arrays-exercise 04, slide 28

package class170629;

import java.util.Scanner;

public class arrays04 {

    public static void main(String[] args) {
        /*
         * Exercise 4, slide 28
         * input : 10 numbers to an array
         * output: add 1 to values in even keys, then print all numbers
         */

        // create a scanner
        Scanner s = new Scanner(System.in);

        // define an integer array, size=10
        int[] numbers = new int[10];

        System.out.printf("Enter %d integer numbers:\n", numbers.length);
        // get data from user and save it in the array
        for (int i = 0; i < numbers.length; i += 1) {
            numbers[i] = s.nextInt();
        }
        s.close();

        // print numbers before adding and add to even places
        System.out.print("Numbers before adding: ");
        for (int i = 0; i < numbers.length; i += 1) {
            System.out.printf("%d ", numbers[i]);
            // if even key add one to the value
            numbers[i] += i % 2 == 0 ? 1 : 0;
        }
        System.out.println();

        // print numbers after adding
        System.out.print("Numbers after adding: ");
        for (int i = 0; i < numbers.length; i += 1) {
            System.out.printf("%d ", numbers[i]);

        }
        System.out.println();
    }

}