Mini-project # 2

第三周的作业，大致就是两个给定的上下界，在其中随机一个数，让用的人输入猜的数字，告知他实际的数字比猜的大还是小，一共有[log(upper) / log(2)]次机会，策略是二分。

这次是带界面的，库是老师写的simplegui，在下面的链接里（科学上网）

现在完成了第一部分。输出还是在控制台而不是在画布。。

http://www.codeskulptor.org

思路大致是这样：

　　用全局变量存上下界，通过按钮的动作给出。每次一开始调用newgame做各种预处理，随机出给定的数，计算剩余剩余猜的次数等等。每次按按钮也要记得调用newgame

　　打分的时候发现有人一开始没调用。。貌似是不行的吧？

　　接下来输入的时候获取输入值判断什么的。。次数没了要重新开始。

　　用了try防止不合法输入。。自己玩起来还没有什么问题。除了不太方便。。。。。= =

体会是：

　　python的全局变量。。。是要在函数里声明的。。

　　开发貌似很练码力。。。。。。。。。。。。。。。。。。。。。。。。。。。。。

# template for "Guess the number" mini-project
# input will come from buttons and an input field
# all output for the game will be printed in the console

import simplegui
import random
import math
guess_num = 0
secret_number = 0

upper = 100
remain_chance = 7

# helper function to start and restart the game
def new_game():
    # initialize global variables used in your code here
    global secret_number, remain_chance
    # remove this when you add your code    
    secret_number = random.randrange(0, upper)
    remain_chance = int(math.ceil(math.log(upper)/math.log(2)))
    print "New game start:","Range is [0,", upper,")"
    print "Number of remaining guesses is", remain_chance

# define event handlers for control panel
def range100():
    # button that changes the range to [0,100) and starts a new game 
    global upper, remain_chance
    # remove this when you add your code 
    upper = 100
    remain_chance = 7
    new_game()

def range1000():
    # button that changes the range to [0,1000) and starts a new game     
    global upper
    remain_chance = 10
    upper = 1000
    new_game()
    
    
def input_guess(guess):
    # main game logic goes here    
    global guess_num, remain_chance
    # remove this when you add your code
    try:
        guess_num = int(guess)
    except:
        print "an integer please"
        return
    print "Guess was", guess
    remain_chance -= 1
    print "Number of remaining guesses is", remain_chance
    #judge
    if guess_num == secret_number:
        print "Correct"
        new_game()
        return
    elif guess_num > secret_number: print "Lower"
    elif guess_num < secret_number: print "Higher"
        
    #if run out of chance
    
    if remain_chance == 0:
        print "You ran out of chances"
        new_game()
       
    
# call new_game 
new_game()


# create frame
f = simplegui.create_frame("Guess", 200, 200)

                          
# register event handlers for control elements and start frame
input_guess = f.add_input("enter what you guess", input_guess, 100)
reset = f.add_button("reset", new_game)
Range_100 = f.add_button("Range is [0,100)", range100)
Range_1000 = f.add_button("Range is [0,1000)", range1000)
f.start()

# always remember to check your completed program against the grading rubric