你已经学会了 if 语句、函式、还有阵列。现在你要练习扭转一下思维了。把下面的代码写下来，看你是否能弄懂它实现的是什么功能。
def prompt()
print "> "
end
def gold_room()
puts "This room is full of gold. How much do you take?"
prompt; next_move = gets.chomp
if next_move.include? "0" or next_move.include? "1"
how_much = next_move.to_i()
else
dead("Man, learn to type a number.")
end
if how_much < 50
puts "Nice, you're not greedy, you win!"
Process.exit(0)
else
dead("You greedy bastard!")
end
end
def bear_room()
puts "There is a bear here."
puts "The bear has a bunch of honey."
puts "The fat bear is in front of another door."
puts "How are you going to move the bear?"
bear_moved = false
while true
prompt; next_move = gets.chomp
if next_move == "take honey"
dead("The bear looks at you then slaps your face off.")
elsif next_move == "taunt bear" and not bear_moved
puts "The bear has moved from the door. You can go through it now."
bear_moved = true
elsif next_move == "taunt bear" and bear_moved
dead("The bear gets pissed off and chews your leg off.")
elsif next_move == "open door" and bear_moved
gold_room()
else
puts "I got no idea what that means."
end
end
end
def cthulu_room()
puts "Here you see the great evil Cthulu."
puts "He, it, whatever stares at you and you go insane."
puts "Do you flee for your life or eat your head?"
prompt; next_move = gets.chomp
if next_move.include? "flee"
start()
elsif next_move.include? "head"
dead("Well that was tasty!")
else
cthulu_room()
end
end
def dead(why)
puts "#{why} Good job!"
Process.exit(0)
end
def start()
puts "You are in a dark room."
puts "There is a door to your right and left."
puts "Which one do you take?"
prompt; next_move = gets.chomp
if next_move == "left"
bear_room()
elsif next_move == "right"
cthulu_room()
else
dead("You stumble around the room until you starve.")
end
end
start()你可以结果：
$ ruby ex35.rb
You are in a dark room.
There is a door to your right and left.
Which one do you take?
> left
There is a bear here.
The bear has a bunch of honey.
The fat bear is in front of another door.
How are you going to move the bear?
> taunt bear
The bear has moved from the door. You can go through it now.
> open door
This room is full of gold. How much do you take?
> asf
Man, learn to type a number. Good job!
$to_i() 这个函式可以给你一些头绪。