View Code of Problem 48

#include<stdio.h> 
int main() 
{ 
    int n,i=2; 
    double a=1,b=2,sum=2.0,y,t; 
    scanf("%d",&n); 
    if(n==1) 
        printf("%.2lf",b/a); 
    while(i<=n) 
    { 
        t=a; 
        a=b; 
        b=t+b; 
        y=b/a; 
        sum=sum+y; 
        i++; 
    } 
    printf("%.6lf",sum); 
      
        return 0; 
  
}