C++ Class Definition class using enum as field type

#include <iostream>
#include <cstdlib>          //for srand(), rand()
#include <ctime>            //for time for srand()
using namespace std;
enum Suit { clubs, diamonds, hearts, spades };
//from 2 to 10 are integers without names
const int jack = 11;
const int queen = 12;
const int king = 13;
const int ace = 14;
class card/*from   w w w.  j a v a  2s  .  c om*/
{
   private:
   int number;        //2 to 10, jack, queen, king, ace
   Suit suit;         //clubs, diamonds, hearts, spades
   public:
   card()                      //constructor
   { }
   void set(int n, Suit s)     //set card
   { suit = s; number = n; }
   void display();             //display card
};
void card::display()              //display the card
{
   if( number >= 2 && number <= 10 )
      cout << number;
   else
      switch(number)
      {
         case jack:  cout << "J"; break;
         case queen: cout << "Q"; break;
         case king:  cout << "K"; break;
         case ace:   cout << "A"; break;
      }
   switch(suit)
   {
         case clubs:    cout << static_cast<char>(5); break;
         case diamonds: cout << static_cast<char>(4); break;
         case hearts:   cout << static_cast<char>(3); break;
         case spades:   cout << static_cast<char>(6); break;
   }
}
int main()
{
      card deck[52];
      int j;
      cout << endl;
      for(j=0; j<52; j++)         //make an ordered deck
      {
         int num = (j % 13) + 2;  //cycles through 2 to 14, 4 times
         Suit su = Suit(j / 13);  //cycles through 0 to 3, 13 times
         deck[j].set(num, su);    //set card
      }
      cout << "\nOrdered deck:\n";
      for(j=0; j<52; j++)         //display ordered deck
      {
         deck[j].display();
         cout << "  ";
         if( !( (j+1) % 13) )     //newline every 13 cards
            cout << endl;
      }
      srand( time(NULL) );        //seed random numbers with time
      for(j=0; j<52; j++)         //for each card in the deck,
      {
            int k = rand() % 52;     //pick another card at random
            card temp = deck[j];     //and swap them
            deck[j] = deck[k];
            deck[k] = temp;
      }
      cout << "\nShuffled deck:\n";
      for(j=0; j<52; j++)         //display shuffled deck
      {
            deck[j].display();
            cout << ", ";
            if( !( (j+1) % 13) )     //newline every 13 cards
               cout << endl;
      }
      return 0;
}