// People who program by guesswork are often wrong about .eof().
// They think that it means “Will the next read fail?”.
// They are wrong. It means “Did the previous read fail?”.

#include <iostream>
#include <fstream>

using namespace std;

int main() {
    ifstream in("/etc/resolv.conf");
    string line;

    while (!in.eof()) {
	getline(in, line);
	cout << "★★★ " << line << '\n';
    }
}