View Code of Problem 71

#include<stdio.h>
int main(){
   int i,k;
   double a=0.0,b=2.0,c=1.0,j;
   scanf("%d",&k);
   for(i=0;i<k;i++){
         a+=b/c;
	  j=c;
	  c=b;
	  b=j+b;
	  
   }
	 printf("%1.2lf",a);
 return 0;
}