include <functional>
  include <algorithm>
  include <string>
  include <vector>
  include <iostream>
  using namespace std;
  
  void findEmptyString(const vector<string*>& strings)
  {
    vector<string*>::const_iterator it = find_if(strings.begin(), strings.end(),
                                                 mem_fun(&string::empty));
  
    if (it == strings.end()) {
      cout << "No empty strings!\n";
    } else {
      cout << "Empty string at position: " << it - strings.begin() << endl;
    }
  }
  
  int main(int argc, char **argv)
  {
    vector<string *> myVector;
  
    string one = "blah";
    string two = "";
    myVector.push_back(&one);
    myVector.push_back(&one);
    myVector.push_back(&two);
    myVector.push_back(&one);
  
    findEmptyString(myVector);
  
    return (0);
  }