using a temp variable is considered to be the best option.. On 7/11/11, Dave <dave_and_da...@juno.com> wrote: > @Vaibhav: Your method b doesn't work for floating point numbers > because they have finite precision. E.g.,as an extreme example, try it > on a = 1 and b = 1d-25. When you form a+b, the result is 1, not 1 + > 1d-25. Then 1 - 1d-25 gives 1 (which is correct), and 1 - 1 = 0. The > latter should be 1d-25, so you have a total loss of precision in that > number. More common would be just a partial loss of precision. > > Dave > > On Jul 10, 3:55 pm, vaibhav shukla <vaibhav200...@gmail.com> wrote: >> On Mon, Jul 11, 2011 at 1:51 AM, aanchal goyal >> <goyal.aanch...@gmail.com>wrote: >> >> > These are the various ways to swap 2 variables >> > a) Using temporary Variable >> >> always inefficient. using extra memory. >> >> > b) Usnig some Arithmentic operation >> >> works for all numbers even floating points >> a and b are two no. to swap : a=a+b; >> b=a-b; >> a=a-b; >> always works >> >> > c) Using bitwise XOR operation >> >> since bitwise results an error in floating point numbers so this method >> also fails. >> hence (b) is better among the three.what say ? >> >> >> >> > -- >> > You received this message because you are subscribed to the Google >> > Groups >> > "Algorithm Geeks" group. >> > To post to this group, send email to algogeeks@googlegroups.com. >> > To unsubscribe from this group, send email to >> > algogeeks+unsubscr...@googlegroups.com. >> > For more options, visit this group at >> >http://groups.google.com/group/algogeeks?hl=en. >> >> -- >> best wishes!! >> Vaibhav Shukla >> DU-MCA > > -- > You received this message because you are subscribed to the Google Groups > "Algorithm Geeks" group. > To post to this group, send email to algogeeks@googlegroups.com. > To unsubscribe from this group, send email to > algogeeks+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/algogeeks?hl=en. > >
-- *Piyush Sinha* *IIIT, Allahabad* *+91-8792136657* *+91-7483122727* *https://www.facebook.com/profile.php?id=100000655377926 * -- You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com. To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/algogeeks?hl=en.
