Created
January 14, 2025 14:46
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15 puzzle
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# fifteen_puzzle.rb | |
require 'io/console' | |
class FifteenPuzzle | |
def initialize | |
start_new_game | |
end | |
def play | |
loop do | |
until solved? | |
display_board | |
process_input | |
end | |
display_board | |
puts "Congratulations! You solved the puzzle in #{@moves} moves!" | |
puts "Press 'R' to restart or 'Q' to quit" | |
case $stdin.getch.downcase | |
when 'r' then start_new_game | |
when 'q' then exit | |
end | |
end | |
end | |
private | |
def start_new_game | |
@tiles = generate_solved_board | |
@empty_position = [3, 3] | |
shuffle_board | |
@moves = 0 | |
end | |
def generate_solved_board | |
tiles = [] | |
(0..3).each do |i| | |
row = [] | |
(0..3).each do |j| | |
value = i * 4 + j + 1 | |
row << (value < 16 ? value : nil) | |
end | |
tiles << row | |
end | |
tiles | |
end | |
def shuffle_board | |
directions = [:up, :down, :left, :right] | |
256.times do | |
valid_moves = directions.select do |dir| | |
new_pos = calculate_new_position(dir) | |
valid_move?(new_pos) | |
end | |
direction = valid_moves.sample | |
new_position = calculate_new_position(direction) | |
swap_tiles(@empty_position, new_position) | |
@empty_position = new_position | |
end | |
end | |
def process_input | |
case $stdin.getch.downcase | |
when 'w' then try_move(:down) | |
when 's' then try_move(:up) | |
when 'a' then try_move(:right) | |
when 'd' then try_move(:left) | |
when 'r' then start_new_game | |
when 'q' then exit | |
end | |
end | |
def try_move(direction) | |
new_position = calculate_new_position(direction) | |
if valid_move?(new_position) | |
swap_tiles(@empty_position, new_position) | |
@empty_position = new_position | |
@moves += 1 | |
else | |
puts "Invalid move!" | |
sleep(0.2) | |
end | |
end | |
def calculate_new_position(direction) | |
row, col = @empty_position | |
case direction | |
when :up then [row + 1, col] | |
when :down then [row - 1, col] | |
when :left then [row, col + 1] | |
when :right then [row, col - 1] | |
end | |
end | |
def valid_move?(position) | |
row, col = position | |
row.between?(0, 3) && col.between?(0, 3) | |
end | |
def swap_tiles(pos1, pos2) | |
r1, c1 = pos1 | |
r2, c2 = pos2 | |
@tiles[r1][c1], @tiles[r2][c2] = @tiles[r2][c2], @tiles[r1][c1] | |
end | |
def solved? | |
target = (1..15).to_a + [nil] | |
@tiles.flatten == target | |
end | |
def display_board | |
system('clear') || system('cls') | |
puts "\n15 PUZZLE\n" | |
puts | |
@tiles.each do |row| | |
puts row.map { |tile| tile.nil? ? ' ' : tile.to_s.rjust(2) }.join(' ') | |
end | |
puts "\nMoves: #{@moves}" | |
puts "Controls: WASD to move tiles, R to restart, Q to quit" | |
end | |
end | |
# Start the game | |
FifteenPuzzle.new.play |
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