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  1. #include <iostream>
  2. #include <functional>
  3. #include <vector>
  4. #include <algorithm>
  5.  
  6. bool my_func1()
  7. {
  8. 	return true;
  9. }
  10.  
  11. bool my_func2()
  12. {
  13. 	return false;
  14. }
  15.  
  16. bool my_func3()
  17. {
  18. 	return true;
  19. }
  20.  
  21. bool my_func4()
  22. {
  23. 	return false;
  24. }
  25.  
  26. int main() 
  27. {
  28. 	std::vector<std::function<bool()>> functions = {
  29. 		my_func1,
  30. 		my_func2,
  31. 		my_func3,
  32. 		my_func4
  33. 	};
  34.  
  35. 	unsigned long failure = 
  36. 		std::count_if(functions.begin(), functions.end(), 
  37. 			[](const std::function<bool()>& function) { return !function(); });
  38. 	std::cout << "There was " << failure << " failures." << std::endl;
  39. 	return 0;
  40. }
Success #stdin #stdout 0s 3432KB
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stdin
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Standard input is empty
stdout
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There was 2 failures.
https://ideone.com/0voxRl
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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