[Tutor] Simple guessing game - need help with the math
Hello again,
I'm working on one of the more advanced (at this stage of my learning
process), albeit optional, assignments. The objective is to write a
program that tries to guess your number from 1 to 100. After each guess,
you tell it if it's (h)igher, (l)ower or (c)orrect, and eventually it'll
logically zero in on the correct value. In addition, it should count the
number of tries required to come to the correct guess.
I've worked through a few hiccups so far, but I've come to a standstill.
Here follows my code:
import os
print ("\nShall we play a game?\n\n")
print ("Think of a number, 1 to 100, and I will attempt to guess what it
is.\n")
input("Press [Enter] when ready.\n")
guess = 50
change = 50
answer = ""
tries = 1
while answer == "h" or "l" or "c":
print ("My guess is: ", guess, "\n")
answer = input("Is it (H)igher? (L)ower? Or am I (C)orrect? ")
answer = answer.lower()
if answer == "h":
guess = round(int(guess + (change/2)))
change = change/2
tries += 1
elif answer == "l":
guess = round(int(guess - (guess/2)))
tries += 1
elif answer == "c":
print ("/n/nYay! I win. Shall we play again?\n\n")
os.system('cls' if os.name == 'nt' else 'clear')
else:
print ("Invalid response. Please try again.\n")
Something about the math in the code here isn't quite right. If you were
to enter "h" (for 'higher') each time, it would first guess 50, then 75,
then 87, then 93, then 96, and finally would stop progressing at the number
97. I suspect it's a side-effect of the way the round function works, but
I don't know how to get around it.
Any help would be greatly appreciated.
Thanks in advance,
Greg
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Re: [Tutor] Exercise to work on
Hi Keith, As a follow-up: I'm sure others might have mentioned this, but I also recommend doing exercises presented in the book or reference you're using to learn Python. Cheers, Joseph - Original Message - From: keith papa Hi, am a newbie to python and I wondering if you guys can give me some exercise to work on. I have learned: print function , if function , strings, variables, and raw_input. The more the better ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Exercise to work on
Hi Keith, It depends on what you want to do with Python in the end (by the way, if statement is not a function). Here are some of my suggestions (based on current topics and things to come later): 1. Write a loop which prints even numbers from 1 to 100. 2. Write a program which determines if the entered number is an even or odd number. 3. Given a string, locate the last occurrence of a character. 4. Write a program that says number of characters in a string and whether it starts with a consonant or a vowel. I think that's it for now. Again the rest of the exercises that might show up might depend on your ultimate goal with Python (by the way, which version are you using?). Other topics to learn about would be how to write functions, reading from a file, while and for loops and working with organized data such as lists and dictionaries. Cheers, Joseph - Original Message - From: keith papa Hi, am a newbie to python and I wondering if you guys can give me some exercise to work on. I have learned: print function , if function , strings, variables, and raw_input. The more the better ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Exercise to work on
Keith, This should get you started... http://learnpythonthehardway.org/book/ http://www.codecademy.com/en/tracks/python http://docs.python-guide.org/en/latest/intro/learning/ Happy coding! --Greg On Tue, Aug 12, 2014 at 1:52 PM, keith papa wrote: > Hi, am a newbie to python and I wondering if you guys can give me some > exercise to work on. I have learned: print function , if function , > strings, variables, and raw_input. The more the better > > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
[Tutor] Fwd: Re: Simple guessing game - need help with the math
My apologies, this reply didn't make its way to the list.
>
> On Aug 13, 2014 1:25 AM, "diliup gabadamudalige"
wrote:
> >
> > Wouldn't it be easier to work it this way?
> > for example:
> > number range =100
> > your selection = 82
> >
> > round 1
> > computer guesses 50
> > you say higher
> > then in round 2 the computer makes a guess only between 51 and 100
> > computer guesses 92
> > you say lower
> > round 3 computer guesses between 51 and 91
> > round 4 computer guesses 75
> > you say higher
> > now guess is between 76 and 91
> > etc. till the correct answer is reached
> > you can use the random and range to select a random number between two
numbers
>
> Interesting. I hadn't thought of that. And, it appears that would
circumvent the issue I'm running into with rounding. I will try that
approach; thank-you.
