View Code of Problem 48

#include<stdio.h>
#include<string.h>
int main()
{
	double sum=0,a=2,b=1,t;
	int count,n=0;
	
	scanf("%d",&count);
	while(n<count) 
	{
		sum+=a/b;
		
		t=a+b;
		b=a;
		a=t;
		n++; 
	}
	printf("%.6lf",sum);
}