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  1. #include <functional>
  2. #include <iostream>
  3. #include <map>
  4. #include <string>
  5.  
  6. using namespace std;
  7.  
  8. int main() {
  9. 	map<int, string, greater<int>> foo(greater<int>{});
  10. 	//map<int, string> foo(greater<int>()); Doesn't work
  11. 	map<int, string, function<bool(const int&, const int&)>> bar([](const int& lhs, const int& rhs){ return lhs > rhs; });
  12. 	//map<int, string> bar([](const int& lhs, const int& rhs){ return lhs > rhs; }); Doesn't work
  13.  
  14. 	foo[1] = "one"s;
  15. 	foo[2] = "two"s;
  16. 	bar[3] = "three"s;
  17. 	bar[4] = "four"s;
  18.  
  19. 	for(auto& i : foo) {
  20. 		cout << i.first << ':' << i.second << endl;
  21. 	}
  22.  
  23. 	for(auto& i : bar) {
  24. 		cout << i.first << ':' << i.second << endl;
  25. 	}
  26. }
Success #stdin #stdout 0s 3420KB
comments (?)
stdin
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Standard input is empty
stdout
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2:two
1:one
4:four
3:three
https://ideone.com/1Ygrze
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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