Bridge hands problem in C++

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1. #include <iostream>
2. #include <array>
3. #include <vector>
4. //#include <cstdio>
5. //#include <cmath>
6. #include <cstdlib>
7. #include <ctime>
8. //#include <iterator>
9.  
10.  
11. //os x: clang++ -std=c++11 -stdlib=libc++ -g -Wall bridgehands.cpp -o bridgehands
12. //linux: clang++ -std=c++11 -g -Wall bridgehands.cpp -o bridgehands.linux
13.  
14. std::array<int,52> shuffle_deck ()
15. {
16.   std::vector<int> unshuffled_deck (52,0);
17.   //initialize unshuffled deck
18.   for (int i = 0; i < 52; i++) unshuffled_deck[i] = i;
19.  
20.   srand (time (NULL));
21.   std::array<int,52> shuffled_deck;
22.   shuffled_deck.fill(-1);
23.  
24.   /* shuffle the deck by taking a random
25.      card from the unshuffled deck then
26.      deleting the card */
27.   for (int i = 0; i < 52; i++) {
28.     int random_card = rand() % (52 - i);
29.     shuffled_deck[i] = unshuffled_deck[random_card];
30.     unshuffled_deck.erase(unshuffled_deck.begin() + random_card);
31.    
32.  
33.   }
34.  
35.  
36.  
37.  
38.   return shuffled_deck;
39.  
40. }
41.  
42. template<typename C>
43. void print_sequence(C& items) {
44.   for (auto const& item : items) std::cout << item << ' ';
45. }
46.  
47. std::string convert_card (int card)
48. {
49.   std::array<std::string,13> card_strings =
50.   {{ "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"}};
51.   return card_strings[card % 13];
52.  
53. }
54.  
55. template<typename C>
56. void print_card_sequence(const C& cards) {
57.   for (auto const& card : cards) std::cout << convert_card(card) << ' ';
58. }
59.  
60. std::array<std::array<int, 13>, 4> deal_cards (std::array<int,52> shuffled_cards)
61. {
62.   std::array<std::array<int,13>, 4> dealt_cards;
63.   for (int i = 0; i < 52; i++)
64.     {
65.       dealt_cards[i%4][i%13] = shuffled_cards[i];
66.     }
67.   return dealt_cards;
68. }
69.  
70.  
71. struct Hand
72. {
73.  
74.   //store cards as an array of four vectors
75.   std::array<std::vector<int>,4> cards;
76.  
77.   void add_cards(std::array<int,13> new_cards)
78.   {
79.     std::sort(new_cards.begin(), new_cards.end());
80.     std::reverse(new_cards.begin(),new_cards.end());
81.    
82.     for (auto card : new_cards) {
83.       cards[(card / 13)].push_back(card);
84.     }
85.   }
86.  
87.   std::array<std::string,4> suit_labels {{"C", "D", "H", "S"}};
88.  
89.   void print_hand(void)
90.   {
91.     for (int i = 3; i > -1; i--)
92.       {
93.     std::cout << suit_labels[i] << ": ";
94.     print_card_sequence(cards[i]);
95.     std::cout << "\n";
96.       }
97.   }
98.  
99. };
100.  
101.  
102. void print_all_hands (std::array<std::array<int,13>, 4> dealt_cards)
103. {
104.   std::array<std::string,4> hand_labels = {{"NORTH", "EAST", "SOUTH", "WEST"}};
105.   for (int i = 0; i < 4; i ++)
106.     {
107.       std::cout << hand_labels[i] << "\n";
108.       Hand this_hand;
109.       this_hand.add_cards(dealt_cards[i]);
110.       this_hand.print_hand();
111.       std::cout << "\n";
112.     }
113. }
114.  
115.  
116.  
117. int main(int argc, char* argv[])
118. {
119.   std::array<int,52> shuffled_deck = shuffle_deck();
120.   std::array<std::array<int,13>, 4> dealt_cards = deal_cards(shuffled_deck);
121.   //print_sequence(dealt_cards[0]);
122.   //Hand north;
123.   //north.add_cards(dealt_cards[0]);
124.   //north.print_hand();
125.  
126.   print_all_hands(dealt_cards);
127.  
128.   return 0;
129. }