Define two arrays x and f each of site 10 to pass the array

Define two arrays x and f. each of site 10, to pass the array to a function, named sum. In main: define array, pass arrays, print out the array and the results on screen In function sum, take arrays from main and sum the arrays using the formula below: sum = 0.5 sigma_i =1^size-1 (f_i + f_i+1)(x_i+1 - x_i)

Solution

FormulaSum.java :

package org.chegg;

import java.util.Scanner;

public class FormulaSum {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       int x[] = new int[10];
       int f[] = new int[10];
       System.out.println(\"Enter \'x\' array elements:\");
       for(int i=0;i<10;i++)
           x[i] = sc.nextInt();
       System.out.println(\"Enter \'f \'array elements:\");
       for(int i=0;i<10;i++)
           f[i] = sc.nextInt();
       double result = sum(x,f);
       System.out.println(\"\ x array:\");
       for(int i=0;i<10;i++)
           System.out.print(x[i]+\" \");
       System.out.println(\"\ f array:\");
       for(int i=0;i<10;i++)
           System.out.print(f[i]+\" \");
       System.out.println(\"\ Summation of arrays by using formula: \"+result);
   }
   public static double sum(int[] x,int[] f){
       double total = 0;
       for(int i=1;i<x.length-1;i++){
           total = total + (f[i]+f[i+1])*(x[i+1] - x[i]);
       }
       return (0.5 * total);
   }
}

Sample Input & output:

Enter \'x\' array elements:
43 87 89 44 32 56 77 86 54 10
Enter \'f \'array elements:
32 78 55 43 76 89 23 9 59 80

x array:
43 87 89 44 32 56 77 86 54 10
f array:
32 78 55 43 76 89 23 9 59 80
Summation of arrays by using formula: -3632.0