View difference between Paste ID: TFYcKAL7 and hZm8c80A

 #include <iostream>
 #include <vector>
 #include <string>
 #include <cstdlib>
 
 using namespace std;
 
 class Entity
     {
         private:
 
             string name;
             int health;
             int maxHealth;
             int damage;
 
         public:
 
             Entity(string entityName)
             {
                 name = entityName;
                 maxHealth = 10;
                 health = maxHealth;
                 damage = 2;
             }
 
             string get_name()
             {
                 return name;
             }
 
             int get_health()
             {
                 return health;
             }
 
             int get_max_health()
             {
                 return maxHealth;
             }
 
             int get_damage()
             {
                 return damage;
             }
 
             void lower_health(int value)
             {
                 health -= value;
                 if (health < 0)
                 {
                     health = 0;
                 }
             }
             void add_health(int value)
             {
                 health += value;
                 if (health > maxHealth)
                 {
                     health = maxHealth;
                 }
             }
     };
 
 class Player : public Entity
 {
     private:
 
         int metal;
         int oxygen;
 
     public:
 
         Player(string playerName) : Entity(playerName)
         {
             metal = 0;
             oxygen = 100;
         }
 
         Player() : Entity("John")
         {
 
         }
 
         int get_metal()
         {
             return metal;
         }
 
         int get_oxygen()
         {
             return oxygen;
         }
 
         void display_player_info()
         {
             cout << "Stan gracza" << endl;
             cout << "------------------------------------------------" << endl;
             cout << "Życie: " << get_health() << "/" << get_max_health() << endl;
             cout << "Atak: " << get_damage() << endl;
             cout << "Tlen: " << oxygen << "%" << endl;
             cout << "Metal: " << metal << "/50" << endl;
         }
 
         void rest()
         {
             cout << get_name() << " odpoczywa. Zużycie 2% tlenu." << endl << endl;
             lower_oxygen(2);
             add_health(5);
             display_player_info();
         }
 
         void lower_oxygen(int value)
         {
             oxygen -= value;
         }
 
         void add_oxygen(int value)
         {
             if(oxygen + value > 100)
             {
                 oxygen = 100;
             }
             else
             {
                 oxygen += value;
             }
         }
 
         void add_metal(int value)
         {
             metal += value;
         }
 };
 
 class Game
 {
     private:
 
         Player player;
 
 
     public:
 
         Game(string playerName)
         {
             player = Player(playerName);
             cout << player.get_name() << endl;
         }
 
         void start_game()
         {
             cout << "------------------------------------------------" << endl;
             cout << "Rozbiłeś się na księżycu!" << endl;
             cout << "Twoim zadaniem jest przetrwanie i zdobycie wystarczająco dużo surowców by zbudować statek do domu." << endl;
             cout << "Uważaj na zapasy swojego tlenu, bez niego nie możesz kontynuować gry." << endl ;
             cout << "Powodzenia " << player.get_name() << "!" << endl << endl;
 
             player.display_player_info();
 
             bool gameRunning = true;
             int playerChoice;
 
             while(gameRunning)
             {
                 print_main_menu();
                 cout << "Wpisz numer: ";
                 cin >> playerChoice;
 
                 switch (playerChoice)
                 {
                     case 1:
                         player.display_player_info();
                         break;
                     case 2:
                         player.rest();
                         break;
                     case 3:
                         search_resources();
                         if(player.get_health() <= 0)
                         {
                             cout << "Gracz przegrywa!" << endl;
                             cout << "Koniec gry! Spróbuj ponownie!" << endl;
                             gameRunning = false;
                         }
                         break;
                     case 4:
                         if(player.get_metal() >= 50)
                         {
                             cout << "Gracz wygrywa!" << endl;
                             cout << "Pomyślnie zbudowałeś statek i wydostałeś się z księżyca!" << endl;
                             cout << "Dzięki za gre!" << endl;
                         }
                         else
                         {
                             cout << "Nie masz wystarczająco dużo metalu by zbudować statek." << endl;
                         }
                         break;
                     case 0:
                         cout << "Koniec gry!" << endl;
                         gameRunning = false;
                         break;
                 }
             }
         }
 
         void print_main_menu()
         {
             cout << endl << "Co chcesz zrobić?" << endl;
             cout << "------------------------------------------------" << endl;
             cout << "[1] Sprawdź swój stan." << endl;
             cout << "[2] Odpocznij." << endl;
             cout << "[3] Szukaj zasobów." << endl;
             if (player.get_metal() >= 50)
             {
                 cout << "[4] Zbuduj statek." << endl;
             }
             cout << "[0] Skończ grę." << endl;
         }
 }