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  1. #include <iostream>
  2.  
  3. typedef bool(*DefaultComparator)(int);
  4.  
  5. bool NumberIsEven(int i)
  6. {
  7. 	return i % 2 == 0;
  8. }
  9.  
  10. template<typename compare = DefaultComparator>
  11. void CheckNumber(int j, compare cmp = nullptr)
  12. {
  13. 	if (j > 0 && (cmp ? cmp(j) : true))
  14. 		std::cout << "checked" << std::endl;
  15. 	else
  16. 		std::cout << "failed" << std::endl;
  17. }
  18.  
  19. int main()
  20. {
  21. 	CheckNumber(1);
  22. 	CheckNumber(1, NumberIsEven);
  23. 	CheckNumber(2);
  24. 	CheckNumber(2, NumberIsEven);
  25. }
Success #stdin #stdout 0s 4572KB
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https://ideone.com/31qNyP
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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