Question

Write a Java method called zero_some with one parameter x that is an array of double numbers. The method changes x[0], x[2], x[4], ... , all to zero. If you activate zero_some(a) for an actual array a of length 6, which components of a will be changed to zero?

Answer 1

The Java method 'zero_some' changes every other element (at even indices) in an array to zero. For an array 'a' of length 6, it will set a[0], a[2], and a[4] to zero.

Step-by-step explanation:

The question pertains to writing a Java method named zero_some that takes an array of double numbers as a parameter. The method's purpose is to change every other element in the array, starting from the index 0, to zero. In other words, it sets the elements at the even indices of the array to zero. When this method is called with an array of length 6, the following elements' indices will be changed to zero: 0, 2, 4.

Here's how you could write such a method:

public static void zero_some(double[] x) {
for(int i = 0; i < x.length; i += 2) {
x[i] = 0.0;
}
}

Calling zero_some(a) where a is an array of double numbers of length 6 will change a[0], a[2], and a[4] to zero.