View Code of Problem 71

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