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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5.  
  6. struct Struct
  7. {
  8. 	Struct(long value) :
  9. 		_value_1(value),
  10. 		_value_2(10 - value)
  11. 	{}
  12.  
  13. 	long _value_1;
  14. 	long _value_2;
  15. };
  16.  
  17. template <typename StructureType, 
  18. 			typename MemberType, 
  19. 			MemberType StructureType::*member>
  20. bool comparator(const StructureType& the_first, const StructureType& the_second)
  21. {
  22. 	return the_first.*member < the_second.*member;
  23. }
  24.  
  25. int main(int argc, char const *argv[])
  26. {
  27.  
  28. 	std::vector<Struct> vect = { 1, 2, 3, 4, 5 };
  29. 	auto result_1 = 
  30. 		std::max_element(std::begin(vect), std::end(vect), 
  31. 		                 comparator<Struct, long, &Struct::_value_1>);
  32. 	auto result_2 = 
  33. 		std::max_element(std::begin(vect), std::end(vect), 
  34. 		                 comparator<Struct, long, &Struct::_value_2>);
  35.  
  36. 	std::cout 
  37. 		<< "Result 1:" << result_1->_value_1 << std::endl
  38. 		<< "Result 2:" << result_2->_value_2 << std::endl;
  39.  
  40. 	return 0;
  41. }
Success #stdin #stdout 0s 3472KB
comments (?)
stdin 
Standard input is empty
stdout 
Result 1:5
Result 2:9
https://ideone.com/K8ytav
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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