习题35，分支和函数，笨方法学python

#coding=utf-8
from sys import exit

def gold_room():
    print "This room is full of gold. How much do you take?"

    next = raw_input(">")
    if "0" in next or "1" in next:
        how_much = int(next)
    else:
        dead("Man, learn to type a number.")

    if how_much < 50:
        print "Nice, you are not greedy, you win!"
        exit(0)
    else:
        dead("You greedy bastard!")

def bear_room():
    print "There's bear here."
    print "The bear has a bunch of honey."
    print "The fat bear is in front of another door."
    print "How are you going to move the bear?"
    bear_moved = False

    while True:
        next = raw_input(">")

        if next == "take honey":
            dead("The bear looks at you then slaps your face off.")
        elif next == "taunt bear" and not bear_moved:
            print "The bear has moved from the door. You can go through it now."
            bear_moved = True
        elif next == "taunt bear" and bear_moved:
            dead("The bear gets pissed off and  chews your leg off.")
        elif next == "open door" and bear_moved:
            gold_room()
        else:
            print "i GOT NO IDEA WHAT THAT MEANS."

def cthulhu_room():
    print "Here you see the great evil Cthulhu."
    print "He, it, whatever stares at you and you go insane."
    print "Do you flee for your life or eat your head?"

    next = raw_input(">")

    if "flee" in next:
        start()
    elif "head" in next:
        dead("well that was tasty!")
    else:
        cthulhu_room()

def dead(why):
    print why, "Good job"
    exit(0)

def start():
    print "You are in a dark room."
    print "There is a door to your right and left."
    print "Which one you take?"

    next = raw_input(">")

    if next == "left":
        bear_room()
    elif next == "right":
        cthulhu_room()
    else:
        dead("You stumble around the room until you starve.")


start()

#程序可以运行，但是测试输入数据时，没反应，说明代码格式又错误，检查。

Note:
1) exit(0) 表示程序正常推出。
2) exit(1)表示程序出现错误。
3) exit(100)来表示 和exit(2), exit(3)不同的错误。