vector iterator STL

#include <iostream>
#include <vector>
#include <math.h>
#include <algorithm>
#include <cstdlib>

using namespace std;

template<class T> int g(vector<T> *obj){
    vector<T>::iterator p;
    int counter = 0;
    for (p = obj->begin(); p != obj->end(); p++){
        cout << **(p) << " ";
    }
    cout << endl;
    for (p = obj->begin(); p != obj->end(); p++){
        if (p + 1 != obj->end()){
            if (**(p + 1) < 0){
                **p = 0;
                counter++;
            }
        }
    }
    cout << endl;
    for (p = obj->end(); p != obj->begin(); p--){
        cout << **(p-1) << " ";
    }
    cout << endl;
    cout << "counter: ";
    return counter;
}

int main(){
    vector<double> doubleVector;
    vector<double>::iterator i;

    for (int i(1); i < 8; i++){
        double temp = pow(-1, i) * 2 * i ;
        doubleVector.push_back(temp);
    }

    vector<double*> pointer;
    for (i = doubleVector.begin(); i != doubleVector.end(); i++)
    {
        pointer.push_back(&(*i));
    }

    cout << endl;

    cout << g(&pointer) << endl;

    system("pause");
    return 0;
}