//order.cpp
//example of a template function and
//some classes with which it can be used.
#include <iostream> //cout, endl
#include <string>  //string
using namespace std;

//put a and b into increasing order
template <class T>
void order(T& a, T& b)
  {if (b < a)
    {T temp = a;
     a = b;
     b = temp;}
  }//end order

class Kid{
private:
  string name;
public:
  Kid(string  n)
    {name=n;}
  void tellName()
    {cout << '\n' << name;}
};//end Kid

class Box{
private:
  float length, width, depth;
public:
  Box(float ln, float wd, float dp)
    {length=ln; width=wd; depth=dp;}
  float getSize()
    {return length*width*depth;}
  int operator <(Box& b)
    {int i=(getSize()<b.getSize());
    return i;}

};//end Box


void main()
{
  int x=4;
  int y=2;
  cout << "INTS BEFORE ORDER:\n";
  cout << x << ' ' << y << endl;
  order(x,y);
  cout << "INTS AFTER ORDER:\n";
  cout << x << ' ' << y << endl;
  Kid m("Max");
  Kid n("Nellie");
  cout << "KID BEFORE ORDER:";
  n.tellName();
  m.tellName();
  //order(n,m);
    //ILLEGAL STRUCTURE OPERATION
    //Kid class does not have < defined.
  cout << "\nAFTER ORDER:- oops, not legal ";
  n.tellName();
  m.tellName();

  Box s(27,3,5);
  Box t(8,4,2);
  cout << "\nBoxes before order:\n";
  cout << s.getSize() << endl;
  cout << t.getSize() << endl;
  order(s,t);
  cout << "Boxes in order:\n";
  cout << s.getSize() << endl;
  cout << t.getSize() << endl;
}