#include <iostream>
#include <vector>
using namespace std;

enum SUIT { HEART, CLUB, DIAMOND, SPADE };
string suit_string[] = {"HEART", "CLUB", "DIAMOND", "SPADE"};

enum VALUE { ACE, TWO, THREE, FOUR, FIVE, SIX,
    SEVEN, EIGHT, NINE, TEN, JACK, QUEEN, KING};
string value_string[] = {"ACE", "TWO", "THREE", "FOUR", "FIVE",
    "SIX", "SEVEN", "EIGHT","NINE", "TEN", "JACK", "QUEEN", "KING"};

class Card {
 public:
    Card(SUIT s, VALUE v);
    SUIT suit;
    VALUE value;
    string toString();
};

Card::Card(SUIT s, VALUE v){
    suit=s;
    value=v;
}

string Card::toString(){
    return value_string[(int)this->value]+" of "+suit_string[(int)this->suit];
}



int main() {
        vector<Card*> deck;
        for (int i=0; i<4; i++) {
            for (int j=0; j<13; j++) {
                deck.push_back(new Card((SUIT)i,(VALUE)j));
            }
        }

        int removed_count, runs = 0;

        do{
            random_shuffle(deck.begin(),deck.end());
            removed_count=0;

            cout<<"--- Run number: "<<++runs<<"n";
            cout<<"--- still "<<deck.size()<<" cards in the deckn";

            for (int i=0; i<4; i++) {
                for (int j=0; j<13; j++) {
                    //cout<<i*13+j<<"n";

                    int position=i*13+j; //from 0 to 51

                    cout<<"'"+value_string[j]+"'"<<" <-> ";

                    Card card=*(deck.at(position));
                    cout<<card.toString()<<" ";

                        if(card.value == j){
                            removed_count++;
                            deck.erase(deck.begin()+position); //problems here!
                            cout<<"removedn";
                        }else{
                            cout<<"not removedn";
                        }

                    }
            }
            if(deck.empty()) break;
        }while(removed_count>0);

        if(deck.empty()){
            cout<<"You win!n";
        }else{
            cout<<"You lose!n";
        }

        return 0;
}

'KING' <-> terminate called after throwing an instance of 'std::out_of_range'
  what():  vector::_M_range_check

deck.erase(deck.begin()+position);

int position=i*13+j; //from 0 to 51

Card card=*(deck.at(position));