View Code of Problem 48

#include <stdio.h>
int main(void)
{
	double n,i,m = 2,p = 1,t,sum = 0;
	scanf("%lf",&n);
	for(i = 1;i <= n;i++)
	{
		sum += m/p;
		t = m;
		m += p;
		p = t;
	}
	printf("%.6lf",sum);
	return 0;
}