View Code of Problem 71

#include<stdio.h>
int main()
{
	float a=2,b=1,sum=0;
	int t;
	scanf("%d",&t);
	for(int i=0;i<t;i++)
	{
		sum+=a/b;
		int k;
		k=a+b;
		b=a;
		a=k;
	}
	printf("%.2f",sum);
}