fork download
copy 
  1. #include<stdio.h>
  2. int f( int h ) ;
  3. int main()
  4. {
  5.     int a,n ;
  6. double s;
  7. s=0;
  8.     scanf("%d",&n);
  9. for(a=1;a<n;a++)
  10. {
  11. s=s+f(a+2)/(2*a-1);
  12. }
  13. printf("%.6f",s);
  14.     return 0 ;
  15. }
  16. int f ( int  h )
  17. {
  18. 	if((h==1)||(h==2))
  19. 	{
  20. 		return 1 ;
  21. 	}
  22. 	else
  23. 	{
  24. 		return f(h-1)+f(h-2) ;
  25. 	}
  26. }
Success #stdin #stdout 0s 5320KB
comments (?)
stdin
copy 
3
stdout
copy 
3.000000
https://ideone.com/lvFtFw
language:
C (clang 8.0)
created:
6 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!