Rotate n times an array elements

nleftRotations.cpp

vector<int> rotLeft(vector<int> a, int d) {
    vector<int> rotations(a.size(), -1);
    for (int i = 0; i < a.size(); i++) {
        // Get right moves formula = a.length - left Rotaions
        int rightMoves = a.size() - d;
        // Get the next index position of our current number
        int newIndex = (i + rightMoves) % a.size(); // Circular array right
        rotations[newIndex] = a[i];
    }
    return rotations;
}