Hi all noob, I m Djon Karmak

#include <iostream>
#include <windows.h>
#include <time.h>

using namespace std;
void Start(){
srand (time(NULL));
setlocale(KEY_SET_VALUE, "Russian");
}
class Persona{

public:

Persona (string Name_tmp,int Level_tmp, int HP_tmp,int MP_tmp,int STR_tmp,int CON_tmp,int P_Atk_tmp,int P_Def_tmp){
    Name = Name_tmp;
    Level = Level_tmp;
    HP = HP_tmp;
    MP = MP_tmp;
    STR = STR_tmp;
    CON = CON_tmp;
    P_Atk = P_Atk_tmp;
    P_Def = P_Def_tmp;
}

int Func_HP (int Level){

    int HP_Return = HP;
    for (int i = 0; i < Level; i++){
        if (i < 10){
            HP_Return += rand() % 21 + 18;
        }
        else if (i > 9 && i < 20){
            HP_Return += 20 + (i - 10);
        }
        else if (i > 19 && i < 40){
            HP_Return += 53 + (i - 20);
        }
        if (i == 19){
        HP_Return += 52;
    }
    }
    return HP_Return;
}

int Func_MP (int Level){
    int MP_Return = MP;
    for (int i = 0; i < Level; i++){
        if (i < 10){
            MP_Return += 7;
        }
        else if (i > 9 && Level < 20){
            MP_Return += rand () % 9 + 8;
        }
        else if (i > 19 && Level < 40){
            MP_Return += rand () % 18 + 16;   ;
        }
    }
    return MP_Return;
}


    string Name;
    int HP;
    int MP;
    int STR;
    int CON;
    int P_Atk;
    int P_Def;
    int Level;
};

int main()
{
    Start();
    int Lvl = 0;
    cout << "Введите уровень персонажа: ";
    cin >> Lvl;
    Persona Human_Warrior ("MaKJlayD",Lvl, 126, 38, 40, 43, 30, 100);
    cout << endl << Human_Warrior.HP << endl;
    Human_Warrior.HP = Human_Warrior.Func_HP(Human_Warrior.Level);
    Human_Warrior.MP = Human_Warrior.Func_MP(Human_Warrior.Level);
    cout << endl << "HP Персонажа: " << Human_Warrior.HP << endl;
    cout << "MP Персонажа: " << Human_Warrior.MP << endl;
    cout << "Hello world!" << endl;
    return 0;
}