Couve.java

import java.util.Arrays;
public class Couve {
    public static void scaledIncrement(double[] a, double s, double[] b) {
        for (int i = 0; i < a.length; i++)
            a[i] = a[i] + s * b[i];
    }

    public static void main(String[] args) {
        double[] a = {0, 3, 5, -1, 7, 0, 3, 2, 1, 5, 6, 7, 0, 1, 2, 3, 5, -1, 7, 0, 3, 2, 1, 5, 6, 7, 0, 1, 2, 1};
        double[] b = {3, 0, 5, 0.95, 7, 5, 3, 2, 1, 5, 6, 7, 0, 1, 2, 3, 0, 5, 0.95, 7, 5, 3, 2, 1, 5, 6, 7, 0, 1, 2};
        double c = 3;
        System.out.println(Arrays.toString(a));
        scaledIncrement(a, c, b);
        System.out.println("novo a:" + Arrays.toString(a));
        System.out.println(dotProduct(a, b));
        //System.out.println(Arrays.toString(scale(c, a)));
        Double[] arr = {4.2, 2.3333, 1., 9.};
        printArray(arr);
    }

    public static double dotProduct(double[] arr1, double[] arr2) {
        double produtoEscalar = 0;

        for (int i = 0; i < arr1.length; i++)
            produtoEscalar += arr1[i] * arr2[i];

        return produtoEscalar;
    }

    /*public static double[] scale(double s, double[] arr) {
        double[] ret = null;
        ret = new double[arr.length];
        for (int i = 0; i < arr.length; i++)
            ret[i] = s * arr[i];
        return ret;
    }*/
    public static void scale (double s, double[] arr) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = s * arr[i];
        }
    }


    private static void printArray(Object[] arr) {
        for (int i = 0; i < arr.length; i++)
            System.out.println("posicao" + i + ": " + arr[i]);
    }
}