View Code of Problem 48

#include <stdio.h>
int main()
{
	int n;
  	double t,a=2.0,b=1.0,av,sum=0.0;
  	scanf("%d",&n);
  	a=2,b=1;
  	for(int i=0;i<n;++i)
        {
        	av=a/b;
          	sum+=av;
          	t=a;
          	a=a+b;
          	b=t;
        }
  	printf("%.6lf",sum);
 
 
 
 
 
 
 
}