View Code of Problem 48

#include<stdio.h>
#include<string.h>
int main()
{
	int n;
	double sum=0,x=1,y=2,t;
	scanf("%d",&n);
	for(int i=0;i<n;i++)
	{
		sum+=y/x;
		t=x;
		x=y;
		y=y+t;
	}
	printf("%lf",sum);
	return 0;
}