knn implementation problem

[zhenfelix]

your implementation of

    std::vector<double> kNN::nearestNeighbors(std::vector<double> x){
        LinAlg alg;
        // The nearest neighbors
        std::vector<double> knn;

        std::vector<std::vector<double>> inputUseSet = inputSet;
        //Perfom this loop unless and until all k nearest neighbors are found, appended, and returned
        for(int i = 0; i < k; i++){
            int neighbor = 0;
            for(int j = 0; j < inputUseSet.size(); j++){
                bool isNeighborNearer = alg.euclideanDistance(x, inputUseSet[j]) < alg.euclideanDistance(x, inputUseSet[neighbor]);
                if(isNeighborNearer){
                    neighbor = j;
                }
            }
            knn.push_back(neighbor);
            inputUseSet.erase(inputUseSet.begin() + neighbor); // This is why we maintain an extra input"Use"Set
        }
        return knn;
    }

is wrong. Given a list of inputSet and x, assuming the inputSet is sorted in ascending order according to their distance to x, your implementation will output a list in index zero