Swap two integers in 'C' programming Without using third variable #cprogram #c #clanguage #swap Programmer Rushikesh Programmer Rushikesh Programmer Rushikesh Joined Aug 17, 2018 Dec 17, 2018 ・1 min read C programming (2 Part Series) 1 Swap two integers in 'C' programming 2 Swap two integers in 'C' programming Without using third variable C program to swap two integers without using third variable Discussion (4) Subscribe Upload image Templates Editor guide Personal Moderator Create template Templates let you quickly answer FAQs or store snippets for re-use. Submit Preview Dismiss Collapse Expand Frank Puffer • Dec 17 '18 • Edited on Dec 17 Dropdown menu Copy link Hide While it does have some educational value to show that this is possible, this method has two issues: Both a = a + b and a = a - b can cause an overflow. I can't imagine many situations where saving a few bytes really makes up for the loss in readability. Collapse Expand Günther Jena • Dec 30 '18 • Edited on Dec 30 Dropdown menu Copy link Hide It also works with XOR (avoiding the overflow problem): a = a ^ b b = a ^ b a = a ^ b Enter fullscreen mode Exit fullscreen mode Collapse Expand Jason C. McDonald • Feb 8 '19 Dropdown menu Copy link Hide Agreed, this is definitely the way to do it. Collapse Expand Joe Carnuccio • Feb 6 '19 • Edited on Feb 6 Dropdown menu Copy link Hide reduced to one line: a ^= b ^= a ^= b; Code of Conduct • Report abuse
Discussion (4)
While it does have some educational value to show that this is possible, this method has two issues:
Both
a = a + banda = a - bcan cause an overflow.I can't imagine many situations where saving a few bytes really makes up for the loss in readability.
It also works with XOR (avoiding the overflow problem):
Agreed, this is definitely the way to do it.
reduced to one line:
a ^= b ^= a ^= b;