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[slidingtile] / sliding_tile_lib.h
1 #ifndef _SLIDING_TILE_LIB_H
2 #define _SLIDING_TILE_LIB_H
3
4 #include <istream>
5 #include <memory>
6 #include <ostream>
7 #include <vector>
8
9 const int BOARD_DIM = 4;
10 const int BOARD_SIZE = BOARD_DIM * BOARD_DIM;
11
12 struct InvertedBoard {
13 signed char pos[BOARD_SIZE];
14 };
15
16 struct Board {
17 signed char board[BOARD_SIZE];
18 bool is_valid() const;
19 signed char hole() const;
20 InvertedBoard invert() const;
21 int distance(const Board& o) const;
22 int distance(const InvertedBoard& invo) const;
23 };
24 std::istream& operator>>(std::istream& is, Board& board);
25 std::ostream& operator<<(std::ostream& os, const Board& board);
26
27 struct Step {
28 Board board;
29 std::shared_ptr<Step> prev;
30 std::vector<Step*> successors(std::shared_ptr<Step> shared_this);
31 static signed char adjacent[BOARD_SIZE][5];
32 };
33 std::ostream& operator<<(std::ostream& os, const Step& step);
34
35
36 #endif /* _SLIDING_TILE_LIB_H */