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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double ang = M_PI;
  7. 	double rd = sin(ang);
  8. 	float rdf = (float) rd;
  9. 	float rff = sin((float) ang);
  10. 	cout << "        sin(2pi       ): " << rd << endl;
  11. 	cout << "(float) sin(2pi       ): " << rdf << endl;
  12. 	cout << "(float) sin((float)2pi): " << rff << endl;
  13. 	return 0;
  14. }
Success #stdin #stdout 0s 16064KB
comments (?)
stdin 
Standard input is empty
stdout 
        sin(2pi       ): 1.22465e-16
(float) sin(2pi       ): 1.22465e-16
(float) sin((float)2pi): -8.74228e-08
https://ideone.com/Gpxl1x
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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