# mooc课程mit 6.00.1x--problem set3解决方法

挺简单的一道题，计算函数和算法过程都已经给出，做一个迭代计算就行了。
 1 def radiationExposure(start, stop, step):
2     '''
3     Computes and returns the amount of radiation exposed
4     to between the start and stop times. Calls the
5     function f (defined for you in the grading script)
6     to obtain the value of the function at any point.
7
8     start: integer, the time at which exposure begins
9     stop: integer, the time at which exposure ends
10     step: float, the width of each rectangle. You can assume that
11       the step size will always partition the space evenly.
12
13     returns: float, the amount of radiation exposed to
14       between start and stop times.
15     '''
16     # FILL IN YOUR CODE HERE...
17     area = 0
18     while start <  stop:
19         area = area + f(start) * step
20         start += step
21
22     return area

• A WORDGAME: HANGMAN
一个猜单词游戏，个人感觉略有难度，游戏规则见这里。将其分步实现相应的函数。
  1 # 6.00 Problem Set 3
2 #
3 # Hangman game
4 #
5
6 # -----------------------------------
7 # Helper code
8 # You don't need to understand this helper code,
9 # but you will have to know how to use the functions
10 # (so be sure to read the docstrings!)
11
12 import random
13 import string
14
15 WORDLIST_FILENAME = "words.txt"
16
18     """
19     Returns a list of valid words. Words are strings of lowercase letters.
20
21     Depending on the size of the word list, this function may
22     take a while to finish.
23     """
25     # inFile: file
26     inFile = open(WORDLIST_FILENAME, 'r', 0)
27     # line: string
29     # wordlist: list of strings
30     wordlist = string.split(line)
31     print "  ", len(wordlist), "words loaded."
32     return wordlist
33
34 def chooseWord(wordlist):
35     """
36     wordlist (list): list of words (strings)
37     Returns a word from wordlist at random
38     """
39     return random.choice(wordlist)
40
41 # end of helper code
42 # -----------------------------------
43
44 # Load the list of words into the variable wordlist
45 # so that it can be accessed from anywhere in the program
47
48 def isWordGuessed(secretWord, lettersGuessed):
49     '''
50     secretWord: string, the word the user is guessing
51     lettersGuessed: list, what letters have been guessed so far
52     returns: boolean, True if all the letters of secretWord are in
53         lettersGuessed; False otherwise
54     '''
55     # FILL IN YOUR CODE HERE...
56     for c in secretWord:
57         if c not in lettersGuessed:
58             return False
59
60     return True
61
62 def getGuessedWord(secretWord, lettersGuessed):
63     '''
64     secretWord: string, the word the user is guessing
65     lettersGuessed: list, what letters have been guessed so far
66     returns: string, comprised of letters and underscores that represents
67       what letters in secretWord have been guessed so far.
68     '''
69     # FILL IN YOUR CODE HERE...
70     guess = ""
71     for c in secretWord:
72         if c in lettersGuessed:
73             guess += c
74         else:
75             guess += "_ "
76
77     return guess
78
79 def getAvailableLetters(lettersGuessed):
80     '''
81     lettersGuessed: list, what letters have been guessed so far
82     returns: string, comprised of letters that represents what letters have not
83       yet been guessed.
84     '''
85     # FILL IN YOUR CODE HERE...
86     available = ""
87     for c in string.ascii_lowercase:
88         if c not in lettersGuessed:
89             available += c
90
91     return available
92
93 def hangman(secretWord):
94     '''
95     secretWord: string, the secret word to guess.
96     Starts up an interactive game of Hangman.
97     * At the start of the game, let the user know how many
98       letters the secretWord contains.
99     * Ask the user to supply one guess (i.e. letter) per round.
100     * The user should receive feedback immediately after each guess
101       about whether their guess appears in the computers word.
102     * After each round, you should also display to the user the
103       partially guessed word so far, as well as letters that the
104       user has not yet guessed.
105     Follows the other limitations detailed in the problem write-up.
106     '''
107     # FILL IN YOUR CODE HERE...
108     print "Welcome to the game Hangman!"
109     print "I am thinking of a word that is", len(secretWord), "letters long."
110     print "-------------"
111     lettersGuessed = []
113     availableLetters = string.ascii_lowercase
114
115     while mistakesMade < 8 and not isWordGuessed(secretWord, lettersGuessed):
116         print "You have", 8 - mistakesMade, "guesses left."
117         print "Available letters:", availableLetters
118         guess = raw_input("Please guess a letter: ").lower()
119
120         if guess in lettersGuessed:
121             print("Oops! You've already guessed that letter: " +
122                 getGuessedWord(secretWord, lettersGuessed))
123         elif guess in secretWord:
124             lettersGuessed.append(guess)
125             print "Good guess:", getGuessedWord(secretWord, lettersGuessed)
126         else:
128             lettersGuessed.append(guess)
129             print("Oops! That letter is not in my word: " +
130                 getGuessedWord(secretWord, lettersGuessed))
131
132         availableLetters = getAvailableLetters(lettersGuessed)
133
134         print "------------"
135
136     if isWordGuessed(secretWord, lettersGuessed):
137         print "Congratulations, you won!"
138     else:
139         print("Sorry, you ran out of guesses. The word was " + secretWord +
140             ".")
141
142 # When you've completed your hangman function, uncomment these two lines
143 # and run this file to test! (hint: you might want to pick your own
144 # secretWord while you're testing)
145
146 secretWord = chooseWord(wordlist).lower()
147 hangman(secretWord)

posted @ 2015-07-29 23:08  honoka  阅读(670)  评论(0编辑  收藏