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  1. #include <iostream>
  2. #include <string>
  3. #include <map>
  4. #include <unordered_map>
  5. #include <atomic>
  6. #include <algorithm>
  7. #include <iterator>
  8.  
  9. int main()
  10. {
  11. 	std::unordered_map<std::string, std::atomic<unsigned int>> m;
  12. 	for (auto p : std::initializer_list<std::pair<std::string, unsigned int>>{{ "a", 32},{ "b" , 22 },{ "c" , 32 },{ "d" , 22 },{ "e" , 55 } })
  13. 		m.emplace(p);
  14.  
  15. 	std::multimap<unsigned int, std::string> printmap;
  16.  
  17. 	std::transform(m.begin(), m.end(), std::inserter(printmap, printmap.end()),
  18. 		[](auto const &p) { return std::make_pair(p.second.load(), p.first); });
  19.  
  20. 	for (auto const &p : printmap)
  21. 		std::cout << p.first << " - " << p.second << std::endl;
  22.  
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 4328KB
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stdin
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Standard input is empty
stdout
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22 - d
22 - b
32 - a
32 - c
55 - e
https://ideone.com/MgtMY8
language:
C++ (gcc 8.3)
created:
7 years ago
visibility:
secret

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