[Tutor] Why won't it enter the quiz? (off topic)
keridee at jayco.net
Fri Sep 30 02:33:41 CEST 2005
Wow! What an argument...
A couple of comments on the code
> import random
> def add(a,b):
> answer = a+b
> guess = float(raw_input(a," + ",b," = "))
This is easier IMHO, but the same
guess = float(raw_input("%s+%s="%(a,b)))
> return answer, guess
> num1 = random.choice(range(1,10)) ### To limit the numbers chosen from 1-9
> num2 = random.choice(range(1,10))
Oh my. Read the documentation on the random module.
Specifically random.randrange or even random.randint
Note: the difference between the two -- a <= result < b as opposed to a <=
result <= b
> while 1:
> q = random.choice(range(15,31)) ### to choose the number of questions
> cq = 1 ### To find the current question
> correct = 0
> while cq >= q: ### To find whether or not to end the quiz.
Of course, this has been corrected to while cq <= q:
> print cq
> answer, guess = add(num1,num2)
> if guess != answer:
> print "Incorrect! The correct answer is: ",answer
> cq += 1
> elif guess == answer:
> print "Correct!"
> correct += 1
> cq += 1
> print "Questions: ",q
> print "Correct: ",correct
> print "Percent Correct: ",(cq/q)*100
Okay, this is a problem -- Due to the integer division cq/q, Percent Correct
will only display 0, ever
> print "Goodbye."
They probably won't see the stats because the program will execute the four
print statements and immediately exit. I suggest changing the last
raw_input("Goodbye. Press enter to exit. ")
I have one more comment. The code in the add function doesn't really seem
to be that well grouped together ~ IOW, it seems like you defined a function
just because you felt like you needed practice typing def something(args):
It seems much easier (in this case) to just leave the add() code in the
actual main block. Does this make sense?
Oops. I have two comments. In add() (which I suggest removing) you define
guess with float(...) whereas your answer is an integer. (a+b) So you may
run into trouble with floating point precision.
For example. ~~Okay, I stand corrected, in my test, none (out of 0-100) gave
me any trouble.
Hope this helps,
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