From 19bd29f9b2a3e4721943496debfc55e2a7d71da5 Mon Sep 17 00:00:00 2001
From: Scott Worley <scottworley@scottworley.com>
Date: Thu, 31 Dec 2015 00:14:02 -0800
Subject: [PATCH 1/1] Promote Board to a class so it can have methods.

---
 sliding_tile_lib.cc      | 2 +-
 sliding_tile_lib.h       | 4 +++-
 sliding_tile_lib_test.cc | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/sliding_tile_lib.cc b/sliding_tile_lib.cc
index a4d522e..24642f1 100644
--- a/sliding_tile_lib.cc
+++ b/sliding_tile_lib.cc
@@ -33,7 +33,7 @@ std::istream& operator>>(std::istream& is, Board& board) {
     }
     int numeric;
     is >> numeric;
-    board[i] = numeric;
+    board.board[i] = numeric;
   }
   return is;
 }
diff --git a/sliding_tile_lib.h b/sliding_tile_lib.h
index 8967324..1ffe6fa 100644
--- a/sliding_tile_lib.h
+++ b/sliding_tile_lib.h
@@ -6,7 +6,9 @@
 const int BOARD_DIM = 4;
 const int BOARD_SIZE = BOARD_DIM * BOARD_DIM;
 
-typedef signed char Board[BOARD_SIZE];
+struct Board {
+  signed char board[BOARD_SIZE];
+};
 std::istream& operator>>(std::istream& is, Board& board);
 
 extern signed char adjacent[BOARD_SIZE][5];
diff --git a/sliding_tile_lib_test.cc b/sliding_tile_lib_test.cc
index 0bbaec3..a0a6b52 100644
--- a/sliding_tile_lib_test.cc
+++ b/sliding_tile_lib_test.cc
@@ -39,7 +39,7 @@ TEST(Board, GoodInput) {
   is >> b;
   EXPECT_FALSE(is.fail());
   EXPECT_TRUE(is.eof());
-  EXPECT_THAT(b, testing::ElementsAreArray({15,14,9,13,3,1,12,8,0,11,6,4,7,5,2,10}));
+  EXPECT_THAT(b.board, testing::ElementsAreArray({15,14,9,13,3,1,12,8,0,11,6,4,7,5,2,10}));
 }
 
 TEST(Board, ShortInput) {
-- 
2.44.1