以一个Python课程和学习分搜索，困惑，为什么我的语义是不正确

问题描述 投票：1回答：8

我们的任务是编写将一个秘密号码猜测从0到100的代码这是我的代码：

low = 0
mid = 50
high = 100
secretnum = "Is your secret number " + str(mid) + "?"
print"Please think of a number between 0 and 100!"
print secretnum
herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
while herp != 'c':
    if herp == 'h':
        high = mid
        mid = int((mid + low)/2)
    elif herp == 'l':
        low = mid
        mid = int((mid + high)/2)
    else:
        print"Sorry, I did not understand your input."
    print secretnum
    herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
if herp == 'c':
    print "Game over. Your secret number was: " + str(mid)

这是输出：

Is your secret number 50?
Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. h
Is your secret number 50?
Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. l
Is your secret number 50?
Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. c
Game over. Your secret number was: 37
python
8个回答
1
投票

作为Raufio指出，Python中的字符串是不可改变的。为了解决该问题，正在一遍又一遍地重复50，您需要在打印出来的问题再次调用STR（MID）。例如：

low = 0
mid = 50
high = 100
secretnum = "Is your secret number: " 
print"Please think of a number between 0 and 100!"
print secretnum + str(mid) + "?"
herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
while herp != 'c':
    if herp == 'h':
        high = mid
        mid = int((mid + low)/2)
    elif herp == 'l':
        low = mid
        mid = int((mid + high)/2)
    else:
        print"Sorry, I did not understand your input."
    print secretnum + str(mid) + "?"
    herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
if herp == 'c':
    print "Game over. Your secret number was:", mid
2
投票

该错误将其更改为：

print "Game over. Your secret number was:",mid

对于遍地的输出50，在一段时间print secretnum改变：

print "Is your secret number " + str(mid) + "?"

当你在一开始设定secretnum="Is your secret number " + str(mid) + "?"，它会创建一个字符串，字符串从中期完全分开。所以，如果你改变中期，变化不会被字符串中看到。

Python中的字符串是不可改变的意义，一旦它们是由他们完成。你不能改变一个字符串的内容，而没有完全改造它。什么str(mid)确实是创造mid的字符串表示。在这种情况下，创建的字符串"50"并投入字符串，永远不会被修改。所以，当你显示一个字符串，你需要确保它被再次调用str(mid)显示最新的值。

1
投票

在最后一行，你简单地说：

print "Game over. Your secret number was: " + str(mid)

这是因为蟒蛇要确保你真的知道自己在做什么 - 那就是增加了两个字符串连接在一起，而不是一个int和一个字符串 - 这是被禁止的。该STR（）函数简单地改变任何东西，你给它一个字符串。至于你的问题的语义，我觉得这个版本的代码已经得到了预期的行为：

low = 0  
mid = 50  
high = 100  
print "Please think of a number between 0 and 100!"  
herp = 50  
while herp != 'c':  
    print "Is your secret number " + str(mid) + "?"
    herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is to low. Enter 'c' to indicate the guess is correct")   
    if herp == 'h':  
        high = mid  
        mid = int((mid + low)/2)  
    elif herp == 'l':  
        low = mid  
        mid = int((mid + high)/2)  
    else:  
        print"Sorry, I did not understand your input."  
if herp == 'c':  
    print "Game over. Your secret number was: " + str(mid)
0
投票

更改行20

print "Game over. Your secret number was: " + mid

至

print "Game over. Your secret number was: ", mid

要么

print "Game over. Your secret number was: " + str(mid)

0
投票

在最后一行，键入print "Game over. Your secret number was: " + mid。然而，mid是一个数字，并将其添加到字符串没有任何意义。您需要先将其转换为字符串。

有几种方法可以做到这一点。你可以将其更改为：

  • print "Game over. Your secret number was: " + str(mid) ...把mid成字符串
  • print "Game over. Your secret number was: ", mid ......这样Python将把字符串作为mid两个变量，并自动将它们之间添加空格

