View Code of Problem 71

#include "stdio.h"
#include "math.h"
#include "string.h"

void  main()
{
	int i,n;
	double sum=0;
	double a[100];
	a[0]=0;
	a[1]=1;
	scanf("%d",&n);
	for(i=2;i<=n+2;i++)
		a[i]=a[i-2]+a[i-1];//printf("%d ",a[i]);
	for(i=2;i<=n+1;i++)
	{
		sum=sum+a[i+1]/a[i];
	}
	printf("%.2lf",sum);
}