along with the student name who earned the highest score.

printAboveAvg. This method should accept both arrays as its arguments, determine the average score (using getAverage method), and then list students who earned score above the average.

printBelowAvg. This method should accept both arrays as its arguments, determine the average score (using getAverage method), and then list students who earned score below the average.

Answer 1

Screenshot

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Program

import java.util.Scanner;

public class StudentScoreCalculation {
   //Count of students
   public static int count;
   //Scanner object
   public static Scanner sc=new Scanner(System.in);
   public static void main(String[] args) {
       //Prompt for number of students
       System.out.print("Enter number of students going to enter: ");
       count=sc.nextInt();
       sc.nextLine();
       //Create two arrays for student name and score
       String[] studentName=new String[count];
       int[] studentScore=new int[count];
       //Call method to get students information
       getData(studentName,studentScore);
       //call method to print highest scored student details
       printHighest(studentName,studentScore);
       //call method to print lowest scored student details
       printLowest(studentName,studentScore);
       //call method to print above average scored student names
         printAboveAvg(studentName,studentScore);
       //call method to print below average scored student names
         printBelowAvg(studentName,studentScore);

   }
     //Get information about students
   public static void getData(String[] names,int[] scores) {
       for(int i=0;i<count;i++) {
           System.out.print("Enter name of student "+(i+1)+": ");
           names[i]=sc.nextLine();
           while(names[i].equals("")) {
               System.out.print("Enter name of student "+(i+1)+": ");
               names[i]=sc.nextLine();
           }
           System.out.print("Enter score of student "+names[i]+": ");
           scores[i]=sc.nextInt();
           sc.nextLine();
           while(scores[i]<0) {
               System.out.print("Enter score of student "+names[i]+": ");
               scores[i]=sc.nextInt();
               sc.nextLine();
           }
       }
   }
   //Get sum of all scores
   public static int getSum(int[] scores) {
       int sum=0;
       for(int i=0;i<count;i++) {
           sum+=scores[i];
       }
       return sum;
   }
   //Get Average of all scores
       public static double getAverage(int[] scores) {
           int sum=getSum(scores);
           return (double)sum/count;
       }
       //Method to print highest scored student details
       public static void printHighest(String[] names,int[] scores) {
           int highest=0,index=-1;
           for(int i=0;i<count;i++) {
               if(highest<scores[i]) {
                   highest=scores[i];
                   index=i;
               }
           }
           System.out.println("Highest scored student is "+names[index]+ " with score "+highest);
       }
       //Method to print lowest scored student details
               public static void printLowest(String[] names,int[] scores) {
                   int lowest=scores[0],index=0;
                   for(int i=1;i<count;i++) {
                       if(lowest>scores[i]) {
                           lowest=scores[i];
                           index=i;
                       }
                   }
                   System.out.println("Lowest scored student is "+names[index]+ " with score "+lowest);
               }
           //Method to print above average students
           public static void printAboveAvg(String[] names,int[] scores) {
               double avg=getAverage(scores);
               int cnt=0;
               System.out.println("Above average "+avg+" students are: ");
               for(int i=0;i<count;i++) {
                   if(scores[i]>avg) {
                       cnt++;
                       System.out.println(names[i]);
                   }
               }
               if(cnt==0) {
                   System.out.println("No students has above average!!!");
               }
           }
           //Method to print below average students
           public static void printBelowAvg(String[] names,int[] scores) {
               double avg=getAverage(scores);
               int cnt=0;
               System.out.println("Below average "+avg+" students are: ");
               for(int i=0;i<count;i++) {
                   if(scores[i]<avg) {
                       cnt++;
                       System.out.println(names[i]);
                   }
               }
               if(cnt==0) {
                   System.out.println("No students has below average!!!");
               }
           }
}

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Output

Enter number of students going to enter: 5
Enter name of student 1: Micheal Jackson
Enter score of student Micheal Jackson: 82
Enter name of student 2: Harry Potter
Enter score of student Harry Potter: 95
Enter name of student 3: Gyan Gill
Enter score of student Gyan Gill: 65
Enter name of student 4: Mariya Tom
Enter score of student Mariya Tom: 48
Enter name of student 5: Millan Mark
Enter score of student Millan Mark: 42
Highest scored student is Harry Potter with score 95
Lowest scored student is Millan Mark with score 42
Above average 66.4 students are:
Micheal Jackson
Harry Potter
Below average 66.4 students are:
Gyan Gill
Mariya Tom
Millan Mark