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  1. #include <map>
  2. #include <string>
  3. #include <tuple>
  4. #include <iostream>
  5.  
  6. struct myStruct {  int x, y; };
  7. using Key =  std::pair<std::string, std::string>;
  8.  
  9. namespace something
  10. {
  11.     struct Compare
  12.     {
  13.         bool operator()(const Key& lhs, const Key& rhs) const
  14.         {
  15.             // do the required comparison here
  16.             return std::tie(lhs.first, lhs.second) < std::tie(rhs.first, rhs.second);
  17.         }
  18.     };
  19. }
  20. using myMap = std::map<Key, myStruct, something::Compare>;
  21.  
  22. int main()
  23. {
  24. 	myMap mp =
  25. 	{
  26. 		{ { "name1", "name2" },{ 3,4 } },
  27. 		{ { "aame1", "name2" },{ 8,4 } },
  28. 		{ std::make_pair("fame1", "name2"),{ 2,4 } }, // or make pair
  29. 		{ std::make_pair("fame1", "bame2"),{ 1,2 } }
  30. 	};
  31.  
  32. 	for(const auto& it: mp)
  33.     {
  34.         std::cout << it.first.first << " " << it.first.second << " "
  35.                  << it.second.x << " " << it.second.y << std::endl;
  36.     }
  37.  
  38. 	return 0;
  39. }
  40.  
Success #stdin #stdout 0s 4544KB
comments (?)
stdin
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Standard input is empty
stdout
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aame1 name2 8 4
fame1 bame2 1 2
fame1 name2 2 4
name1 name2 3 4
https://ideone.com/fTbIcX
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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