include <algorithm>
  include <functional>
  include <vector>
  include <iostream>
  using namespace std;
  
  // Function template to populate a container of ints.
  // The container must support push_back().
  template<typename Container>
  void populateContainer(Container& cont)
  {
    int num;
  
    while (true) {
      cout << "Enter a number (0 to quit): ";
      cin >> num;
      if (num == 0) {
        break;
      }
      cont.push_back(num);
    }
  }
  
  class MinAndMax : public unary_function<int, void>
  {
  public:
    MinAndMax();
    void operator()(int elem);
  
    // make min and max public for easy access
    int min, max;
  
  protected:
    bool first;
  };
  
  MinAndMax::MinAndMax() : min(-1), max(-1), first(true)
  {
  }
  
  void MinAndMax::operator()(int elem)
  {
    if (first) {
      min = max = elem;
    } else if (elem < min) {
      min = elem;
    } else if (elem > max) {
      max = elem;
    }
    first = false;
  }
  
  int main(int argc, char** argv)
  {
    vector<int> myVector;
    populateContainer(myVector);
  
    MinAndMax func;
    func = for_each(myVector.begin(), myVector.end(), func);
    cout << "The max is " << func.max << endl;
    cout << "The min is " << func.min << endl;
  
    return (0);
  }