View Code of Problem 48

# include<stdio.h>
int main(void)
{
  int n,i,j;
  double a[10] = {2},b[10] = {1},sum = 0,t;
  scanf("%d",&n);
  for(i=0,j=0;i<9;++i,++j)
  {
      t = b[j];
      b[j+1] = a[i];
      a[i+1] = a[i] + t;
  }
  for(i=0;i<n;++i)
  {
    sum = sum + a[i]/b[i];
  }
  printf("%lf",sum);
  return 0;
}