VectorOperations

[NeWoX]

I want different operations to be done to all the numbers in an array using methods for each operation. I can't really point out where the errors are in the code.

public class VektorOperations {
	public static void main(String[] args) {

		double[] a = { 0.14, 23.5, 33.4, 17.4, 89.76 };
		add(7.3, a);
		invert(a);
		mult(34.0, a);

	}

	public static void mult(double add, double[] a) {

		double b = 7.3;

		for (double y : a) {
			System.out.print(b * y + " ");
			// this method is supposed to take a float and an array of floats as
			// parameters
			// and perform a multiplication of the given float to all array elements

		}

	}

	public static void add(double invert, double[] a) {
		double c = 34.0;

		for (double y : a) {
			System.out.print(c + y + " ");
			// This method has as task to take a float and an array of floats as
			// parameters
			// and perform an addition of the given float to all array
			// elements

		}
	}

	public static void invert(double[] a) {
		int x = 1;

		for (double y : a) {
			System.out.print(x / y + " ");
			// The method above is supposed to take an array of floats and
			// perform
			// an inversion (1 divided by x) of any array element

		}

	}
}

The output should look something like this: 4.56989247311828 1.1038961038961037 0.8353808353808354 1.376518218623482 0.3502987842571605

put the foregoing code prints: 1.022 171.54999999999998 243.82 127.01999999999998 655.248 7.142857142857142 0.0425531914893617 0.029940119760479042 0.0574712643678161 0.011140819964349376 34.14 57.5 67.4 51.4 123.76

Do anyone know what I should do?
best regards//