STL vector превратить в stack

struct Card
{
 Card(string m, int r);
 bool operator < (const Card &Other)const;
 string mast;
 int rang;
};
    Card::Card(string m, int r)
    {
      mast=m;
      rang=r;
    }
 
bool Card::operator < (const Card &Other) const
{
    return (this->rang < Other.rang);
}
 
 
int _tmain(int argc, _TCHAR* argv[])
{
 
    vector<Card> cards;
 
for (int i=0; i<9; i++)
    cards.push_back(Card("spades",6+i));
for (int i=0; i<9; i++)
    cards.push_back(Card("clubs",6+i));
for (int i=0; i<9; i++)
    cards.push_back(Card("diamond",6+i));
for (int i=0; i<9; i++)
    cards.push_back(Card("hearts",6+i));
 
 
    sort(cards.begin(),cards.end());
    for(int i = 0;i<cards.size();++i)
        cout<<cards[i].mast.c_str()<<' '<<cards[i].rang<<endl;
 
    getchar();
    return 0;
}

cout<<st_cards.top();

class Class
{
public:
   Class():a(0)
   {
   }
   int GetA() const
   {
       return a;
   }
private:
   int a;
};
 
std::ostream& operator <<(std::ostream& os, const Class& one)
{
    os<<one.GetA()<<'\n';
    return os;
}