How to properly inherit base class in c++ and override virtual function - c++

Question

I'm quite new to c++ and I started looking at the SDL2 library to make a simple platformer game. I'm running into a problem with class inheritance. I have a parent class (GameObj) and a child class (Player). When I try to inherit the the GameObj from Player the compiler tells me the base class is undefined. I am trying to override the update function in the Player class, however since I get a "Base class undefined" error it also tells me that the overrode function did not override anything.
GameObj.h
#pragma once
#include "Game.h"
class GameObj
{
public:
GameObj(const char* path);
~GameObj();
virtual void update() = 0;
void render();
protected:
SDL_Texture* tex{ nullptr };
SDL_Rect srcR;
SDL_Rect dstR;
};
GameObj.cpp
#include "GameObj.h"
GameObj::GameObj(const char* path)
{
tex = TextureManager::LoadImage(path);
srcR.x = srcR.y = 0;
srcR.w = srcR.h = 32 * 2;
dstR.x = dstR.y = 0;
dstR.w = dstR.h = srcR.w;
}
GameObj::~GameObj() {}
void GameObj::render() {
TextureManager::DrawTexture(tex, srcR, dstR);
}
Player.h
#pragma once
#include "Game.h"
#include "GameObj.h"
class Player : public GameObj
{
public:
Player(const char* path, int x, int y);
~Player();
void update() override;
private:
int x{ 0 };
int y{ 0 };
int speed{ 0 };
int velocity{ 0 };
};
Player.cpp
#include "Player.h"
Player::Player(const char* path, int x, int y) : GameObj(path){};
Player::~Player() {};
void Player::update ()
{
x++;
dstR.x = x;
dstR.y = y;
}

Answer 1

As Retired Ninja commented there is a circular include issue in the code. GameObj.h included Game.h and Game.h included Player.h. To fix this issue I removed the Game.h include in GameObj.h.
GameObj.h
#pragma once
#include <SDL.h>
class GameObj
{
public:
GameObj(const char* path);
virtual ~GameObj() = default;
virtual void update() = 0;
void render();
protected:
SDL_Texture* tex{ nullptr };
SDL_Rect srcR;
SDL_Rect dstR;
};
GameObj.cpp
#include "GameObj.h"
#include "TextureManager.h"
GameObj::GameObj(const char* path)
{
tex = TextureManager::LoadImage(path);
srcR.x = srcR.y = 0;
srcR.w = srcR.h = 32 * 2;
dstR.x = dstR.y = 0;
dstR.w = dstR.h = srcR.w;
}
GameObj::~GameObj() {}
void GameObj::render() {
TextureManager::DrawTexture(tex, srcR, dstR);
}