Payal Rathod schrieb:

Hello Payal! I think I should have made some comments on your comments --

> On Mon, Jun 30, 2003 at 10:33:36AM -0700, Danny Yoo wrote:
>   
> 
> >Same mistake as last time.  *grin* The code is simply dropping the value
> >that you're calculating from doing euclid().  We need to capture that
> >value:
> >    
> >
> 
> Sorry Danny I am still not getting it. Now I am so confused that I think
> I don't know what exactly a function does and what is it it returns.
> 
> I have posted my code below with some comments regarding issues I don't
> get.
> 
> #!/usr/local/bin/python
> 
> def euclid(a,b):
>         while b != 0:
>                 c = a
>                 a = b
>                 b = c % a
>                 print 'A = ', a
>                 print 'B = ', b
>                 return euclid(a,b)
> # What will this return exactly?
> 
#- this will return the gcd of b and the rest when a is divided by b

>         else:
>                 return a
> 
> x = 100
> y = 20
> 
> result = euclid(x, y)
> 
> # Why do we define x and y here seperately?
> # Can't we have result = euclid(100,20)
> # This apparently is not working. 
> 
#-- I tried it out and it - not surprisingly - worked!

> 
> print x
> print y
> 
> # This always prints 100 and 20. I think it should print the present values
> # of x and y which are not 100 and 20 always.
>   
> 
#-- These remain 100 and 20 respectively, because your code doesn't contain
#-- statements, which change the values of x and y.
#--  Only the values of a and b (and c) are changed, but these are 
entirely different
#-- variables, local to the function euclid and not globally visible. 
The change of
#-- their values is revealed by your print-statements.

> print result
> 
> # The result is given as 20 which I think is wrong. 
> 
#-- Why do you think this is wrong? What do you think is the greatest
#-- common divisor of 100 and 20?

> # Is there anything 
> # wrong with my mathematical logic or my function?
>   
> 
#-- Hmm ??? See my previous posting.

Best wishes, Gregor

> With warm regards,
> -Payal
> 
> 
>   
> 





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