Lua 简单的IO交互 和迷宫代码

 1 function room1 ()

 2     print("in room1")

 3     local move = io.read()

 4     if move == "south" then

 5        return room3()

 6     elseif move == "east" then

 7        return room2()

 8     else

 9        print("invalid move")

10        return room1()   -- stay in the same room

11     end

12 end

13  

14 function room2 ()

15     print("in room2")

16     local move = io.read()

17     if move == "south" then

18        return room4()

19     elseif move == "west" then

20        return room1()

21     else

22        print("invalid move")

23        return room2()

24     end

25 end

26  

27 function room3 ()

28     print("in room3")

29     local move = io.read()

30     if move == "north" then

31        return room1()

32     elseif move == "east" then

33        return room4()

34     else

35        print("invalid move")

36        return room3()

37     end

38 end

39  

40 function room4 ()

41 

42     print("in room4")

43     print("congratilations!")

44 end

45 

46 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!