overloading friend operator<< for template class

Question

I have read couple of the questions regarding my problem on StackOverflow.com now, and none of it seems to solve my problem. Or I maybe have done it wrong... The overloaded

Answer 1

This worked for me without any compiler warnings.

#include 
using namespace std;

template 
T my_max(T a, T b)
{
  if(a > b)
    return a;
  else
    return b;
}

template 
class D
{
public:
  D(classT in)
    : d(in) {};

  bool operator>(const D& rhs) const {
    return (d > rhs.d);
  }

  classT operator=(const D& rhs);

  friend ostream& operator<< (ostream & os, const D& rhs) {
    os << rhs.d;
    return os;
  }

private:
  classT d;
};


int main()
{

  int i1 = 1;
  int i2 = 2;
  D d1(i1);
  D d2(i2);

  cout << my_max(d1,d2) << endl;
  return 0;
}