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Programming-Idioms

Print each key k with its value x from an associative array mymap, in ascending order of k.
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Other implementations
#include <iostream>
#include <map>
std::map< K, V > _mymap;
for (const auto& pair : _mymap) {
    std::cout << pair.first << ": " << pair.second << "\n";
}

std::map is a sorted collection that uses std::less by default.