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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. int main(void) 
  5. {
  6. 	int n, x;
  7. 	scanf("%d %d", &n, &x);
  8. 	double s=0;
  9. 	for(int i=1; i<=n; i++)
  10. 	{
  11. 		if (i%2==0)
  12. 		{
  13. 			s-=2*(sin(i*x)/i);
  14. 		}
  15. 		else
  16. 		{
  17. 			s+=2*(sin(i*x)/i);
  18. 		}
  19. 	}
  20. 	printf ("summa= %lf\n", s);
  21. 	return 0;
  22. }
  23.  
Success #stdin #stdout 0s 2296KB
comments (?)
stdin 
1
5
stdout 
summa= -1.917849
https://ideone.com/4vVvsR
ю3.32 готово
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
secret

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