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Performing a swap using pass-by-reference.
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Engine
Template / Reference solution
 
#include <iostream>
using namespace std;
void exchange(\[int& a, int& b]\) {
\[
   int tmp = a;
   a = b;
   b = tmp;
]\
}
int main() {
   int x = 103;
   int y = 99;
   exchange(x, y);
   cout << "x is " << x << ", y is " << y << endl;
}
C++ test suite
json list of stdin/args tests
e.g. [{"stdin":"hi", "args":["4", "5"]},
{"stdin":"noargs"}]

to just run once with no input use [{}]
 
[
   {}
]
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Note: problems are open-source by default (see 'Public permissions'). Assumed license for open problems is Creative Commons 4.0 Attribution-ShareAlike unless specified in 'Remarks'.