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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	long double x = 18446744073709551616.0L;
  7.  
  8. 	long double badFractional1 = x - (int)x;
  9. 	long double badFractional2 = x - (long long)x;
  10. 	long double badFractional3 = x - (unsigned long long)x;
  11.  
  12. 	long double integral, goodFractional = modf(x, &integral);
  13.  
  14. 	cout << "Value: " << x << endl;
  15. 	cout << "Bad1: " << badFractional1 << endl;
  16. 	cout << "Bad2: " << badFractional2 << endl;
  17. 	cout << "Bad3: " << badFractional3 << endl;
  18. 	cout << "Good: " << goodFractional << endl;
  19. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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Value: 1.84467e+19
Bad1: 1.84467e+19
Bad2: 9.22337e+18
Bad3: 1
Good: 0
https://ideone.com/CJATWf
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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