C++ game console#1

#include <iostream>
#include <time.h> // srand() rand()
#include <windows.h> // Sleep()
using namespace std;
class Money;
int wypelnij(int[],const int);
int JustSame(int[],const int);
void ifSame(int[],const int,Money&);
void shop(Money&);
void Game(Money&);
void Stats(Money&);
void levelup(Money&);
void failed(Money&);
class Money{
public:
    int gold;
    int level;
    int expMin;
    int expMax;
    Money(int g,int l,int eMin,int eMax){
        gold=g;
        level=l;
        expMin=eMin;
        expMax=eMax;
    }
};
int main()
{
    Money kasa(100,1,0,10);
    srand(time(NULL));
    Game(kasa);
    return 0;
}
void Game(Money& x){
    levelup(x);
    system("cls");
    int n = 10;
    int tab[n];
    int c=0;
    Stats(x);
    cout<<"\nprint 1 to start game\n";
    cout<<"\nprint 2 go to shop\n";
    cout<<"Enter: ";
    cin >>c;
    switch(c){
    case 1:
        {
            wypelnij(tab,n);
            cout<<"\nwait...\n";
            Sleep(5000);
            system("cls");
            ifSame(tab,n,x);
            break;
        }
    case 2:
        {
            cout<<"\nwait...\n";
            Sleep(5000);
            system("cls");
            shop(x);
            break;
        }
    default:
        {
            cout << "unknown error";exit(0);
        }
    }
}
void levelup(Money& x){
    if(x.expMin >= x.expMax){
        if(x.expMin > x.expMax){
        int bs=0;
        bs=x.expMin-x.expMax;
        x.expMin=0;
        x.expMax*=2;
        x.expMin+=bs;
        }else {x.expMin=0;x.expMax*=2;};
        x.level+=1;
        cout <<"Congratulations! You have reached a higher level!\n";
        Sleep(5000);
        return Game(x);
    }
}
void Stats(Money& x){
    cout << "Money: "<<x.gold<<endl;
    cout<< "---------\n";
    cout<<"Exp:"<<x.expMin<<"/"<<x.expMax<<endl;
    cout<<"Level: "<<x.level<<endl;
}
void shop(Money& x){
    levelup(x);
    int printme=0;
    cout << "|print 1| (100 gold : 1 exp)\n";
    cout << "|print 2| (500 gold : 5 exp)\n";
    cout << "|print 3| (1500 gold : 15 exp)\n";
    cout << "|print 4| (5000 gold : 50 exp)\n";
    cout << "|print 5| (10000 gold : 100 exp)\n";
    cout<< "Enter: ";
    cin >> printme;
    if(printme == 1 && x.gold >= 100){
            cout << "successful transaction!\n";
            x.expMin+=1;
            x.gold-=100;
            Sleep(3000);
            return Game(x);
    }else if(printme == 1 && x.gold < 100){
        failed(x);
    }
    if(printme == 2 && x.gold >= 500){
            cout << "successful transaction!\n";
            x.expMin+=5;
            x.gold-=500;
            Sleep(3000);
            return Game(x);
    }else if(printme == 2 && x.gold < 500){
        failed(x);
    }
    if(printme == 3 && x.gold >= 1500){
            cout << "successful transaction!\n";
            x.expMin+=15;
            x.gold-=1500;
            Sleep(3000);
            return Game(x);
    }else if(printme == 3 && x.gold < 1500){
        failed(x);
    }
    if(printme == 4 && x.gold >= 5000){
            cout << "successful transaction!\n";
            x.expMin+=50;
            x.gold-=5000;
            Sleep(3000);
            return Game(x);
    }else if(printme == 4 && x.gold < 5000){
        failed(x);
    }
    if(printme == 5 && x.gold >= 10000){
            cout << "successful transaction!\n";
            x.expMin+=100;
            x.gold-=10000;
            Sleep(3000);
            return Game(x);
    }else if(printme == 5 && x.gold < 10000){
        failed(x);
    }else {cout << "unknown error\n";exit(0);}
}
void failed(Money& x){
        cout << "sorry but you don't have enough money!\n";
        Sleep(3000);
        return Game(x);
}
int wypelnij(int tab[],const int n)
{
    int losowa=0;
    for(int i=0; i<n; i++)
    {
        losowa = rand()%100+1;
        tab[i]=losowa;
    }
    return* tab;
}
int JustSame(int tab[],const int n)
{
    int a=1;
    int numbs=0;
    for(int i=0; i<n; i++)
    {
        for(int j=a; j<n; j++)
        {
            if(tab[i]==tab[j])
            {
                numbs++;
            }
        }
        a++;
    }
    return numbs;
}
void ifSame(int tab[],const int n,Money& x)
{
    cout<< "Waiting";
    for(int i=0; i<3; i++)
    {
        cout<<".";
        Sleep(1000);
    }
    if(JustSame(tab,n) == 1)
    {
        x.expMin+=1;
        system("cls");
        cout << "Jackpot!\n";
        cout << "Here your gold: "<<50<<endl;
        x.gold+=50;
        Sleep(3000);
        system("cls");
        return Game(x);
    }else if(JustSame(tab,n) == 2){
        x.expMin+=2;
        system("cls");
        cout << "Jackpot! x2\n";
        cout << "Here your gold: "<<100<<endl;
        x.gold+=100;
        Sleep(3000);
        system("cls");
        return Game(x);
    }else if(JustSame(tab,n) == 3){
        x.expMin+=3;
        system("cls");
        cout << "Jackpot! x3\n";
        cout << "Here your gold: "<<150<<endl;
        x.gold+=150;
        Sleep(3000);
        system("cls");
        return Game(x);
    }else if(JustSame(tab,n) == 4){
        x.expMin+=4;
        system("cls");
        cout << "Jackpot! x4\n";
        cout << "Here your gold: "<<300<<endl;
        x.gold+=300;
        Sleep(4000);
        system("cls");
        return Game(x);
    }else if(JustSame(tab,n) == 5){
        x.expMin+=10;
        system("cls");
        cout << "JACKPOT X5 !!!\n";
        cout << "Here your gold: "<<600<<endl;
        x.gold+=600;
        Sleep(6000);
        system("cls");
        return Game(x);
    }
    else
    {
        cout << "try again...\n";
        Sleep(2500);
        system("cls");
        return Game(x);
    }

}