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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=0.0;
  8.     scanf("%d",&n);
  9. for(a=1;a<=n;a++)
  10. {
  11. s=s+f(a+2)/f(a+1)*1.0;
  12. }
  13. printf("%.6f",s);
  14.     return 0 ;
  15. }
  16. int f ( int  h )
  17. {
  18. int i,o,p,u;
  19. i=o=1;
  20.  
  21. 	if((h==1)||(h==2))
  22. 	{
  23. 		return 1 ;
  24. 	}
  25. 	else
  26. 	{
  27. 		for(u=3;u<=h;u++)
  28. {
  29. p=i+o;
  30. i=o;
  31. o=p;
  32. }
  33. return p;
  34. 	}
  35. }
Success #stdin #stdout 0.01s 5284KB
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3
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4.000000
https://ideone.com/haOvaG
language:
C (clang 8.0)
created:
1 day ago
visibility:
public

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