lua模拟推箱子游戏

function room1()
	local move = io.read()
	if move == "south" then
		print("enter room3")
		return room3()
	elseif move == "east" then
		print("enter room2")
		return room2()
	else 
		print("invalid move")
		return room1()
	end
end

function room2()
	local move = io.read()
	if move == "south" then
		print("enter room4")
		return room4()
	elseif move == "west" then
		print("enter room1")
		return room1()
	else
		print("invalid move")
		return room2()
	end
end

function room3()
	local move = io.read()
	if move == "north" then
		print("enter room1")
		return room1()
	elseif move == "east" then
		print("enter room4")
		return room4()
	else
		print("invalid move")
		return room3()
	end
end

function room4()
	print("congratilations")
end

room1()