View Code of Problem 71

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