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Nimise08
 Post subject: Euclid's Algorithm (In Python)
PostPosted: Mon Jan 07, 2008 1:17 pm 
Little Foot
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Joined: Fri Jan 04, 2008 2:57 pm
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This is the right section to post this right? If not then sorry but does anybody know how I would go about using Euclid's algorithm in python I mean how would I do that.
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smartcat99s
 Post subject:
PostPosted: Mon Jan 07, 2008 3:10 pm 
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A. This is the right section
B. There are several ways to code it. This wikipedia article seems like it would be a good place to start.
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Jipstyle
 Post subject:
PostPosted: Tue Jan 08, 2008 11:32 am 
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We should also point out that we don't do homework here.

We answer specific questions and provide advice and trouble shooting .. that's it. Along with witty dialogue about programming concepts and trivia.
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Nimise08
 Post subject:
PostPosted: Tue Jan 08, 2008 12:13 pm 
Little Foot
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Yea well I diddn,t mean for someone to tell me the code I just wanted some sources on how to and smartcat gave me a good one.


Thanks
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Jipstyle
 Post subject:
PostPosted: Wed Jan 16, 2008 8:24 am 
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Ah! I misunderstood.

Here is another: www.google.com
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Nimise08
 Post subject:
PostPosted: Thu Jan 17, 2008 3:09 am 
Little Foot
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I searched with it but couldn,t find anything realy helpful. So.
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Gadget
 Post subject:
PostPosted: Fri Jan 18, 2008 11:54 pm 
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Why don't you go ahead and post what you have so far and maybe we can you some suggestions on how to improve it.
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wiskitbiscuit
 Post subject: heres my version
PostPosted: Wed Feb 06, 2008 2:53 pm 
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Anyway, here's what I came up with:
Code:
#Euclid common factor
def cfactor(a,b):
  if a > b:
    while b != 0:
      achange = b
      bchange = a%b
      a = achange
      b = bchange
    return a
  else:
    return "a must be greater than b"

#Gets numbers
a = input("a = ")
b = input("b = ")

#Prints common factor
print "The commmon factor is:"
print cfactor(a,b)
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Nimise08
 Post subject:
PostPosted: Wed Feb 06, 2008 4:28 pm 
Little Foot
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Posts: 121
That seems to work unless it,s the wrong answer. I diddn,t come up with anything because I am still learning python :oops: just so you know I don,t start a topic then I stop watching it.
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Gadget
 Post subject: Re: heres my version
PostPosted: Thu Feb 07, 2008 12:45 am 
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wiskitbiscuit wrote:
Anyway, here's what I came up with:

Python implementations are always nice. =)

I would recommend a couple small changes...
- rename the function gcd; gcd is the normal naming convention
- swap a and b if b > a
- use tmp instead of achange and bchange

Code:
#Euclid common factor
def gcd(a,b):
  if b > a:
    tmp = a
    a = b
    b = tmp
  while b != 0:
    tmp = b
    b = a%b
    a = tmp
  return a


Whose has an implementation in another language (besides Java, C#, C or C++).

And what about the least common multiple algorithm?
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wiskitbiscuit
 Post subject:
PostPosted: Fri May 30, 2008 6:26 pm 
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Oh. Now that I look at that, it makes quite a bit of sense. That's one of the reasons I love/hate programming - it's the simple stuff that gets you.
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smartcat99s
 Post subject: Re: heres my version
PostPosted: Sat May 31, 2008 7:03 am 
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Gadget wrote:
wiskitbiscuit wrote:
Anyway, here's what I came up with:

Python implementations are always nice. =)

I would recommend a couple small changes...
- rename the function gcd; gcd is the normal naming convention
- swap a and b if b > a
- use tmp instead of achange and bchange


FYI, nice feature of python here -- one line swaps ;)

Code:
#Euclid common factor
def gcd(a,b):
  if b > a:
    (a, b) = (b, a)
  while b != 0:
    (a, b) = (b, a%b)
  return a
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