View Code of Problem 71

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

}