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  1. #include<iostream>
  2. #include <unordered_map>
  3.  
  4. using namespace std;
  5. int main(int argc, char** argv) {
  6. 	unordered_map<int, int> map1{ 
  7. 		{1, -10}, 
  8. 		{10, -1}, 
  9. 		{2, 5}, 
  10. 	};
  11. 	decltype(map1) map2;
  12.  
  13. 	for(auto &elem: map1) {
  14. 		if(elem.second < 0) {
  15. 			map2.emplace(elem.first, elem.second);
  16. 			map1.erase(elem.first);
  17. 		}
  18. 	}
  19.  
  20. 	for(auto &elem: map2) {
  21. 		cout << "negative value pair = " << elem.first << ", " << elem.second << endl;
  22. 	}
  23. }
Success #stdin #stdout 0s 15232KB
comments (?)
stdin 
Standard input is empty
stdout 
negative value pair = 1, -10
https://ideone.com/l4I4Kt
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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