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  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)/f(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 0.01s 5272KB
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stdin
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3
stdout
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3.000000
https://ideone.com/ac6Xk9
language:
C (clang 8.0)
created:
6 days ago
visibility:
public

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