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  1. #include <iostream>
  2. #include <math.h>
  3. using namespace std;
  4.  
  5. int main() {
  6. 	double E = 1e-1;
  7. 	double x = -1;
  8. 	double sum = 0.0;
  9. 	for(int i = 2; fabs(x) > E ; i++){
  10. 		sum += x;
  11. 		//cout << x << " " ;
  12.  
  13. 		x *= (-1./i);
  14.  
  15. 	}
  16. 	cout << sum;
  17. 	return 0;
  18. }
Success #stdin #stdout 0s 3456KB
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-0.666667
https://ideone.com/jIBbYb
A119 в
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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