.

low = 0
mid = 50
high = 100
secretnum = "Is your secret number " + str(mid) + "?"
print"Please think of a number between 0 and 100!"
print secretnum
herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
while herp != 'c':
    if herp == 'h':
        high = mid
        mid = int((mid + low)/2)
    elif herp == 'l':
        low = mid
        mid = int((mid + high)/2)
    else:
        print"Sorry, I did not understand your input."
    print secretnum
    herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
if herp == 'c':
    print "Game over. Your secret number was: " + str(mid)
0
投票

当我建立我的代码，我在第一次有同样的问题。寻找你的代码后，我已经注意到了一些错误，我会在这里强调它们：

  1. 你没有使用到的raw_input询问用户的数量
  2. 你不应该使用“C”参数为你而
  3. 你同时应该来的问题的raw_input后 NUM的raw_input =（ “请想0和100之间的数字的！”） while mid != num: print ( "Is your secret number " + str(mid) + "?") herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")

看到这个在这里，你可以使用一段时间，所以它运行直到中间比用户选择了一些不同的，以具有打印therem这是非常重要的，否则你将无法看到该程序的新猜测你选择，如果后第一猜测是太低或太高。

  1. 有没有必要重复件“中期= INT（低+高）/ 2”唱完后，你还只是用它和每个while循环运行时它会改变中期的价值。
  2. 你需要启动IF / ELIF /其他字母“C”代码
  3. 您可以删除“打印secretnum”行，之后的一个 如果HERP == 'C'： break elif herp == 'l': low = mid elif herp == 'h': high = mid else: print"Sorry, I did not understand your input." mid = int(low + high)/2 print "Game over. Your secret number was: " + str(mid) 请注意，我用了“破发”离开while循环等消息游戏结束。你的秘密号码是：“+ STR（MID）打印。

最后的结果应该是这样的：

low = 0
high = 100
mid = (high + low)/2

num = raw_input("Please think of a number between 0 and 100!")

while mid != num:
    print ( "Is your secret number " + str(mid) + "?")
    herp = raw_input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")

    if herp == 'c':
        break
    elif herp == 'l':
        low = mid
        #mid = int(mid + high)/2
    elif herp == 'h':
        high = mid
        #mid = int(mid + low)/2
    else:
        print"Sorry, I did not understand your input."
    mid = int(low + high)/2
print "Game over. Your secret number was: " + str(mid)
0
投票

试试下面的代码...

max_num=100
min_num=0
guess = int(abs(max_num/2))
print("Please think of a number between 0 and 100!")
for i in range(min_num,max_num):
  text = "Is your secret number "+str(guess)+"?\nEnter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. "
  xx = raw_input(text)
  if(xx == 'h'):
    max_num = guess
    guess = int((guess + min_num)/2)
  elif(xx == 'l'):
    min_num = guess
    guess = int((guess + max_num)/2)
  elif(xx == 'c'):
    print("Game over. Your secret number was:"+str(guess))
  else:  
    print("Sorry, I did not understand your input.")
    xx = str(input(text))
0
投票

您不必包括int((mid + low)/2)under每if-elif块。下面是相同的行使批准的代码：

print("Please think of a number between 0 and 100!")
low = 0
high = 100
guess = (low + high) // 2

while True:
    print("Is your secret number " + str(guess) + "?")
    suggest = input("Enter 'h' to indicate the guess is too high. Enter 'l' to indicate the guess is too low. Enter 'c' to indicate I guessed correctly. ")
    if suggest == 'l':
        low = guess
    elif suggest == 'h':
        high = guess
    elif suggest == 'c':
        print("Game over. Your secret number was: " + str(guess))
        break
    else:
        print("Sorry, I did not understand your input.")
    guess = (low + high) // 2
最新问题
© www.soinside.com 2019 - 2024. All rights reserved.