virtual functions in polymorphism

hey eveyrone, im doing this program on polymorphism, and what i was using to print out all the of the information was a print function and it looked like this

virtual void print() const;

and that worked, but now i found out my teacher wants us to use the overloaded ostream operator to print out everything but when i tried this

virtual friend ostream&operator(ostream&,Time&);

it gave me an error.
please help, thanx a lot :-)

friends cant be virtual
you need something like this...

Code:

---

class Base
{
public:
  virtual ostream& print( ostream& )const = 0;
};

ostream& operator << ( ostream& os, const Base& object)
{  return object.print(os);}


class Derived: public Base
{
public:
  virtual ostream& print( ostream& strm )const
    { // print derived object
      return strm;
    }
};

---

std omitted for brevity.

i used the code that you have provided, and it compiles and runs, but instead of getting the private data members, i get the address of where everything was stored.

lets say i have

private:
char*stylename;
double price;
};
#endif

well how do i implement that into that virtual ostream function because all im returning is e.print(output);

thanx a lot :-)

post your code. use code tags. read stickys at top of forum if unsure.