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// swap (pair overload)
#include <utility> // std::pair
#include <iostream> // std::cout
int main () {
std::pair<int,char> foo (10,'a');
std::pair<int,char> bar (90,'z');
swap (foo,bar);
std::cout << "foo contains: " << foo.first;
std::cout << " and " << foo.second << '\n';
return 0;
}
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