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  1. #include <iostream>
  2. #include <map>
  3. #include <iterator>
  4. #include <algorithm>
  5.  
  6. using namespace std;
  7.  
  8. int main() {
  9. 	map<int,int> m;
  10. 	m[1] = 10;
  11. 	m[2] = 20;
  12. 	m[3] = 30;
  13. 	auto target = 20;
  14. 	auto f20 = std::find_if(std::begin(m), std::end(m), [&](const auto& p) {
  15. 		return p.second == target;
  16. 	});
  17. 	cout << f20->first << " " << f20->second << endl;
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 4516KB
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2 20
https://ideone.com/zJGDtI
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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