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  1. #include <iostream>
  2. #include <cstring>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	volatile double a = 1.523e32;
  7. 	volatile double b = 0.00000512345;
  8. 	volatile double c = 1243423.43432e-17;
  9. 	volatile double abc = 0.0;
  10. 	abc += a;
  11. 	abc += b;
  12. 	abc += c;
  13. 	volatile double bac = 0.0;
  14. 	bac += b;
  15. 	bac += a;
  16. 	bac += c;
  17. 	std::cout << memcmp((void*)&abc, (void*)&bac, sizeof(double));
  18. 	return 0;
  19. }
Success #stdin #stdout 0s 3340KB
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https://ideone.com/qA3Vb5
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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