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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double x, eps, left, right, d, s;
  7. 	cin >> x >> eps;
  8. 	int n=0;
  9. 	left=atan(x);
  10. 	right=x;
  11. 	d=fabs(left-right);
  12. 	s=x;
  13. 	while(d>eps)
  14. 	{
  15. 		n++;
  16. 		s*=(-1)*x*x;
  17. 		right+=s/(2*n+1);
  18. 		d=fabs(left-right);
  19. 	}
  20. 	cout << "left=" << left << " right=" << right << " n=" << n << " d=" << d;
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 3432KB
comments (?)
stdin 
0.7 0.00000000001
stdout 
left=0.610726 right=0.610726 n=28 d=8.34648e-12
https://ideone.com/DIWfdt
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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