View Code of Problem 48

#include<stdio.h>
int main()
{
	int n,i,a=2,b=1;
	float sum=0,t=0;
	scanf("%d",&n);
	if(n>=1&&n<=10)
	{
		for(i=0;i<n;i++)
		{
			sum+=1.0*a/b;
			a=a+b;
			b=a-b;
		}
		printf("%.6f",sum);
	}
	return 0;
}