visual studio 2013 - c++ operator<< overloading -


I am starting in C ++ and I have the following problem when I run the following code in VS2013 Receives an error. 

  class Y {public: y (int un_x, int un_y): x_ (un_x), y_ (un_y) {} int x () const {return x_; } Int y () const {return y_; } Private: int x_; Int y_; }; Class X {Private: Y coordination; Public: // Some code ... Y position () const {return coordination; } Zero Exhibition (Ostream and Output) Const (output & lt; & Lt; "Object is in position" & lt; & Lt; Post(); }}; Ostream & amp; Operator & lt; & Lt; (Ostream & Output, Y X) {Output & lt; & Lt; "("   
 If I create some_object object of class X and try to:  
  cout < & Lt; Some_object;   
 I get the followng error:  
  error C2679: binary '& lt; & lt; & gt; : No operator found which does not take a right hand operation type 'const Y' (or an acceptable conversion)    
 
 
 what  & lt; & Lt;  operator defined  after that  do you try to use it? Is this after the  display ()  function? If so, you need to move it so that it is defined before experiment, or at the very least, declare it (which provides a prototype for it):  
  ostream & amp; Operator & lt; & Lt; (Ostream and Output, Y X);   
 As a sidenote, you should give example  y  with constant reference instead of value:  
  ostream & amp; Operator & lt; & Lt; (ostream & output, y const & x);

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