View Code of Problem 48

    #include<stdio.h>
    int main()
    {
      int n;
      double b=1,a=2,sum=a/b,temp;
      scanf("%d",&n);
      for(int i=1;i<n;i++){
        temp=a;
        a=a+b;
        b=temp;
        sum=sum+a/b;
      }
      printf("%.6f",sum);
    }