swap numbers

K&R C Programs Exercise 4-14

Posted on by Sandeepa Nadahalli

Exercise 4-14. Define a macro swap(t,x,y) that interchanges two arguments of type t. (Block structure will help.) A three-argument swap macro: t is the type, x and y are the variables to swap. The block { … } creates a local scope for the temporary, preventing name leakage. The conventional temp variable name _swap_tmp (with …

C Program To Swap Two Variables

Posted on by Sandeepa Nadahalli

Swapping two variables is one of the most common operations in sorting, data structure manipulation, and algorithm implementation. There are three standard methods: using a temporary variable (clearest), arithmetic (no temp, but overflow risk), and XOR bit manipulation (no temp, no overflow, but tricky for same-variable self-swap). All three produce the same result — understanding …