View difference between Paste ID: EJ0TZtzE and N335WsEg

 #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;
         }
 };