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Why am I getting linker errors when I split my program into separate files?

epitaque (2)
The error I'm getting:
LNK2001: ' unresolved external symbol "public: __cdecl Object::Object(void)" (??0Object@@QEAA@XZ)

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//Object.h
#ifndef OBJECT_H
#define OBJECT_H

#include <SFML/Graphics.hpp>

using namespace sf;

class Object
{
public:
	RectangleShape rect;
	Object();
	Object(Vector2f position, Vector2f size, Color color);
	void Update();
	bool Collision(Object p);
	float bottom, top, left, right;
};

#endif

//Object.cpp
#include <SFML/Graphics.hpp>
#include "Object.h"

using namespace sf;

Object::Object(Vector2f position, Vector2f size, Color color) //Constructor converts paramaters to variables
{
	rect.setPosition(position);
	rect.setSize(size);
	rect.setFillColor(color);
}

void Object::Update()
{
	bottom = rect.getPosition().y + rect.getSize().y;
	top = rect.getPosition().y;
	right = rect.getPosition().x + rect.getSize().x;
	left = rect.getPosition().x;
}
bool Object::Collision(Object p)
{
	if (right < p.left || left > p.right || top > p.bottom || bottom < p.top)
	{
		return false;
	}
	return true;
}


//Block.h
#ifndef BLOCK_H
#define BLOCK_H

#include <SFML/Graphics.hpp>
#include "Object.h"

using namespace sf;

class Block : public Object
{
public:
	Block();
	Block(Vector2f position, Color color);
};

#endif

//Block.cpp
#include <SFML/Graphics.hpp>
#include "Block.h"
#include "Object.h"

using namespace sf;

Block::Block()
{
	rect.setPosition(0, 0);
	rect.setSize(Vector2f(64, 64));
	rect.setFillColor(Color::Red);
} 

Block::Block(Vector2f position, Color color) 
{
	rect.setPosition(position);
	rect.setSize(Vector2f(64, 64));
	rect.setFillColor(color);
}


I know I've properly statically linked SFML (The graphics library I'm using) because when I commented out every single file and ran some example SFML code it worked. Also, if it is important, I am compiling 64 bit code.
Last edited on
TarikNeaj (2580)
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public:
	RectangleShape rect;
	Object(); // try changing this to object(){}
	Object(Vector2f position, Vector2f size, Color color);
	void Update();
	bool Collision(Object p);
	float bottom, top, left, right;
};
epitaque (2)
I have absolutely no idea why that works but it does! Thank you so much :D
TarikNeaj (2580)
If you
google unresolved external symbol c++
you might find out :p
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