shuffle deck by default

Signed-off-by: Aiden Woodruff <aiden@aidenw.net>

2 files changed, 10 insertions, 1 deletions

diff --git a/deck.cc b/deck.cc
index 7801e29..9e1204a 100644
--- a/deck.cc
+++ b/deck.cc
@@ -1,3 +1,6 @@
+#include <algorithm>
+#include <random>
+
 #include "deck.h"
 
 namespace wcards {
@@ -5,9 +8,14 @@ namespace wcards {
                 for (unsigned i = 0; i < 52; ++i) {
                         cards[i] = i + 1;
                 }
+                shuffle();
         }
         Card Deck::draw(void) {
                 if (pos == 52) return Card();
-                else return Card(pos++);
+                else return Card(cards[pos++]);
+        }
+        void Deck::shuffle(void) {
+                std::default_random_engine engine(std::random_device{}());
+                std::shuffle(cards, cards + 52, engine);
         }
 } // namespace wcards
diff --git a/deck.h b/deck.h
index 929e509..b8edf48 100644
--- a/deck.h
+++ b/deck.h
@@ -9,6 +9,7 @@ namespace wcards {
                 Deck();
                 Card draw(void);
         private:
+                void shuffle(void);
                 unsigned cards[52], pos;
         };
 } // namespace wcards