83. Swap Two Values Inside a Function
Core1000 ms256 MBSolved by 0%
Read two integers and print them swapped, separated by a space.
The exercise is not the swapping, it is doing it inside a function that changes the caller's variables rather than its own copies.
In C and C++ that means passing pointers or references. In Java, Python and JavaScript numbers are passed by value and cannot be changed that way at all, so the equivalent is to return both values, or to pass something mutable such as an array.
Constraints - `-1000000000 ≤ a, b ≤ 1000000000`
Input
A single line containing two integers, separated by a space.
Output
Print the two integers on one line, separated by a single space, in the opposite order.
Input3 7
Output7 3
Noteswaps two ordinary values
Input-5 12
Output12 -5
Noteswaps across a sign change
Hints
Four rungs, in order. The last two open once you have submitted an attempt. A wrong one counts.
Hint 1Where to start
Hint 2The approachOpen hint 1 first. This one carries on from it.
Hint 3PseudocodeOpen hint 2 first. This one carries on from it.
Hint 4Full solutionOpen hint 3 first. This one carries on from it.