View Code of Problem 48

                #include<stdio.h>
                #include<math.h>
                int main()
                {
                  int i,n;
                  double c,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;
                }