#include <vector>
#include <map>
#include <iostream>

using namespace std;

void vector_iterator(){
  vector<int> v;

  for( int i = 0; i < 10; i++ ){
    v.push_back(i);
  }
  
  vector<int>::iterator it = v.begin();

  while( it != v.end() ){
    *it = 0; // do something, in this case, we're just setting it to 0
    it++;
  }

  // or, using a for loop...
  for( it = v.begin(); it != v.end(); it++ ){
    cout << *it << endl;
  }
}

void map_iterator(){
  map<int, pair<int, int> > m;

  for( int i = 0; i < 10; i++ ){
    pair<int, int> p(i, i);
    m[i] = p;
  }

  for( map<int, pair<int, int> >::iterator it = m.begin(); it != m.end(); it++ ){
    cout << it->first << ": " << it->second.first << ", " << it->second.second << endl;
  }
}

void map_iterator(const map<int, pair<int, int> >& m){
  for( map<int, pair<int, int> >::const_iterator it = m.begin(); it != m.end(); it++ ){
    cout << it->first << ": " << it->second.first << ", " << it->second.second << endl;
  }
}