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  1. #include<stdio.h>
  2. int f( double h ) ;
  3. int main()
  4. {
  5.     double a,n,s ;
  6. s=0;
  7.     scanf("%lf",&n);
  8. for(a=1;a<=n;a++)
  9. {
  10. s=s+f(a+2)/f(a+1);
  11. }
  12. printf("%.6f",s);
  13.     return 0 ;
  14. }
  15. int f ( double  h )
  16. {
  17. 	if((h==1)||(h==2))
  18. 	{
  19. 		return 1 ;
  20. 	}
  21. 	else
  22. 	{
  23. 		return f(h-1)+f(h-2) ;
  24. 	}
  25. }
Success #stdin #stdout 0s 5324KB
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stdin
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3
stdout
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4.000000
https://ideone.com/tIoq68
language:
C (clang 8.0)
created:
11 days ago
visibility:
public

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