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  1. #include <iostream>
  2. #include <functional>
  3.  
  4. int twice(int v)
  5. {
  6. 	return v*2;	
  7. }
  8.  
  9. int negate(int v)
  10. {
  11. 	return -v;
  12. }
  13.  
  14. int g( std::function<int(int)> f)
  15. {
  16. 	return f(42);
  17. }
  18.  
  19. int main() {
  20.  
  21. 	std::cout << g(twice) << std::endl;
  22. 	std::cout << g(negate) << std::endl;
  23.  
  24. 	return 0;
  25. }
Success #stdin #stdout 0s 3296KB
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84
-42
https://ideone.com/vw8zs9
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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