Method expanded

core/ctree/cnode.cpp:127–135

    }

    int CNode::expanded(){
        int child_num = this->children_index.size();
        if(child_num > 0) {
            return 1;
        }
        else {
            return 0;
        }
    }

    float CNode::value(){
        float true_value = 0.0;