>
> But my curiosity is still begging me for an answer regarding my original
approach. Is there a way to manage the functionality of be round function
such that it does not strip any data to the right of the decimal point?
>
> Thanks,
>
> Greg
>
> >
> >
> >
> > On Wed, Aug 13, 2014 at 4:55 AM, Greg Markham
wrote:
> >>
> >> Hello again,
> >>
> >> I'm working on one of the more advanced (at this stage of my learning
process), albeit optional, assignments. The objective is to write a
program that tries to guess your number from 1 to 100. After each guess,
you tell it if it's (h)igher, (l)ower or (c)orrect, and eventually it'll
logically zero in on the correct value. In addition, it should count the
number of tries required to come to the correct guess.
> >>
> >> I've worked through a few hiccups so far, but I've come to a
standstill. Here follows my code:
> >>
> >> import os
> >>
> >> print ("\nShall we play a game?\n\n")
> >> print ("Think of a number, 1 to 100, and I will attempt to guess what
it is.\n")
> >>
> >> input("Press [Enter] when ready.\n")
> >>
> >> guess = 50
> >> change = 50
> >> answer = ""
> >> tries = 1
> >>
> >> while answer == "h" or "l" or "c":
> >> print ("My guess is: ", guess, "\n")
> >> answer = input("Is it (H)igher? (L)ower? Or am I (C)orrect? ")
> >> answer = answer.lower()
> >> if answer == "h":
> >> guess = round(int(guess + (change/2)))
> >> change = change/2
> >> tries += 1
> >> elif answer == "l":
> >> guess = round(int(guess - (guess/2)))
> >> tries += 1
> >> elif answer == "c":
> >> print ("/n/nYay! I win. Shall we play again?\n\n")
> >> os.system('cls' if os.name == 'nt' else 'clear')
> >> else:
> >> print ("Invalid response. Please try again.\n")
> >>
> >>
> >> Something about the math in the code here isn't quite right. If you
were to enter "h" (for 'higher') each time, it would first guess 50, then
75, then 87, then 93, then 96, and finally would stop progressing at the
number 97. I suspect it's a side-effect of the way the round function
works, but I don't know how to get around it.
> >>
> >> Any help would be greatly appreciated.
> >>
> >> Thanks in advance,
> >>
> >> Greg
> >>
> >> ___
> >> Tutor maillist - Tutor@python.org
> >> To unsubscribe or change subscription options:
> >> https://mail.python.org/mailman/listinfo/tutor
> >>
> >
> >
> >
> > --
> > Diliup Gabadamudalige
> >
> > http://www.diliupg.com
> > http://soft.diliupg.com/
> >
> >
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Re: [Tutor] Simple guessing game - need help with the math
Greg Markham Wrote in message: Please post as text. Because you used html, I cannot quote your message, or indeed even see it at all while replying. There are other problems frequently triggered by html, but on to my response. You don't specify the python version you're writing for. I have to guess 3.x, since your use of input would have been improper in 2.x. Your immediate problem is indeed caused by truncation. In python version 2.x, dividing an int ny 2 will truncate down. You can fix that by using change = int ((1 + change)/ 2) You also need to repeat that in the appropriate elif clause. You do have other problems, however, Your calculation for the new guess is wrong in the elif clause. See if you can spot the problem. Your while loop termination condition will end the loop if a user types something other than one of the three valid ones. And your logic when the user says 'c' starts the next game without reinitializing guess to 50. Your use of round in the guess= lines is superfluous. But you may need to add 1 here as well. I'd suggest starting change at 100, and cutting it in half before adding or subtracting it from the guess. Incidentally, once your code is fixed, it'll converge much faster than the other random suggestion. Further, the binary search technique is well worth understanding and mastering. If I were coding this, then instead of keeping a 'change' variable, I'd keep an upperlimit and a lowerlimit one. Start them at 0 and 101, and start your loop. Each time through the loop your guess would be halfway between the limits. And each time the user tells you that you were high or low, you'd adjust the upperlimit or lowerlimit respectively. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
