expected unqualified-id before ‘namespace’

Bonjour à tous, Je suis débutant en c++.
Mon progamme c++ se nomme point1.cpp.
Est ce que quelqu'un a compris ce type de message d'erreur à la compilation.

In file included from /usr/include/c++/4.3/iostream:44,
from point1.cpp:2:
/usr/include/c++/4.3/i486-linux-gnu/bits/c++config.h:233: erreur: expected unqualified-id before ‘namespace’

Code:

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------------------------------------------------ point1.h ---------------------------------------
class point
{
  float x, y;
  public :
    point(float, float);
    void deplace(float, float);
    void affiche();
}

Code:

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------------------------------------------------------ point1.cpp ----------------------------------------------------------
#include "point1.h"
#include <iostream>
 
point::point(float abs, float ord)
{
  x = abs;
  y = ord;
}
 
void point::deplace(float dx, float dy)
{
  x = x + dx;
  y = y + dy;
}
 
void point::affiche()
{
  std::cout << "Mes coordonnees cartesiennes sont :" <<"x = " << x << "\ty = " << y << "\n";
}
 
  main()
    {
      point p(1.25, 2.5);
      p.affiche();
      p.deplace(2.1, 3.4);
      p.affiche();
    }