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  1. #include <iostream>
  2. #include <cmath>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double x, e;
  7. 	cin>>x>>e;
  8. 	double sum1=x; // для i=0
  9. 	double sum2=-x*x*x/6; // для i=1
  10. 	for (int i=2; abs(1/sum2-1/sum1)>=e; i++)
  11. 	{
  12. 		sum1=sum2;
  13. 		sum2*=-x*x/((2*i)*(2*i+1)); 
  14. 	}
  15. 	cout<<1/sum2<<endl;
  16. 	return 0;
  17. }
Success #stdin #stdout 0s 3464KB
comments (?)
stdin 
-82 0.0001
stdout 
-3.23677e-08
https://ideone.com/dPLUbo
косеканс
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
secret

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