C++ 哪个<&书信电报；我的重载运算符是否在此语句中？

如果您注意到实现

的标准方法，我有一个重载，因为每个

ostream& operator << (ostream& os, const reckful& p)
{
    os << p.PrintStuff();

    return os;
}

cout << "reckful object = " << reckobject << "!" << endl;

 cout << "reckful object = " << reckobject << "!" << endl;

cout << "reckful object = " 

   cout  << reckobject;

void operator << (ostream& os, const reckful& p)
{  
    os << 1;
}

std::cout << p;

std::cout << p << std::endl;

struct Point
{
    Point& setX( int x) { X = x; return *this;}
    Point& setY( int y) { Y = y; return *this;}

    int X;
    int Y;
};

    Point p;
    p.setX( 2 ).setY( 4 );

a << b << c

(a << b) << c

operator<<(operator<<(a, b), c);

operator<<(operator<<(operator<<(operator<<(cout, "reckful object = "), reckobject), "!"), endl);

operator<<(a, b).operator<<(c);

operator<<(a.operator<<(b), c);