Issues with fstream (and a hiccup with iostream)

I'd like to apologize in advance if this is a stupid question. I'm a bit of a beginner, giving CLion trial a try after using Code::Blocks for a while, and I'm having some issues getting started.

I'm trying to use fstream to i/o using files, but CLion seems to be having some trouble accessing them or something along those lines. Here's a sample program:

#include <fstream>
#include <iostream>

using namespace std;

ifstream fin("anarhie.in");
ofstream fout("anarhie.out");

int main() { 
    int x;
    cin >> x;
    cout << "output: " << x * 100 << endl;
    fin >> x;
    cout << x + 15 << endl;
    fout << x * 2 << endl;
    return 0;
}

If I input "2" in the console and "10" in anarhie.in, I'd expect to get "output: 200", followed by "25" in the console, as well as "20" in anarhie.out. However, I get

2
output: 200
17

in the console, which shows both that the input gets outputted again immediately, and that the value of x from anarhie.in was never read, remaining the initial "2". Additionally, nothing is ever printed to anarhie.out.

I'm probably just doing something really wrong, but I can't figure out what. I could appreciate a helping hand.

Thanks a lot!