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  1. #include <string>
  2. #include <iostream>
  3. #include <vector>
  4. #include <atomic>
  5. #include <algorithm>
  6. #include <unordered_map>
  7. using namespace std;
  8.  
  9. int main() {
  10.     std::unordered_map<std::string, std::atomic<unsigned int>> m;
  11.     m["quick"] = 0;
  12.     m["brown"] = 1;
  13.     m["fox"] = 2;
  14.     m["jumps"] = 3;
  15.     m["over"] = 4;
  16.     m["the"] = 5;
  17.     m["lazy"] = 6;
  18.     m["dog"] = 7;
  19.     std::vector<pair<unsigned int,std::string>> copy;
  20.     std::transform(
  21.         m.begin()
  22.     ,   m.end()
  23.     ,   back_inserter(copy)
  24.     ,   [](const pair<const std::string, std::atomic<unsigned int>>& p) {
  25.             return make_pair(p.second.load(), p.first);
  26.     });
  27.     for (auto it : copy) 
  28.         std::cout << " " << it.first << ":" << it.second << std::endl;
  29.     std::cout << "==========" << std::endl;
  30.     std::sort(copy.begin(), copy.end());
  31.     for (auto it : copy) 
  32.         std::cout << " " << it.first << ":" << it.second << std::endl;
  33.     return 0;
  34. }
Success #stdin #stdout 0s 4372KB
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stdin
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Standard input is empty
stdout
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 7:dog
 6:lazy
 5:the
 3:jumps
 4:over
 0:quick
 1:brown
 2:fox
==========
 0:quick
 1:brown
 2:fox
 3:jumps
 4:over
 5:the
 6:lazy
 7:dog
https://ideone.com/zMPYPr
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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