Method add

test/StackOverflow.java:2–8

(int[] numbers, int offset, int length)

public class StackOverflow {
  private static int add(int[] numbers, int offset, int length) {
    if (length == 0) {
      return 0;
    } else {
      return numbers[offset] + add(numbers, offset + 1, length - 1);
    }
  }
  private static int add(int ... numbers) {
    return add(numbers, 0, numbers.length);
  }