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  1. #include <iostream>
  2. #include <unordered_map>
  3. using namespace std;
  4.  
  5. struct Key {
  6.     double x;
  7.     double y; 
  8.     double z;
  9.  
  10.     bool operator==(const Key& k) const{
  11.       return (x == k.x && y == k.y && z == k.z);
  12.     }
  13. };
  14.  
  15. namespace std {
  16. 	template <> struct hash<Key> {
  17. 		unsigned operator()(const Key& arg) const {
  18. 			return 0;
  19. 		}		
  20. 	};
  21. }
  22.  
  23. int main() {
  24. 	std::unordered_map<Key, int> map = {{{1.01, 2.02, 3.03}, 333}};
  25. 	return 0;
  26. }
Success #stdin #stdout 0s 3468KB
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https://ideone.com/fzRXGF
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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