S.O.S. Mathematics CyberBoard

smith2287 · S.O.S. Newbie Joined: 13 Oct 2009 Posts: 3

Hi all
If You are from side computer science then you are aware of swaping two variables
but i want t swap two variables without using temporary third variable. Question

Ilaggoodly · Posted: Tue, 13 Oct 2009 12:19:21 UTC Post subject:

first of all, a programming language would be a good idea. There is no general method for swapping variables without a temporary.

Actually I'm pretty sure its not possible, it doesn't really make sense how you could swap something without remembering it in between. Basically SOMETHING has to store the data somewhere else temporarily.
_________________

Shadow · Posted: Tue, 13 Oct 2009 14:20:47 UTC Post subject:

You want to use your logical operators am I right? This is actually a classic problem if so.
_________________
(\ /)
(O.o)
(> <)
This is Bunny. Copy Bunny into your signature to help him on his way to world domination

Denis · Posted: Tue, 20 Oct 2009 14:47:30 UTC Post subject:

Qbasic has command SWAP(a,b).
User does not need to use 3rd variable; however that doesn't eliminate the need!
_________________
I upped my standards, so up yours !

aswoods · Posted: Tue, 20 Oct 2009 16:39:52 UTC Post subject:

Hint: no need for swap if uxorious

Shadow · Posted: Tue, 20 Oct 2009 20:58:30 UTC Post subject:

nishaanth · Posted: Thu, 5 Nov 2009 13:45:42 UTC Post subject:

x=x+y;
y=x-y;
x=x-y;
will do
_________________
CODE UR LIFE

	S.O.S. Mathematics CyberBoard Forum Index -> Computer Science	All times are UTC
Page 1 of 1