gwj / po_oopc · Files

#include <iostream>

namespace ours
{
  class example 
  {
    int a = 0;
    friend std::ostream& operator<< (std::ostream& o, example a);
  };

  std::ostream& operator<< (std::ostream& o, example a)
  {
      o << a.a;
      return o;
  }
}

int main()
{
  std::cout << 10;

  std::cout.operator<<(10);

  ours::example e,f,g;

  std::cout << e << f << g;

  ((std::cout << e) << f) << g;

  ours::operator<<(ours::operator<<(ours::operator<<(std::cout,e),f),g);

}