View Code of Problem 48

#include<stdio.h>
int main()
{
	int n,i;
	double a[10]={2/1.0,3/2.0,5/3.0,8/5.0,13/8.0,21/13.0,34/21.0,55/34.0,89/55.0,144/89.0},sum=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		sum=sum+a[i];
	}
	printf("%.6f",sum);
}

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