Sharing SFML variable between 2 classes

[danik550]

Hey so basically I am developing a game and I came across a problem of not knowing how to use a variable in a class that has been made in a different class.

Basically

My player.h class looks like this

class Player
{
public:
       sf::Vector2f velocity;

and in the player.cpp I do things to this velocity.

However I want to use this variable for checking purposes in my collider.cpp class. How can I access this velocity variable in a different class?

I tried Player A;
A.velocity;

and so on but I ended up with some external library error.

I can screenshot code if it will help

[Elias Daler]

Please post the error you're getting.
Did you include "player.h" in collider.cpp?

[danik550]

Please post the error you're getting.
Did you include "player.h" in collider.cpp?

Here is the error that pops up at runtime not as I put it in.
The error appears where ever I try putting it in.

Is this the right way of accessing other variables or am I doing something wrong?

[Elias Daler]

You didn't define constructor for Player class, that's why linking fails.

[danik550]

You didn't define constructor for Player class, that's why linking fails.

Thanks!!!
I had a constructor but not the default one with no arguments

Is it okay that have both?

like this

Player(with arguments);
Player();

[Stauricus]

Yes, C++ will call the right one when you create the object

if you create a player object ike this

Player player(arguments)

it will call your fisrt constructor; and if you use

Player player;

it will call the second one.