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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. int main() {
  5. 	int n,i;
  6. 	double x;
  7. 	double sum=0;
  8. 	std::cin >> n >> x;
  9. 	for(i=1;i<=n;i++) {
  10. 		sum = pow(-1.0,i-1)*(pow(x,2.0*i)/((2.0*i)+(pow(-1.0,i)*(pow(x,2.0*i+1.0)/((2.0*i)+1.0)))));
  11. 	}
  12. 	std::cout << "Summa: S(" << x << ")=" << sum << "\n";
  13. 	std::cout << "Arctg: A(" << x << ")=" << atan(x) << "\n";
  14. 	return 0;
  15. }
Success #stdin #stdout 0s 3472KB
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2
0.5
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Summa: S(0.5)=-0.0156006
Arctg: A(0.5)=0.463648
https://ideone.com/YfKIdr
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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