void test
{
    vector<int>::iterator p1;
    vector<int> vec;

    vec.push_back(1);
    vec.push_back(2);

    p1 = vec.begin();

    while ( p1!= vec.end())
    {
      xyz(p1);

      p1++;
    }
}


void xyz(int* i)
{
 //do something here
}