View Code of Problem 48

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