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Add Board.peg_count.

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This commit is contained in:
Josh Holtrop 2021-02-24 22:07:48 -05:00
parent 22a8a3b94a
commit d6a3de2fd0
1 changed files with 12 additions and 0 deletions
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12
src/pegp/board.d
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@ -3,6 +3,7 @@ module pegp.board;
class Board class Board
{ {
private int m_size; private int m_size;
private int m_peg_count;
private bool[] m_pegs; private bool[] m_pegs;
enum Direction enum Direction
@ -42,12 +43,19 @@ class Board
m_pegs = new bool[n_pegs]; m_pegs = new bool[n_pegs];
m_pegs[] = true; m_pegs[] = true;
m_pegs[0] = false; m_pegs[0] = false;
m_peg_count = n_pegs - 1;
} }
this(Board b) this(Board b)
{ {
m_size = b.m_size; m_size = b.m_size;
m_pegs = b.m_pegs.dup; m_pegs = b.m_pegs.dup;
m_peg_count = b.m_peg_count;
}
@property int peg_count()
{
return m_peg_count;
} }
private int peg_index(int row, int col) private int peg_index(int row, int col)
@ -78,11 +86,13 @@ class Board
void remove_peg(Position p) void remove_peg(Position p)
{ {
m_pegs[peg_index(p.row, p.col)] = false; m_pegs[peg_index(p.row, p.col)] = false;
m_peg_count--;
} }
void add_peg(Position p) void add_peg(Position p)
{ {
m_pegs[peg_index(p.row, p.col)] = true; m_pegs[peg_index(p.row, p.col)] = true;
m_peg_count++;
} }
Board move(Position p, Direction d) Board move(Position p, Direction d)
@ -103,6 +113,7 @@ class Board
unittest unittest
{ {
Board b = new Board(5); Board b = new Board(5);
assert(b.peg_count == 14);
assert(b.position_valid(Position(0, 0))); assert(b.position_valid(Position(0, 0)));
assert(b.position_valid(4, 0)); assert(b.position_valid(4, 0));
assert(b.position_valid(4, 4)); assert(b.position_valid(4, 4));
@ -155,5 +166,6 @@ class Board
assert(!b2.peg_present(2, 0)); assert(!b2.peg_present(2, 0));
assert(!b2.peg_present(1, 0)); assert(!b2.peg_present(1, 0));
assert(b2.peg_present(0, 0)); assert(b2.peg_present(0, 0));
assert(b2.peg_count == 13);
} }
} }