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  1. #include <cmath>
  2. #include <iostream>
  3. #include <iomanip>
  4.  
  5. double calcPi(double precision){
  6. 	double PI = 1.0, temp;
  7.  
  8. 	for(double i = 0.0; i < precision; i++){
  9. 		temp = 1.0;
  10. 		temp /= (3 + i * 2) * pow(3, i + 1);
  11. 		PI += (int(i) % 2 == 0)? -temp : temp;
  12. 	}
  13. 	return sqrt(12) * PI;
  14. }
  15.  
  16. int main() {
  17. 	std::cout << std::setprecision(500) << calcPi(50000) << std::endl;
  18. 	return 0;
  19. }
Success #stdin #stdout 0.01s 3296KB
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3.141592653589793560087173318606801331043243408203125
https://ideone.com/c5kHFx
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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