#include<stdio.h> int main() { int i=2,j=1,n,t,x; float sum=0.0; scanf("%d",&n); for(x=1;x<=n;x++) { sum+=i*1.0/j*1.0; t=i; i=i+j; j=t; } printf("%.6f\n",sum); return 0; }
Double click to view unformatted code.