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  1. #include<stdio.h>
  2. #include<math.h>
  3. int j (int h);
  4. int main()
  5. {
  6.     double x,r;
  7. int n,c,u,v;
  8. u=-1;
  9. r=1.0;
  10. scanf("%lf %d",&x,&n);
  11. v=n*2;
  12. for(c=0;c<n;c++)
  13. {
  14. r=r+u*pow(x,v)/j(v);
  15. u=-u;
  16. }
  17. printf("%.4f",r);
  18. return 0;
  19. }
  20. int j (int h)
  21. {
  22. int a,b;
  23. for(a=b=1;a<=h;a++)
  24. {
  25. b=b*a;
  26. }
  27. return b;
  28. }
  29.  
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin 
1.5 3
stdout 
0.9842
https://ideone.com/I90ceW
language:
C (clang 8.0)
created:
2 days ago
visibility:
public

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