C++ Operator overloading example

Question

Well, I\'m new to operator overloading, and I found this problem. Instead of documenting myself, I prefer to ask you :D

The point is, I know how to do simple operator ov

Answer 1

template 
dxfdata & operator <<( dxfdata & d, const T & t ) {
   std::ostringstream os;
   os << t;
   d.b += os.str();
   return d;
}