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  1. #include<stdio.h>
  2. #include<math.h>
  3. double j (double h);
  4. int main()
  5. {
  6.     double x,r;
  7. int n,c,u,v;
  8. while(scanf("%lf %d",&x,&n)!=EOF)
  9. {
  10. u=-1;
  11. r=1.0;
  12. v=n*2;
  13. for(c=2;c<=v;c=c+2)
  14. {
  15. r=r+u*pow(x,c)/j(c);
  16. u=-u;
  17. }
  18. printf("%.4f\n",r);
  19. }
  20. return 0;
  21. }
  22. double j (double h)
  23. {
  24. int a,b;
  25. for(a=b=1;a<=h;a++)
  26. {
  27. b=b*a;
  28. }
  29. return b;
  30. }
  31.  
Success #stdin #stdout 0s 5304KB
comments (?)
stdin
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1.5 3
0 100
stdout
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0.0701
-nan
https://ideone.com/STkOab
language:
C (clang 8.0)
created:
1 day ago
visibility:
public

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