View Code of Problem 71

#include<stdio.h>
int main()
{
  int n,i=2,j=1,t,x;
  float sum=0.0;
  scanf("%d",&n);
  for(t=1;t<=n;t++)
  {
    sum+=i*1.0/j*1.0;
    x=i;
    i=i+j;
    j=x;
  }
  printf("%.2f",sum);
  return 0;
}