A function

void A(
  1. List<int> o,
  2. List<int> a,
  3. List<int> b
)

Implementation

void A(final List<int> o, final List<int> a, final List<int> b) {
  for (int i = 0; i < 16; ++i) {
    o[i] = a[i] + b[i];
  }
}