Lua 简单的IO交互 和迷宫代码

function room1 ()
    print("in room1")
    local move = io.read()
    if move == "south" then
       return room3()
    elseif move == "east" then
       return room2()
    else
       print("invalid move")
       return room1()   -- stay in the same room
    end
end
 
function room2 ()
    print("in room2")
    local move = io.read()
    if move == "south" then
       return room4()
    elseif move == "west" then
       return room1()
    else
       print("invalid move")
       return room2()
    end
end
 
function room3 ()
    print("in room3")
    local move = io.read()
    if move == "north" then
       return room1()
    elseif move == "east" then
       return room4()
    else
       print("invalid move")
       return room3()
    end
end
 
function room4 ()

    print("in room4")
    print("congratilations!")
end

room1()

Result：

in room1

south

in room3

north

in room1

west

invalid move

in room1

north

invalid move

in room1

south

in room3

south

invalid move

in room3

east

in room4

congratilations!