C++ updating/changing variables from different class/variables - c++

Question

I'm a noobie at C++ and I was making a game for practice on Visual Studios and I just couldn't figure out how to update stats when exp was added. I tried changing the player level by adding exp but when I add 55 exp the player remained at level 1 still.
Main:
#include <iostream>
#include <windows.h>
#include "Game.h"
using namespace std;
void FalseLoad();
int main() {
//Cool load intro
FalseLoad();
cout << "\n \n";
Game::Game();
system("PAUSE");
return 0;
}
void FalseLoad() {
int i = 0;
int start;
cout << "***Freelancer*** \n \n";
system("PAUSE");
while (i <= 100){
cout << "Loading game... " << i << "% \n";
i++;
Sleep(110 - i);
if (i == 100) {
start = 0;
}
}
}
Game.cpp:
#include <iostream>
#include "Game.h"
using namespace std;
Game::Game() {
Player Player;
Player.Init();
cout << Player.exp << " " << Player.level;
Player.exp += 55;
cout << " " << Player.exp << " " << Player.level << " ";
}
Game.h:
#pragma once
#include "Player.h"
class Game {
public:
Game();
};
Player.cpp:
#include "Player.h"
Player::Player() {
}
void Player::Init() {
int exp = 5;
int level = (exp / 5);
int attack = (10 + (level * 2));
int defense = (10 + (level * 2));
int speed = (10 + (level * 2));
}
Player.h:
#pragma once
class Player
{
public:
Player();
void Init();
int exp = 5;
int level = (exp / 5);
int attack = (10 + (level * 2));
int defense = (10 + (level * 2));
int speed = (10 + (level * 2));
};

Answer 1

If you add 55 to exp, only exp will be changed.
You can write getters and setters and declare the member variables private:
Player.h
#pragma once
class Player
{
public:
Player();
void Init();
void addExp(const int additionalExp);
int getExp();
//... TODO add similar get/set methods for the other members...
private:
int exp = 5;
int level = (exp / 5);
int attack = (10 + (level * 2));
int defense = (10 + (level * 2));
int speed = (10 + (level * 2));
};
and add the method definitions:
#include "Player.h"
Player::Player() {
}
void Player::Init() {
int exp = 5;
int level = (exp / 5);
int attack = (10 + (level * 2));
int defense = (10 + (level * 2));
int speed = (10 + (level * 2));
}
void Player::addExp(const int additionalExp) {
if ( additionalExp < 0 ) return; // think about error handling or use
// unsigned for exp
exp += additionalExp;
level = exp / 50; // or something else, as you like.
}
int Player::getExp(){ return exp; }
// ... TODO add definitions for the other get/set methods...
And use the addExp() method in your main.cpp.
One benefit of having the member variables private is that you get more control in how they get manipulated. E.g. if you add exp, you can set level accordingly simultaneously.