/************************************************************

  C151 Spring 2021
  Dana Vrajitoru
  SumArray.java

  A program that inputs a list of real numbers, stores it
  in an array, and outputs the sum of these numbers.

*************************************************************/

// package sumar;

import java.util.Scanner;

public class SumArray {
    
    static int size;
    static float [] numbers;
    static Scanner scan = new Scanner(System.in);

    // A function that assign 0.0 to each element of the array.
    static void initArray(int n)
    {
        numbers = new float[n];
        size = n;
        for (int i = 0; i < size; i++)
            numbers[i] = 0.0f;
    }

    // A function that inputs the elements of an array .
    static void inputArray()
    {
        try {
            System.out.println("Enter the number of elements in the array");
            size = scan.nextInt();
            initArray(size);
            
            for (int i = 0; i < size; i++) {
                System.out.println("Enter the element number " + i);
                numbers[i] = scan.nextFloat();
            }
        }
        catch (Exception e) {
            System.out.println("An error happened");
        }
    }

    // A function that computes the sum of the elements of an array.
    static float computeSum()
    {
        float sum = 0;
        for (int i = 0; i < size; i++)
            sum = sum + numbers[i];
        return sum;
    }

    public static void main(String[] args) {

        // Input the numbers
        inputArray();

        // Compute and output the sum
        System.out.println("The sum of these numbers is " + computeSum());
    }
}

/******************* Example of program output *************

Enter the number of elements in the array
5
Enter the element number 0
2.15
Enter the element number 1
3.14
Enter the element number 2
60
Enter the element number 3
19.5
Enter the element number 4
2.41
The sum of these numbers is 87.2

*************************************************************/