问C++中的效率

EN

#include <iostream>
#include <vector>


using namespace std;

class Node;
class Set;


class Node {
    public:
        Node(double, Set*);
        Node();
        double value;
        Set * nextSet;
};
class Set {
    public:
        Set(vector<Node *>);
        Set();
        vector<Node *> nodes;
};
class NeuralNet {
    public:
        Set * firstSet;
};
Node::Node(double val, Set * newSet){
    value = val;
    nextSet = newSet;
}
Set::Set(vector<Node *> input){
    nodes = input;
}
Node::Node(){
    Set temp;
    nextSet = &temp;
}
Set::Set(){
    vector<Node *> temp;
    nodes = temp;
}
void setUpNeuralNetRecursive(Set * curSet, int curDepth){
    if(curDepth<9){
        for(int i=0;i<9;i++){
            Set newSet;
            Node newNode(1,&newSet);
            (*curSet).nodes.push_back(&newNode);
            setUpNeuralNetRecursive(&newSet, curDepth+1);
        }
    }
}
void setUpNeuralNet(NeuralNet net){
    Set newSet;
    net.firstSet=&newSet;
    setUpNeuralNetRecursive(&newSet, 0);
}
int main()
{
    cout << "Setting up neural network.  This may take up to 3 minutes." << endl;
    NeuralNet net;
    setUpNeuralNet(net);
    cout << "Setup ended." << endl;

    return 0;
}