Answer to Question #348913 in Java | JSP | JSF for Dunga

Question

Write a program that initially requests

the user to enter the number of students

in a class. The program then proceeds to request the user to enter the marks (double) of these

students; these are to be inserted into an

array. Once all the marks have been entered,

your program shall have and use the below

functions

1. public static double sum(int [] array). Calculate & return sum of all marks.

2. Public static double[] sort(int []

array). Sort array containing marks.

3. public static double max(int []

array). Return highest mark.

4. public static double min(int [] array). Return lowest mark.

Answer 1

import java.util.Arrays;
import java.util.Scanner;

class Main {
    public static double sum(double[] array) {
        double s = 0;
        for (double element : array)
            s += element;
        return s;
    }

    public static double[] sort(double[] array) {
        double[] arrayCopy = array.clone();
        Arrays.sort(arrayCopy);
        return arrayCopy;
    }

    public static double max(double[] array) {
        double m = 0;
        for (double element : array)
            if (element > m)
                m = element;
        return m;
    }

    public static double min(double[] array) {
        double m = Double.MAX_VALUE;
        for (double element : array)
            if (element < m)
                m = element;
        return m;
    }

    public static void main(String[] args) {
        try (Scanner scanner = new Scanner(System.in)) {
            System.out.print("Enter the number of students in a class: ");
            int numberOfStudents = scanner.nextInt();
            double[] marks = new double[numberOfStudents];
            System.out.print("Enter the marks of students separating by spaces: ");
            for (int i = 0; i < numberOfStudents; i++)
                marks[i] = scanner.nextDouble();
            System.out.println("1. The sum of all marks: " + sum(marks));
            System.out.print("2. Sorted array of marks: ");
            for (double mark : sort(marks))
                System.out.print(mark + " ");
            System.out.println();
            System.out.println("3. The highest mark: " + max(marks));
            System.out.println("4. The lowest mark: " + min(marks));
        }
    }
}