View Code of Problem 71

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