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Langton's ant: Difference between revisions
→{{header|Ruby}}: Simple Version
(→{{header|BBC BASIC}}: Added bc) |
(→{{header|Ruby}}: Simple Version) |
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'''Simple Version:'''
<lang ruby>class Ant
MOVE = [[1,0], [0,1], [-1,0], [0,-1]] # [0]:east, [1]:south, [2]:west, [3]:north
def initialize(size_x, size_y, pos_x=size_x/2, pos_y=size_y/2)
@plane = Array.new(size_y) {Array.new(size_x, true)} # true -> white, false -> black
@sx, @sy = size_x, size_y
@px, @py = pos_x, pos_y # start position
@direction = 0 # south
@moves = 0
move while (0 <= @px and @px < @sx) and (0 <= @py and @py < @sy)
end
def move
@moves += 1
@direction = (@plane[@py][@px] ? @direction+1 : @direction-1) % 4
@plane[@py][@px] = !@plane[@py][@px]
@px += MOVE[@direction][0]
@py += MOVE[@direction][1]
end
def to_s
["out of bounds after #{@moves} moves: (#@px, #@py)"] +
(0...@sy).map {|y| (0...@sx).map {|x| @plane[y][x] ? "." : "#"}.join}
end
end
puts Ant.new(100, 100).to_s</lang>
;Output is the same above.
=={{header|Run BASIC}}==
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