Thread: problem with classes and pointers

WARNING: Not very clean code xP

Well, I have this class called player.

Code:

class player : public character{

public:
	player();
	~player();

	float speed;

private:
	//hgeQuad

};

And then I have this class called character.

Code:

class character {

public:
	character();
	~character();

	float x, y;
	static const int gravityPull = 1;

	void gravity();
	bool gravEffected();

};

And in the main.cpp file I call player* P1, this crashes the game, and I've had laods of problems, when I call it as a pointer, but not when I call it like; player P1, why is this?
I still havn't figured out the differences between the two calls...
The thing I'm having problem with is the x and y from character, by the way.
Thanks in advance