tricky thing

edijs · 14-06-2007, 12:14 PM

okay, um, can anyone tell me how one can exchange the values of two variables without using a temporary variable?

edijs · 14-06-2007, 11:49 AM

not tricky after all...

Code:

Program 1uzd;

Var a,b:integer;

Begin

a:=1;
b:=2;

a:=a+b;
b:=a-b;
a:=b-a;


end.

apologees

Addis · 14-06-2007, 12:53 PM

Why would you want to do that? The C++ STL has swap() which is optimised for your architecture. I guess this one of those "Do it without the obvious way" things.

14-06-2007, 12:14 PM	#1 (permalink) Top
edijs Programmer Join Date: Sep 2006 Age: 22 Male Posts: 523 Times Helpful: 16 My Mood: Busy Status: Offline My Computer	tricky thing okay, um, can anyone tell me how one can exchange the values of two variables without using a temporary variable?

14-06-2007, 11:49 AM	#2 (permalink) Top
edijs Programmer Join Date: Sep 2006 Age: 22 Male Posts: 523 Times Helpful: 16 My Mood: Busy Status: Offline My Computer	not tricky after all... Code: Program 1uzd; Var a,b:integer; Begin a:=1; b:=2; a:=a+b; b:=a-b; a:=b-a; end. apologees

14-06-2007, 12:53 PM	#3 (permalink) Top
Addis The King Join Date: Jan 2004 Age: 18 Male Posts: 5,255 Times Helpful: 403 My Mood: Drunk Status: Offline My Computer	Why would you want to do that? The C++ STL has swap() which is optimised for your architecture. I guess this one of those "Do it without the obvious way" things. __________________ Never trust a program you don't have the source code for. My website \| Powerful Desktop Linux \| Linux for human beings \| Linux for power users \| Linux for ricers

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