anonymous
  • anonymous
(ps1b) My program seems to be stuck in an infinite loop, but I'm not sure how this is happening. Code: http://dpaste.com/533437/
MIT 6.00 Intro Computer Science (OCW)
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anonymous
  • anonymous
(ps1b) My program seems to be stuck in an infinite loop, but I'm not sure how this is happening. Code: http://dpaste.com/533437/
MIT 6.00 Intro Computer Science (OCW)
schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
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Shriram
  • Shriram
what input does it give you an infinite loop?
anonymous
  • anonymous
You're asking for input from the user with raw_input(), which returns a string rather than an integer.
anonymous
  • anonymous
Yeah, change line 7 to n = int(raw_input()) and it should be fixed But I'm pretty sure there's also a logical error... How are you checking whether primeCandidate is actually prime?

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anonymous
  • anonymous
If the number is divisible by a whole number then the number is not added to the sum and primeCandidate is incremented. If the divisor is greater than half of primeCandidate, that means that no whole number evenly divides into it, making it prime. There does still seem to be a problem with my program logically, so please let me know if see a problem in that logic. Right now my ratio converges to zero instead of one. Thanks.
anonymous
  • anonymous
You're taking the log of the sum rather than the sum of the logs. Also, you're missing 3 from your prime numbers. You can fix that by initiating primeSum with log(2) + log(3) at the beginning.
anonymous
  • anonymous
You're also missing the last prime number when the input is prime. For example, when I enter a prime number 7919, that number doesn't get added in.
anonymous
  • anonymous
one way to make your program faster at least is to skip all even numbers since no even numbers past 2 are prime. thatll cut the amount of numbers processed in half. another suggestion would be to write a separate function to detect if the number is prime or not something like def isPrime(a): i = 0 while (i
anonymous
  • anonymous
Thanks so much for the help everyone!

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