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  1. #include <iostream>
  2. #include <array>
  3. #include <algorithm>
  4. using namespace std;
  5.  
  6. bool is_right_triangle(array<int, 3> sides) {
  7. 	decltype(sides) squares;
  8.  
  9. 	auto square = [](int x){ 
  10. 		return x*x;
  11. 	};
  12.  
  13. 	sort(begin(sides), end(sides));
  14. 	transform(begin(sides), end(sides), begin(squares), square);
  15.  
  16. 	return squares[0]+squares[1] == squares[2];
  17. }
  18.  
  19. int main() {
  20. 	cout << boolalpha;
  21.  
  22. 	cout
  23. 		<< is_right_triangle({3, 4, 5}) << endl
  24. 		<< is_right_triangle({6, 10, 8}) << endl
  25. 		<< is_right_triangle({75, 21, 72}) << endl
  26. 		<< endl;
  27.  
  28. 	cout
  29. 		<< is_right_triangle({13, 4, 5}) << endl
  30. 		<< is_right_triangle({16, 10, 8}) << endl
  31. 		<< is_right_triangle({175, 21, 72}) << endl
  32. 		<< endl;
  33. 	return 0;
  34. }
Success #stdin #stdout 0s 15240KB
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Standard input is empty
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true
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false
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https://ideone.com/YGwdlo
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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