View Code of Problem 48

    #include<stdio.h>
    #include<math.h>
    int main()
    {
      int i,c,n,a=2,b=1;
      double sum=0.0;
      scanf("%d",n);
      for(i=0;i<n;i++)
      {
        sum+=a/b;
        c=a+b;
        b=a;
        a=c;
      }
      printf("%.6f",sum);
      return 0;
    }