Calling derived class's functions in a function with parameter of base class

[flashmed]

Say I have 3 classes:

class Player 
{
    public:
        virtual func1();
};

class Human: public Player
{
    public:
        func1(); //implementing Player's func1()
        func2(); //Human's own function
};

class Computer : public Player
{
    public:
        func1(); //implementing Player's func1()
        func3(); //Computer's own function
};

Say in my main class, I have a function fight(Player p1, Player p2) and I would like to do something like this in the fight function, given that p1 is the human and p2 is the computer:

//function fight()
fight(Player p1, Player p2)
{
    p1.func2();
}
//using function fight()
fight(human, computer);

When I compile the program, I got this:
error: ‘class Player’ has no member named 'func2()'

What can I do to allow p1 to call func2 inside fight()? I'm not allowed to use pointers as the parameter for fight() and have to use the signature fight(Player p1, Player p2).

[abhishekm71]

As far as my knowledge goes you cannot call a derived class member function from the base class. You will have to modify the signature to fight(Human p1, Computer p2).

[vlad from moscow]

The compiler is right. Class Plyer has no a function with name func2.

[flashmed]

Is there a way I can force the code to use Human's func2 if in fight() I had a checking to make sure p1 is human? Like a C++ grammar, syntax thing?

[vlad from moscow]

If you pass derived objects then you can use dynamic_cast.

[flashmed]

Can you give me an example please (related to my question)? (on the dynamic_cast, I've read the tutorial on this website but it only applies to pointers). Thanks.

[vlad from moscow]

#include <iostream>

int main()
{
	class Player 
	{
	public:
		virtual void func1() const = 0;
	};

	class Human: public Player
	{
	public:
		void func1() const { std::cout << "I am a Human" << std::endl; }
		void func2() const { std::cout << "I will win the Game!" << std::endl; }
	};

	class Computer : public Player
	{
	public:
		void func1() const { std::cout << "I am a Computer" << std::endl; }
		void func2() const { std::cout << "No, it is me, computer, who will win the Game!" << std::endl; }
	};

	class Game
	{
	public:
		static void fight( const Player &p1, const Player &p2 )
		{
			p1.func1();
			p1.func1();

			dynamic_cast<const Human &>( p1 ).func2();
			dynamic_cast<const Computer &>( p2 ).func2();
		}
	};

	Human human;
	Computer computer;

	Game::fight( human, computer );

	return 0;
}