42分,求调。教会互关!

#include<bits/stdc++.h>
using namespace std;
double f(double x,int n){
    if(n==1) return (x/(x+1));
    else return (x/(n+f(x,n-1)));
}
int x,n;
int main(){
    cin>>x>>n;
    printf("%.2f",f(x,n));
    return 0;
}